Facilitated diffusion requires _____.
A.membrane proteins
B.transport proteins
c.membrane pouch
d.energy
I NEED HELP ASAP!!
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Answer:B
Explanation:
Answer:membrane proteins is the right answer
Explanation:
What is gel electrophoresis used for?
O A. Cutting DNA into sections
O B. Separating strands of DNA
O C. Performing reverse transcription
O D. Cloning organisms
Answer:
B. separating strands of DNA
Gel electrophoresis used for separating strands of DNA
What is electrophoresis?Electrophoresis can be defined as a technique used to separate molecules of DNA, RNA or protein molecules on the basis of their electrical charge and size
It also used to identify microorganismsIt is also used in genetic testingElectrophoresis analysis is used in forensics to compare DNA,Below are four major components of gel electrophoresis:
DNA is extractedIsolation and amplification of DNADNA added to the gel wellsElectric current applied to the gel.Learn more about gel electrophoresis:
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The nucleus in both plant and animal cells “specializes” the cells so they can do different things- for example, a liver cell or a muscle cell do different things. Thinking about plants or trees, what special functions might different cells in a tree or plant do?
Answer:
od21xef3
Explanation:ewwe
2. Assume that crossing over does not occur in the region of each chromosome that is associated with the centromere. You have 46 centromeric regions in each cell, 23 that are copies of the DNA in your mother’s egg and 23 that are copies of the DNA father’s sperm. Show your work for A,B,C a. For any given gamete, what is the probability that all the centromeric regions (chromosomes) will be copies of the same ones that you received from your mother? b. It has been estimated that the average person is heterozygous for at least 2,000 protein forming genes. How many different kinds of gametes is it theoretically possible for each person to produce? c. Considering the maternal and paternal origin of the centromeric regions alone, how many different kinds of gametes can you produce?
Answer:
See below
Explanation:
A. centromeric regions from mother in one cell: 23
total number of centromeric regions in one cell: 46
for every centromeric region that is inherited by the gamete, there is a 0.5 probability that it is from the mother. Hence, if all are from the mother:
0.5 ^ 23 = 1.19 x 10^(-7)
B. Heterozygous for 2000 genes means 4000 possible alleles.
2 ^ 4000 = 1.3 x 10^(1204)
C. 2 ^ 46 = 7.03 x 10^(13)
How does the flu affect businesses and governments? Could it affect residents’ access to certain resources?
Answer:
Ofcourse it does
Explanation:
Imagine one person have flu and he or she goes to met someone who is healthy but when they talk other infected person's flu goes to other healthy person and that new infected person goes to another and they go to another and thats how it seperate. But we have solution for this the first infected person need to wear mask so that his or her flu don't pass out to anothers.
А (blank)
is a chemical substance that organisms require to live.
Answer:
Nutrient
Explanation:
Nutrients are compounds in foods which are essential to life and health of living organisms, providing them with energy. They are the building blocks for repair and growth and substances necessary to regulate chemical processes. There are six major nutrients:
Carbohydrates,Lipids (fats),Proteins,Vitamins,Minerals,Water.A researcher investigates a recently discovered species of plant. The plant has vascular tissues and exhibits a sporophyte and a gametophyte
generation, but lacks seeds. How should the researcher classify the plant?
Answer;
pteridophyte
Explanation;
Pteridophyte are vascular plants in the phylum plants that reproduce by releasing spores rather than seeds.Other characteristics of pteridophyte includes;
They show alternation of generations, that is the sporophyte generation and gametophyte generation are observed.Sporophytes has true roots, stem and leavesSporangia are produced in groups on sporophyllsWhat might happen to the organisms in the food web below if the number of phytoplankton and vegetation drastically decreased?
Answer:
i don't now exactly how to answer this when theres' no food chart however as the vegetation and phytoplankton drastically decrease everything decreases. This is because the producer the bottom of the food chain also known as vegetation is the prime source of energy in every food chain. when there's scarce amounts of producers a domino affect will occur. There will be no food for the first consumers to eat leading their population to decrease and the animals that feed off them will decrease then the animals that feed of them will decrease and so on until the organisms of the food web die out.
what is the composition of gastric juice and their functions?
Answer:
Mostly HCl, Pepsin, Lipase, Water, and other Electrolytes
Explanation:
The gastric mucosa secretes 1.2 to 1.5 litres of gastric juice per day. Gastric juice renders food particles soluble, initiates digestion (particularly of proteins), and converts the gastric contents to a semiliquid mass called chyme, thus preparing it for further digestion in the small intestine. Gastric juice is a variable mixture of water, hydrochloric acid, electrolytes (sodium, potassium, calcium, phosphate, sulfate, and bicarbonate), and organic substances (mucus, pepsins, and protein). This juice is highly acidic because of its hydrochloric acid content, and it is rich in enzymes. As noted above, the stomach walls are protected from digestive juices by the membrane on the surface of the epithelial cells bordering the lumen of the stomach; this membrane is rich in lipoproteins, which are resistant to attack by acid. The gastric juice of some mammals (e.g., calves) contains the enzyme rennin, which clumps milk proteins and thus takes them out of solution and makes them more susceptible to the action of a proteolytic enzyme.
Answers:
It is a unique combination of hydrochloric acid (HCl), lipase, and pepsin. It is found in all vertebrates.
Main function is to inactivate microorganisms.
Hope It helps.
addison disease
1. what are the symptoms
2. who can it affect the most
3. what other issuses it can cause
4. what medication or changes in diet or lifstyle can help with symptoms relief
HELP ME PLEASE!
Answer: Addison disease is an adrenal insufficiency. This occurs because of the fact that adrenal gland produces very low quantity of hormones like cortisol, and aldosterone.
Explanation:
1. The symptoms of addison disease are loss of appetite, increased thirst, low mood, and muscle fatigue.
2. The addison disease is an autoimmune reaction, which can affect people of all age groups.
3. It can cause other diseases like tuberculosis.
4. The hormone replacement therapy is ideal for the treatment for addison disease. The use of oral corticosteroids is ideal. The diet containing balanced proteins, carbohydrates, fats, increased intake of vegetables including vitamins, and minerals are necessary for treatment of addison disease.
The lock and key mechanism refers to
Which graph shows the presence of nitrogen-fixing bacteria in the soil
Answer:
2
Explanation:
The graph that shows the presence of nitrogen fixing bacteria in the soil would be graph 2.
Nitrogen fixing bacteria are bacteria that are capable of converting atmospheric nitrogen into plant-usable nitrogen in the soil. The conversion is done in two stages;
1. First, atmospheric nitrogen is converted into ammonia.
2. Ammonium is converted into usable nitrate
Hence, the correct graph is the one in which the amount of atmospheric nitrogen decreases with a corresponding increase in the amount of ammonia. This would indicate the conversion of nitrogen into ammonia which is the first step in nitrogen fixation by nitrogen-fixing bacteria.
Graph 2 represents the presence of nitrogen-fixing bacteria in the soil.
This is because in this graph the concentration of atmospheric nitrogen (N2) is lower and the concentration of ammonium (NH4) is higher. The nitrogen-fixing bacteria converts or fixes atmospheric nitrogen that can't be absorbed by the plants into ammonium or nitrates which can be absorbed by the plants and make necessary amino acids for the body so we can conclude that graph 2 indicates the presence of nitrogen-fixing bacteria in the soil.
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What element do all organic compounds contain?
Carbon
Hydrogen
Nitogen
Oxygen
Answer:
carbon
Explanation:
carbon is a chemical element which exhibit a atomic mass of 12 and its a nonmetal
Why didn't the fungus evolve to be resistant to bacteria's antibiotics?
Answer:
Antibiotic-resistant germs can multiply. Some resistant germs can also give their resistance directly to other germs.
Explanation: