Answer:
Prokaryotes lack a true nucleus with well defined nuclear membrane and other membrane-bound organelles. Mitochondria are the double membrane bound organelle and hence is absent in prokaryotes. Mesosome is an extension of the cell membrane presence in the cytoplasm as infolding and serves to increases surface area and as a site for cellular respiration in prokaryotes. Histones are positively charged proteins that serve in the packaging of negatively charged eukaryotic DNA but are absent in prokaryotes.
So, the correct answer is option A.(DNA is complexed with histones).
The statement which is not true for prokaryotic cell is that they are all parasitic. Thus, the correct option is C.
What is Prokaryotic cell?Prokaryotes are the organisms whose cells lack a nucleus and other membrane-bound organelles. Prokaryotic organisms are divided into two distinct groups which are the bacteria and the archaea, which scientists believe to have the unique evolutionary lineages. Most of the prokaryotes are small in size, single-celled organisms which have a relatively simple structure.
Examples of prokaryotic organisms are blue-green algae, bacteria and mycoplasma. Among the prokaryotes, bacteria are the most common and multiply very fast.
Therefore, the correct option is C.
Learn more about Prokaryotic cell here:
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Your question is incomplete, most probably the complete question is:
Which one of the following is not true of prokaryotes ?
(a) They are living cells
(b) They lack a nucleus
(c) They all are parasitic
(d) They are both archaea and bacteria
Which of the following best explains why a cell's plasma membrane is composed of two layers of phospholipids rather than just a single layer?
Answer: The hydrophilic tails are directed inward and the hydrophobic heads are directed outwards.
Explanation:
A phospholipid is made up of two ends a hydrophilic or water-loving end that is phosphate head and a hydrophobic tail that is made up of fatty acid tail. The arrangement of phospholipid in a bilayer structure allows the entry of oxygen, carbon dioxide, and lipids to pass through them via concentration gradient via simple diffusion.
Lipids are amphipathic molecules that compose the membrane. Membrane lipidic bilayers allow only the hydrophilic heads to interact with water inside and outside the cell, while hydrophobic tails remain in the interlayer space, away from water.
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Two lipidic layers compose the cell membrane. There are also proteins and glucans incrusted in between.
Since lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails, they need to form two opposite layers.
Lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells in contact with water. Meanwhile, their hydrophobic tails are against each other, constituting the internal part of the membrane.
Membranes are fluid, meaning that lipids and proteins composing them can move laterally, transversally, or rotationally.
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100 POINTS! PLEASE HELP
Answer:
A: solvent properties
B: melting and boiling points
C: surface tension
D: heat of vaporization
E:density
Explanation: I am pretty sure about most of these Dis the only questionable one please tell me if I am wrong. sorry if I am wrong.
Answer:
A: solvent properties
B: melting and boiling points
C: surface tension
D: heat of vaporization
E:density
Explanation:
What causes daytime and nighttime on earth
A sun spins in space
B earth revolves around the sun
C earth spins in space
D the sun revolves around earth
Answer:C
Explanation: I am Smart
is a group of cells that have the same function.
Answer:
Tissue
Explanation:
Answer:
tissue
Explanation:
Giving brainiest! Please help ASAP!!!
1. Krista is conducting an investigation to determine how much fertilizer is best for her sunflower plants. She uses five plants and gives each a different amount of water for six weeks. Each week, she measures the height of each plant. She records her findings in a chart.
Answer the following:
1a. What are the independent and dependent variables?
1b. What should she record in the chart?
1c. What kind of scientific investigation is this example?
Answer:
1a. Independent variable: WATER
Dependent variable: HEIGHT
1b. the height of each plant every week
1c. Experimental investigation
Explanation:
The independent variable in an experiment is the variable that is changed or manipulated by the experimenter. In this case, the independent variable is the AMOUNT OF WATER given to each plant.
Dependent variable is the variable that is measured in an experiment. It is the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is HEIGHT.
(1b) In an experiment, the dependent variable is the variable that is recorded. Hence, in this experiment, the HEIGHT of each plant every week is recorded in the chart.
1c) 1c. This investigation is a type of EXPERIMENTAL INVESTIGATION because it involves testing how the independent variable affects the dependent variable.
What is the fate of ATP and NADPH?
Can some please write this for me?I really dont care what the reason are I just need it done
Answer:
I will work my hardest. Thank you for considering me.
Explanation:
The reason for my application is I want to help people with their learning and increase their knowledge. I made this because I was inspired by a woman I knew who wanted to make the world a way better place than it is now. I want to follow in that same woman's footsteps. I love helping people also. It gives me a great feeling to know that, that same person that I just helped will remember what I did for them for a short time. I'm sure they'll understand a little bit more at least. I want people to understand their work and how to get it done without having to take a guess, second guess themselves, or get the entire answer wrong. It hurts their grade and their heart. Sometimes my heart too. So, in conclusion I created my application for people to get help on what they do not understand. Maybe, just maybe, after they try my application, they'll understand way better.
I really hope I did the right thing. Tell me if I didn't. I'm really sorry if I didn't I tried my best. I hope it helps you if I did do the right thing! :)
1.The structure most responsible for maintaining cell homeostasis is the
(1 Point)
cytoplasm
cell wall
mitochondria
plasma membrane
Answer:
Plasma Membrane
Explanation:
Hope this helps any!
What are sources of nitrogen in the environment ?
Answer:
Atmospheric precipitation, livestock and poultry operations and urban wastes.
Explanation:
How are mitosis and meiosis similar?
A. They both produce tetrads.
B. They both involve duplicating chromosomes
C. They both produce gametes
D. They both increase the chromosomes number.
Answer:
The answer is "B: They both involve duplicating chromosomes'
Explanation:
Which of the following best represents a function of a lipid within an organism? O Lipids are components of cell membranes All the answer choices are correct O Lipids are parts of proteins O Lipids form a large part of the helical DNA structure
Answer:
The statement that best represents a function of lipids within an organism is that they are components of cell membranes.
Explanation:
Lipids are biomolecules formed by the binding of fatty acids, important for structure, compound synthesis and energy reserve.
In living beings, one of the most important functions of lipids is to be the main component of cell membranes.
Specifically, phospholipids associate to form a double layer, called lipid bilayer, capable of acting as a semi-permeable membrane, due to its non-polar or hydrophobic character. In this way, membrane lipids fulfill a structural and protective function of the cell and its contents.
Regarding the other options:
Proteins are made up of amino acids, not lipids. Lipids are not constituents of the DNA structure.Which particles are NOT included in determining the mass of an atom?
Neutrons
Nucleus
Protons
Electrons
Answer:
Electrons
Explanation:
The neutrons and protons are found in the nucleus of an atom to find the atomic mass.
Example of reproduction
Answer:
a deer giving birth to a baby deer
If a cell displays a great amount of activity, one possible reason for this could be that it has large quantities of
Answer:
mitochondria
Explanation:
In cells where there is a high energy demand large numbers of mitochondria are found. The tail of a sperm contains many mitochondria and they run in a spiral like form along the length of the tail. In heart muscle cells about 40% of the cytoplasmic space is taken up by mitochondria.
Which of the following events occurs the earliest during the process of photosynthesis?
Answer:
If you give me the choices to choose from I cna answer.
Explanation:
Can anyone help please?
Answer:
Carbohydrates- Short term energy
Lipids- Long term energy
Nucleic acids- Store genetic information
Protiens- Many cellular functions
Can parts of a system also be a system?
Answer:
yes A system can be also be a system
The diagram shows a food web , In the food web - ( I NEED HELP ASAP )
10 points
The diffusion of water molecules in and out of cells is very common.
Which of the following is the process by which water moves across a
membrane, from an area of high concentration to low concentration,
without the use of energy? *
osmosis
hydrolysis
photosynthesis
cyclosis
Osmosis is the process; it is essentially diffusion, which is a spontaneous (no energy input required) process as applied to water.
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Hydrolysis is incorrect; that describes a type of chemical reaction in which water breaks a chemical bond.
Photosynthesis is incorrect; that describes the complex process in which energy in light is converted into chemical energy.
Cyclosis is incorrect; that describes the movement of cytoplasm within a cell. There is no spontaneous, net movement of water across a concentration gradient.
Where is the error in the diagram?
DNA is copied during the shortest stage.
The cytoplasm divides during the longest stage.
The nucleus divides in the stage before the cytoplasm divides.
Both the nucleus and the cytoplasm divide in the same stage.
Answer:
But where is your diagram
Answer:
C
Explanation:
This is the science of correct reasoning. The basic components are statements that can be true or false, but never both.
Answer:
The basic components are statements that can be true or false, but never both. Magnetic Resonance Imaging This is a non-invasive body imaging procedure that uses powerful magnets and radio waves to construct pictures of the internal structures of the body.
Explanation:
Rollover accidents contribute to which of the following categories of agricultural workplace hazards?
respiratory risks
excessive noise
unclean conditions
vehicle hazards
Answer:
Unclean conditions
Explanation:
Answer:
Vehicle Hazards
Explanation:
Why is a cell membrane so important
Answer:
-provides protection for a cell
-provides a fixed environment inside the cell.
-The cell membrane also provides some structural support for a cell.
Explanation:
Answer: The cell membrane is very important because it provides mainly all the protection over the cells. It’s flexibility also helps a LOT!
c) Why does the ethanol change colour?
Answer:
Ethanol change color because ethanol gets oxidized to form ethanoic acid whose color will change from orange to green.
Explanation: The ethanol will undergo an oxidation reaction where ethanoic acid is formed which will result in the formation of chromium disulphite.
What are the two main proceses of the carbon cycle?
Answer:
this chart will help!
Explanation:
Could there be some kind of molecular editing system ? What tools could be devised to work with genes? Could scientists then create tailored DNA molecules
What would be the most likely outcome for plants on Earth if glucose molecules in cellulose were not arranged in an alternating pattern?
Plants would not be able to create polysaccharides.
Plants would not have the structural support they need.
Plants would not be able to produce chlorophyll.
Plants would not be able to store starches.
How do I open a jar of pickles without breaking the glass
*false answers only*
Btw I don't like pickles....;(
Answer:
swallow the jar then it might open inside your stomach
Explanation:
I'm Joking don't do that.
lol
Answer:
Break the glass then eat a big peace of glass with the pickle juice and think about a pickle.
Explanation:
it taste the same just one will take you to the hospital lol
What three things create surface currents?
Answer:
Global Winds, blows across the earth's surface creating surface currents. Different winds cause the currents to flow in different directions.The Coriolis Effect, the apparent curving of moving objects from a straight path caused by the rotation of the earth.Continental Deflections, is where the surface currents meet continents causing them to change directions.Explanation:
I hope this is the answer you were looking for.
40 POINTS -What is the purpose of cellular respiration? How does it occur?
Answer:Cellular respiration is the process through which cells convert sugars into energy. To create ATP and other forms of energy to power cellular reactions, cells require fuel and an electron acceptor which drives the chemical process of turning energy into a useable form.
