The function of LCAT (Lecithin-Cholesterol Acyltransferase) is to catalyze the production of cholesteryl esters.
Here, correct option is A.
LCAT is an enzyme that is involved in cholesterol metabolism in humans. It takes free cholesterol and combines it with phospholipids and fatty acids, creating a cholesteryl ester. This process is known as esterification and is important for maintaining the levels of cholesterol in the body. Without this enzyme, cholesterol would remain in the form of free cholesterol, which can lead to a variety of health problems.
LCAT works to protect the body by converting free cholesterol into the more stable form of cholesteryl esters. This helps to regulate the levels of cholesterol in the body, ensuring that it is within the optimal range. As such, LCAT plays a critical role in maintaining good health and preventing a variety of cardiovascular diseases.
Therefore, correct option is A.
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parasympathetic signals to the heart will ______ (slow/ speed up) the heart rate. these are delivered by what nerve?
Parasympathetic signals to the heart will slow down the heart rate. These signals are delivered by the vagus nerve, which is also known as the tenth cranial nerve.
What affects heart rate does the parasympathetic nervous system have?Heart rate is accelerated by the sympathetic nervous system while it is decreased by the parasympathetic nervous system. Electrocardiography (ECG) can be used to analyse heart rate variability (HRV).
Which nerve regulates heart rate?The vagus nerve, the longest of the 12 cranial nerves, runs on each side of the body from the brainstem through the chest to the abdomen. It performs as a component of the body's involuntary nervous system, which manages unconscious bodily tasks such controlling respiration, heart beat, and food digestion.
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most peptide and amino acid derivative hormones end in ______ while most steroid hormones end in _________.
Most peptide and amino acid derivative hormones end in "-in" or "-ine", while most steroid hormones end in "-ol" or "-one".
Peptide and amino acid derivative hormones are typically composed of chains of amino acids, and include hormones such as insulin, glucagon, adrenaline, and thyroxine.
These hormones often have names that end in "-in" or "-ine", such as insulin, glucagon, epinephrine, and thyroxine. Steroid hormones, on the other hand, are derived from cholesterol and include hormones such as testosterone, estrogen, and cortisol.
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Is nature (DNA) more important than nurture (home environment) in determining whether a person will be successful or not. Defend your answer
Nature (DNA) and nurture (home environment) both play significant roles in determining a person's success, and neither one can be considered more important than the other.
While a person's genetic makeup (nature) can influence certain traits such as intelligence, temperament, and physical abilities, it is the environment (nurture) that can shape and develop these traits into successful outcomes. Factors such as access to education, socio-economic status, family support, and cultural influences can all play a crucial role in determining a person's success.
Ultimately, both nature and nurture work together in a complex interplay to influence a person's success, and it is important to consider both factors when trying to understand and support individual development.
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Which one of the following pesticides can be absorbed by the plant and translocated within the plant?
A. Systemic pesticide
B. Contact pesticide
C. Absorptive pesticide
D. Volatile pesticide
The pesticides that can be absorbed by the plant and translocated within the plant is: Systemic pesticide. The correct option is (A).
A systemic pesticide is designed to be absorbed by the plant and translocated within the plant, allowing it to provide protection from the inside out.
This is in contrast to contact pesticides, which only affect pests upon direct contact, absorptive pesticides that may not be translocated, and volatile pesticides that evaporate quickly and do not have long-lasting effects on the plant.
However, there is concern about the potential health and environmental risks associated with systemic pesticides, as they can also affect non-target organisms and accumulate in the environment.
It is important to carefully consider the risks and benefits of using systemic pesticides and to follow proper application and disposal procedures to minimize negative impacts.
Additionally, integrated pest management practices that incorporate multiple methods of pest control, including biological and cultural control methods, can help reduce reliance on pesticides in agriculture.
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: Level I: Reviewing Facts and Terms (Bloom's Taxonomy: Comprehension)
33) The enzyme renin is responsible for the activation of
A) angiotensin.
B) cortisol.
C) erythropoietin.
D) atrial natriuretic peptide.
E) adrenaline.
The enzyme renin is responsible for the activation of angiotensin. The correct option is A.
The juxtaglomerular cells in the kidneys produce and release the enzyme renin in response to a number of conditions like low blood pressure, low blood volume, and low sodium levels in the blood. Angiotensinogen is a protein made by the liver and released into the bloodstream is changed into angiotensin I by the action of renin.
An enzyme called angiotensin converting enzyme , which is primarily found in the lungs, then transforms angiotensin I into angiotensin II. Angiotensin II is a potent vasoconstrictor that can raise blood pressure and trigger the adrenal glands release of aldosterone which encourages the kidneys retention of sodium and water. The correct option is A.
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Is Methimazole (Tapazole) pregnancy safe?
Methimazole (Tapazole) is not considered safe during pregnancy, especially during the first trimester, as it can cross the placenta and affect fetal thyroid function.
Methimazole is used to treat hyperthyroidism, which is an overactive thyroid gland that produces too much thyroid hormone. Hyperthyroidism in pregnancy can lead to complications such as preterm birth, low birth weight, and fetal and maternal thyrotoxicosis.
If a woman becomes pregnant while taking methimazole, she should consult her healthcare provider immediately. In most cases, the healthcare provider will switch the woman to a different medication, such as propylthiouracil (PTU), which is considered safer for use during pregnancy. However, in some cases, methimazole may be continued in the lowest effective dose, particularly if switching to PTU is not possible or if the woman has a history of adverse reactions to PTU. The decision to use methimazole during pregnancy should be made on a case-by-case basis and carefully weighed against the potential risks to the fetus.
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if peter is allergic to peanuts and paul is not, what is the precise molecular difference in peter's bloodstream responsible for this?
Peter's allergy to peanuts is caused by a specific immune response to a protein found in peanuts called Ara h 1. When Peter ingests peanuts, his immune system recognizes the Ara h 1 protein as foreign and mounts an allergic reaction
This reaction is caused by the binding of IgE antibodies to the protein, which triggers the release of histamine and other inflammatory mediators.
The precise molecular difference in Peter's bloodstream responsible for this is the presence of IgE antibodies specific to Ara h 1. These antibodies are produced by B cells in response to previous exposure to peanuts or peanut-derived products.
In contrast, Paul's immune system does not produce IgE antibodies to Ara h 1, and therefore he does not have an allergic reaction to peanuts.
It is important to note that allergic reactions are complex and involve multiple factors beyond just the presence of specific antibodies.
Other factors such as genetics, environmental factors, and the overall state of the immune system can all play a role in determining whether someone will develop an allergy.
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the Calvin cycle is sometimes referred to as the _____ because it does not use light energy directly
The Calvin cycle is sometimes referred to as the light-independent reactions or the dark reactions because it does not use light energy directly.
It uses the energy stored in ATP and the reducing power of NADPH (both produced during the light-dependent reactions) to drive the carbon fixation and sugar synthesis processes in the stroma of the chloroplasts. The Calvin cycle involves a series of biochemical reactions that convert carbon dioxide into glucose and other organic molecules, which are used by the plant for growth and metabolism. While the Calvin cycle is not directly dependent on light, it cannot occur without the energy and reducing power generated by the light-dependent reactions.
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Large amounts of protein are found in the urine of a patient. Based on this information, which portion of the nephron is most likely malfunctioning?A.Collecting ductB.Distal tubuleC.GlomerulusD.Loop of Henle
Large amounts of protein in the urine of a patient is a condition known as proteinuria, and it can be an indication of a malfunction in the glomerulus of the nephron. The Correct option is C
The glomerulus is responsible for filtering blood and separating waste products from useful substances that need to be reabsorbed by the body. When the glomerulus is damaged or inflamed, it can allow protein molecules to pass through into the urine.
The distal tubule, loop of Henle, and collecting ducts do not typically play a role in the development of proteinuria, although their malfunction can lead to other types of urinary issues.
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1) The primary route for water loss from the body is the ________ system.
A) respiratory
B) urinary
C) digestive
D) integumentary
E) cardiovascular
The primary route for water loss from the body is the respiratory system. Hence, the correct option is A.
The primary route for water loss from the body is through the respiratory system, specifically through the process of breathing out or exhalation. During respiration, the body takes in oxygen and releases carbon dioxide, as well as water vapor. This water vapor is a byproduct of the process of gas exchange that occurs in the lungs.
When we breathe in air, it is humidified by the mucous membranes in the nose and airways, adding moisture to the air. As we exhale, this moist air is released from the body, along with the carbon dioxide that has been produced as a waste product of cellular respiration.
Hence, the correct option is A.
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The process in the hydrologic cycle in which water vapor is released from leaves into the atmosphere is calledinfiltrationtranspirationsublimationreflectionpercolation
the Transpiration is the hydrologic cycle mechanism by which water vapour from leaves is discharged into the atmosphere.
What is the term for transpiration?'Transpiration' refers to the mechanism through which plants expel extra water through stomata on the surface of leaves. Water from plant leaves evaporates mostly through transpiration. Tomata, a tiny hole on leaves, aid in the passage of water out of the plant.
Describe the process of transpiration.The physiological loss of water in the form of water vapour, primarily from the stomata in leaves, but also by evaporation from the surfaces of leaves, flowers, and stems, is known as transpiration.
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: Level I: Reviewing Facts and Terms (Bloom's Taxonomy: Comprehension)
34) Angiotensin I is converted to angiotensin II by enzymes primarily located in the
A) kidneys.
B) liver.
C) heart.
D) lungs.
E) blood vessels.
Angiotensin I is converted to angiotensin II by enzymes primarily located in the lungs. The correct option is D.
The pulmonary capillaries, which are tiny blood vessels in the lungs that help with gas exchange between the air sacs and blood, contain high concentrations of the enzyme ACE. Angiotensin II, a potent vasoconstrictor that raises blood pressure, is created when ACE transforms angiotensin I, a precursor molecule, through these blood vessels.
Aldosterone, a hormone made by the adrenal cortex that aids in controlling electrolyte balance and blood pressure, is also stimulated by angiotensin II. Other effects of angiotensin II include enabling blood vessel constriction, increasing sodium and water absorption in the kidneys, and promoting the release of antidiuretic hormone to retain water. The correct option is D.
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fill in the blank."The energy content and biomass of ________ is lowest in any terrestrial food web.
A) producers
B) top carnivores
C) small carnivores such as spiders and lizards
D) decomposers
E) detritivores"
B) top carnivores
The energy content and biomass of top carnivores is lowest in any terrestrial food web .
Option b is correct .
On the first and lowest level are the producers, or green plants. The herbivorous or plant-eating organisms of the second level consume plants or their byproducts.
As a result, carnivores that eat other carnivores (tertiary consumers) and herbivores and detritivores (secondary consumers) have access to the least amount of energy. The pyramid's base, which is also its highest level, is where the producers are situated.
Hence , Option b is correct .
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What does "Classification systems are the inventions of humans: diversity is the product of evolution." mean?
"Classification systems are the inventions of humans: diversity is the product of evolution." mean division of living organisms in various group.
This claim implies that the classification schemes used to organize and categorize the diversity of life on Earth are man made structures. However, the diversity itself is a byproduct of evolution, which has produced a vast number of species with distinctive traits and adaptations.
Additionally, this claim raises the possibility that classification schemes may be constrained by their human origins and may not always accurately represent the complexity and diversity of life.
Natural selection and other evolutionary forces have acted over millions of years to produce the diversity of life on Earth, whereas the classification schemes used to study and organize that diversity are tools created by humans to aid in our understanding and rationalization of it.
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According to the Myers-Briggs Type Indicator, the __________ dichotomy measures how individuals orient themselves to the external world.
Answer:
Judging-Percieving.
Explanation:
According to the Myers-Briggs Type Indicator, the Judging-Percieving dichotomy measures how individuals orient themselves to the external world.
In an ideal intercuspal position, the cusp tip of a permanent maxillary canine should contact.
a. the mandibular lateral incisor only
b. no other tooth
c. the mandibular canine only
d. the mandibular first premolar only
e. both mandibular canine and first premolar
Answer: b. no other tooth
Explanation:
true or false: the ability of a microbe to evade the first and second lines of immune defense is critical to the microbe's ability to cause disease.
Answer:
True
Explanation:
The immune system is the body's defense mechanism against infections by microbes such as bacteria, viruses, fungi, and parasites. The immune system has two lines of defense. The first line of defense include physical, chemical, and biological barriers that prevent microbes from entering the body. The second line of defense includes innate immune responses such as inflammation, fever, and activation of immune cells.
Elongation (2nd step of Prokaryotic Translation)
Elongation (2nd step of Prokaryotic Translation) the procedure by which a protein is created using the genetic information encoded in mRNA.
The ribosome moves along the mRNA molecule during elongation, reading the codons and incorporating amino acids into the lengthening polypeptide chain.
The binding of aminoacyl-tRNA, formation of peptide bonds, and translocation are the three main steps in the elongation process. Up until the ribosome reaches a stop codon, which indicates the conclusion of the protein-coding sequence, this process is repeated repeatedly.
The ribosome then releases the freshly created protein and separates, liberating the mRNA and tRNA molecules for use in subsequent translation cycles.
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How is rDNA made?Examples of how other restriction enzymes cleave DNA:
The ability to cleave rDNA molecules at particular DNA sequences is a characteristic of restriction enzymes. Using restriction enzymes, DNA sequences are sliced at specified nucleotide locations. To create recombinant DNA, some foreign genes are put into plasmids.
A restriction Example for enzyme functions via shape-to-shape matching, just like all other enzymes. The enzyme wraps around the DNA and breaks both of the DNA strands when it comes into contact with a DNA sequence that has a shape that matches a recognition site on the enzyme.
One of the best resources available to molecular biology researchers is the Type II restriction enzymes. These enzymes can cleave at or very near the recognition sites of short DNA sequences (4–8 nucleotides) (1,2).
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Approximately how many documented (known) extinctions are we aware of in modern times?
There are currently over 800 documented extinctions of species in modern times. This includes animals, plants, and fungi, among other organisms.
The majority of these extinctions have occurred in the last two centuries, as a result of human activities such as habitat destruction, over-exploitation, and introduction of invasive species.
The exact number of extinctions is difficult to determine, as many species have gone extinct without ever being recorded. This is especially true for plants, invertebrates, and other species that are not as well-studied as more charismatic species such as mammals and birds.
However, the number of known extinctions is likely to be a small fraction of the actual number of species that have gone extinct since the beginning of the industrial revolution.
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What is the etiology of Impaired Gas Exchange related to?
The etiology of Impaired Gas Exchange is related to various factors that hinder the proper exchange of oxygen and carbon dioxide between the alveoli in the lungs and the blood vessels.
These factors can include respiratory illnesses, such as pneumonia or chronic obstructive pulmonary disease (COPD), impaired lung function due to injury, environmental factors like exposure to harmful substances, or conditions affecting blood flow or oxygen transport, such as anemia or heart failure.
It is important to identify and address the underlying cause in order to improve gas exchange and overall respiratory function. The underlying cause of Impaired Gas Exchange needs to be identified and treated appropriately to improve oxygenation and prevent complications.
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the gpp of a forest ecosystem is 120 units per year and the npp is 80 units. what is the respiration rate of primary producers in the forest?
The respiration rate of primary producers in the forest is 40 units per year. This means that out of the 120 units of organic matter produced by photosynthesis, 40 units are used by primary producers for their own respiration, leaving 80 units available as net primary productivity to support the rest of the ecosystem.
The Gross Primary Productivity (GPP) of an ecosystem is the total amount of organic matter that is produced by photosynthesis, while the Net Primary Productivity (NPP) is the amount of organic matter that remains after subtracting the energy used by primary producers for respiration.
To calculate the respiration rate of primary producers in the forest, we can use the following equation:
Respiration = GPP - NPP
Substituting the given values, we get:
Respiration =[tex]120 - 80[/tex]
Respiration = 40 units per year
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average cardiac output, HR, and SV for endurance trained and untrained men during maximal activity
Endurance-trained men typically have higher cardiac output, lower heart rate, and greater stroke volume compared to untrained men during maximal activity.
1. Cardiac Output (CO): Endurance-trained men have an average CO of 25-35 L/min, while untrained men have an average CO of 20-25 L/min during maximal activity.
2. Heart Rate (HR): Endurance-trained men have a lower average HR of around 180-200 bpm, while untrained men have an average HR of 200-220 bpm during maximal activity.
3. Stroke Volume (SV): Endurance-trained men have a greater average SV of 100-120 ml/beat, while untrained men have an average SV of 70-90 ml/beat during maximal activity.
These differences result from physiological adaptations due to endurance training, such as a larger and stronger heart, which allows for more efficient blood circulation during exercise.
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a living organism that possesses a novel combination of genetic material obtained through the use of modern biotechnology
A living organism that possesses a novel combination of genetic material obtained through the use of modern biotechnology refers to a genetically modified organism (GMO). GMO has been engineered to exhibit new traits or characteristics that can be beneficial for various purposes, such as increased crop yields or improved resistance to environmental stressors.
The process goes as follows:
1. Living organism: This refers to any organism that exhibits the characteristics of life, such as growth, reproduction, and metabolism. Examples include plants, animals, and microorganisms.
2. Novel combination: This implies the introduction of new or unique genetic traits that were not previously present in the organism's natural genetic makeup.
3. Genetic material: This refers to the DNA (deoxyribonucleic acid) of an organism, which carries the instructions for the development, functioning, and reproduction of the organism.
4. Modern biotechnology: This involves the use of advanced scientific techniques and technologies to manipulate an organism's genetic material. Examples of modern biotechnology techniques include gene editing, gene cloning, and recombinant DNA technology.
To create a GMO, scientists use modern biotechnology techniques to insert specific genes from one organism into the DNA of another organism. This results in a novel combination of genetic material, which provides the GMO with new traits or characteristics that were not previously present. For example, a crop plant might be genetically modified to be resistant to certain pests or to tolerate specific herbicides.
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Although our bones are light, most are how many times stronger than steel?
Despite being relatively light, bones are extremely strong. As a matter of fact, bones are around 4-5 times lighter than steel yet can really depend on multiple times more grounded than steel.
However, the precise strength of bone varies according to its density and location in the body. For instance, the femur (thigh bone) is quite possibly the most grounded bone in the human body and can uphold as much as 1,800 pounds of power, while the bones in the hands and feet are a lot more modest and not as solid.
The elastic modulus of bone is typically comparable to that of concrete, but it is ten times stronger when compressed. Bone is three times lighter than stainless steel, despite having the same compressive strength as stainless steel.
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WAD: Occiput/Atlas/Axis Injuries- bleeding/blood in & around the A-A joint may cause chemical irritation of the ___ nerve root; in the chronic stage, fibrous tissue may organize in/around the nerve
Injury to the occiput, atlas and axis can cause bleeding and blood accumulation around the atlanto-axial joint, leading to chemical irritation of the C2 nerve root.
Fibrous tissue may develop around the nerve root during the chronic period, causing more irritability and pain. Occipital, atlantoaxial, and axis injuries most frequently impact the C2 nerve root since it is the lowest in the cervical spine.
Both the motor and sensory regulation of the muscles of the neck and scalp are carried out by this nerve root. The patient may have discomfort and/or muscular weakness in the neck and scalp if the C2 nerve root is damaged.
Additionally, nausea, vertigo, and trouble regulating the neck muscles might result from inflammation of the C2 nerve root. Rest, physical therapy, and medication are all used as treatments for C2 nerve root irritation or injury. For long-term relief, surgery may be required in severe situations.
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Pregnant servicewomen shall be exempt from standing at parade rest or attention for longer than how many minutes
The following restrictions do not apply to pregnant servicewomen: (a) Remaining at march rest at attention for more than 15 minutes.
Up to delivery, warriors can continue to serve in the military by working shifts. The healthcare professional may modify the soldier's duties for those with problematic pregnancies. Free from marching rest or standing at attention for more than 15 minutes at 20 weeks of pregnancy.
Your branch may grant you up to 12 weeks of maternity leave, and your secondary caregivers (typically a spouse) may also be granted time off. You are also given a special uniform. Eight weeks of prenatal leave are included in this. A woman is entitled to a full year of pregnancy leave if the kid they adopted is under three months old.
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which molecule in signaling is not considered a second messenger? a. calcium b. gtp c. inositol 1,4,5-triphosphate d. cyclic amp
The correct option is (B). GTP (guanosine triphosphate) is not considered a second messenger in signaling.
The molecule in signaling that is not considered a second messenger among the given options is: (b.)GTP
A second messenger is a molecule that relays signals received by cell surface receptors to target molecules inside the cell. In the given options, calcium (a), inositol 1,4,5-triphosphate (c), and cyclic AMP (d) are all considered second messengers. However, GTP (guanosine triphosphate) is not a second messenger; instead, it is a nucleotide that provides energy and plays a role in signal transduction as a substrate for G-proteins, but it does not act as a second messenger itself.
A second messenger is a signaling molecule that is produced inside a cell in response to an extracellular signal, such as a hormone or neurotransmitter binding to a receptor on the cell surface. Second messengers relay the signal from the receptor to downstream signaling pathways, ultimately leading to a cellular response.
Examples of second messengers include cyclic AMP (cAMP), inositol triphosphate (IP3), and diacylglycerol (DAG). These molecules are produced in response to the binding of extracellular ligands to G protein-coupled receptors or receptor tyrosine kinases, which are transmembrane proteins that activate intracellular signaling pathways.
Once produced, second messengers diffuse through the cytoplasm and bind to specific target proteins, such as protein kinases or ion channels, to initiate downstream signaling events. Second messengers can also act on other second messengers, amplifying the initial signal and leading to a more robust cellular response.
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which of the following is true? a. some codons in a gene code for more than one single amino acid b. every codon codes for an amino acid. c. every amino acid is coded for by a single codon d. there are more codons than there are amino acids.
The correct answer among all the options is B) Every codon codes for an amino acid.
A codon is a sequence of three nucleotides that encode for a specific amino acid.
There are 64 possible codons, but only 20 amino acids are commonly found in proteins. This means that multiple codons can code for the same amino acid.
For example, the amino acid leucine can be encoded by six different codons. However, each codon only codes for a single amino acid.
This is due to the genetic code, which is a set of rules that determines how nucleotide triplets are translated into the 20 amino acids that make up proteins.
The genetic code is nearly universal, meaning that the same codons code for the same amino acids in almost all living organisms.
In summary, every codon codes for an amino acid, but some amino acids can be encoded by multiple codons. Hence, the correct option is B, every codon codes for an amino acid.
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why do chemical reactions in the body require enzymes? match the words in the left column to the appropriate blanks in the sentence on the righn any reaction catalyzed by an enzyme, the reacting molecule is called the isozyme. substrate. allostere. cofactor. coenzyme.
In any reaction catalyzed by an enzyme, the reacting molecule is called the: substrate.
Chemical reactions in the body require enzymes because enzymes act as biological catalysts, which speed up the rate of these reactions.
Enzymes lower the activation energy needed for a reaction to occur, allowing the reactions to proceed more efficiently and at a faster rate. This is essential for maintaining the proper functioning of various metabolic processes within the body.
In an enzyme-catalyzed reaction, the reacting molecule is called the substrate. The substrate binds to the enzyme's active site, forming an enzyme-substrate complex.
The enzyme then facilitates the conversion of the substrate into products, which are released from the active site, allowing the enzyme to be reused for further reactions.
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