Cell Biology Questions
Asked by Users

What is the optimum pH for enzyme activity ?  Click on post comments to answer.

Which of the following is not a cell organelle?  A.Mitochondrion
B.Cytoplasm
C.Endoplasmic reticulum
D.Lysosome

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Which stage of aerobic respiration requires carbon dioxide?  Click on post comments to answer.

Coconut milk used in tissue culture enhances cell division and plant growth. What is the active ingredient in coconut milk that causes this effect?  Click on post comments to answer.

"The diffusion of hydrogen ions through ATP synthase which subsequently causes ATP synthase to combine phosphate ion with ADP" defines which of the following words?  1.Chemiosmosis

2.Citric Acid Cycle (a.k.a. Krebs Cycle)

3.ATP Synthase

4.Electron Transport Chain (ETC)

5.Cytochromes


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What is a cell membrane?  Click on post comments to answer.

What are the parts that all cells have?  Click on post comments to answer.

What is the process where many cells manufacture substances which are then excreted to be used in other parts of the body?  Is it phagocytosis?

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Do eukaryotic cells have chromosomes in the cytoplasm?  Click on post comments to answers.

What does the rate at which materials enter and leave the cell depend on?  Is it volume, weight or surface area?

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What are the factors that determine the structure or shape of a cell?  ?

What happens in cellular repiration when there is no oxygen available?  The cell does not function properly and eventually dies.

How different are the amount of energy stored in ATP and glucose?  These two are alike because they are both stored during photosynthesis.

What is the most common cell known?  What is the most common cell known?

Where does glycolysis take place?  I don't know.

What is the molecule used to store energy?  Pls, answer.

Which cell structure contains the cell's genetic material and control many of the cell's activities?  Organelle, nucleus, cell envelope, cytoplasm...

What is a ribosome?  It is in the cell.

Before entering the second stage of cell respiration, pyruvic acid is first converted into what?  Glucose?

Describe the process of energy production by aerobic respiration from biochemical and cellular levels to anatomical and physiological levels within the human organism.  Adenosine triphosphate (ATP) is the energy currency of life. It is the high-energy molecule that stores the energy within the body needed for all body ...

What is the relationship between the chromosomes and the spindle? When is this relationship formed?  Prophase, mitosis begins and changes occur.

How do the differences in mitosis and meiosis affect the end result?  How do the different phases in mitosis and meiosis affect the end result?

Due to mistake during transcription, ATG forms UAG in mRNA. What change would occur in polypeptide chain translated by this MRNA?  Don't know any answer.

How many cells would be present at the end of the first, second, fifth, tenty, twentieth mitotic division?  I really don't know the answer to this question.

Where are all the different kinds of RNA transcribed?  In the nucleus.

What is the type of cross link in a tertiary structure?  Attraction hydrogen bond, ionic bonding, a hydrogen attraction, or hydrophobic.

Despite differences in size and shape, all cells have cytoplasm and a...?  ?

During the Krebs cycle why carbon dioxide is released but not carbon?  During Krebs cycle its main aim is to release carbon; then it can release only carbon but that doesn't happen. It releases carbon dioxide. Why?

The types of membrane proteins responsible for selective permability are?  please help :)

In the case of ________ , the resulting daughter cells are identical chromosomally to what?  Mitosis or meiosis.

A scientist treats a cell with a chemical that destroys the ribosomes. As a result, which cell process will be stopped?  Protein synthesis, photosynthesis, respiration and osmosis?

The majority of the 36 ATP's produced in cellular respiration are generated in the...?  Electron transport system.

What are the similar features found in the cells of bacteria, fungi and plants?  What are the similar features sound in the cells of bacteria, fungi and plants?

What are three examples of protein synthesis?  And how can the enviroment affect the phenotype?

Before the cell enters the prophase can you determine whether it is about to enter mitosis or meiosis? Is it possible to make that determination?  Mitosis and Meiosis begin essentially in the same manner.

What is the role of NAD and FAD?  ?

What is the function of mRNA?  What is the function of mRNA?

What are two differences between eukaryotic and prokaryotic cells?  I need 2 differences between them.

Which animals are capable of photosynthesis?  E.g., jellyfish?

What relates cell reproduction to the replacement of the skin cells?  What relates cell reproduction to the replacement of the skin cell?

What happens when a large sized organelle involved in intracellular digestion is empty?  Lysosomes are involved.

Enzyme activity does not depend on pH?  1. Stop codons are present on:


a)The coding strand of DNA, where they signal the end of transcription

b)The template strand of DNA, where they ...

What is the chemical process of photosynthesis and what does it produce?  6 CO2+6H2O+LIGHT ---> C6H12O6+6 O2

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What happen to ribosomes after protein synthesis?  Ribosomes are separated and lie in the cytoplasm as separated sub units...

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When a cell divides during the process of cleavage, each daughter cell, compared with the parents cell, has?  more cytoplasm?
less cytoplasm?
more chromosomes?
less chromosomes?

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Which form of cell division ends up with a smaller number of chromosomes in each cell?  Meiosis or mitosis?

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What type of cells result from mitosis?   Click on post comments to answer.

A cell nucleus sends out molecules that carry instructions for protein synthesis. What is the destination of these molecules?  A)enzymes
B)ribosome
C)cytoskeleton
D)cell membrane

What is the Krebs cycle?  It has to do with photosynthesis or cellular respiration, but it is complicated.

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How many ATPs are possible to make during aerobic respiration?  5?

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Does protein synthesis occur in mitochondria?  Click on post comments to answer.

How do the temperature and pH affect cellular activities?  Click on post comments to answer.

If cells were placed in a lipid solvent, how many net ATP molecules would be generated per glucose molecule?  Click on post comments to answer.

State the origin and fate of the following molecules involved in photosynthesis:  (a) Carbon dioxide
(b) Oxygen
(c) Hydrogen

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What is the division of cytoplasm called?  Click on post comments to answer.

What is the structure of the chloroplast?  Click on post comments to answer.

In what region of the cells is the stain darkest? Why?  Click on post comments to answer.

Where in the cell does the glycolysis part of cellular respiration occur? Why?  Click on post comments to answer.

What is the structure and function of the following: nucleus, cell membrane, cell wall, mitochondria, vacuoles, chloroplasts and ribosomes?  Click on post comments to answer.

Note: read our review on cell structure.

What is it called when phospholipids allow water and molecules to pass through the cell? And why?  Click on post comments to answer.

Does interphase happen again after meiosis?  Click on post comments to answer.

Which of the following is the site of translation ? a) ribosome b) vacuole c)lysosome d) nucleus  Click on post comments to answer.

The structure of the cell membrane is best described as what?  A phospholipid bilayer with many proteins embedded in it.

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What is the mass of typical cell?  Click on post comments to answer.

Which organelles are involved in cell division?  Click on post comments to answer.

What is the inorganic molecule that oxygen comes from in photosynthesis?  Water or carbon dioxide?

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What is meiosis?  Click on post comments to answer.

How different are the concepts of fermentation and cellular respiration?  Click on post comments to answer.

What is the cell nucleus?  A nucleus is what controls all the DNA in a cell.

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Who proposed the fluid mosaic model of cell membrane in 1972?  Click on post comments to answer.

Which kind of cell is most numerous?  Click on post comments to answer.

Which molecule is responsible for separating double stranded DNA into single strands?  DNA Primase?

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The following procress occurs at the beginning of glycolysis, in respiration...  ATP -> ADP + P -> Glucose -> Glucose Phosphate

For what purpose does this reaction take place?

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What prompts cells to divide?  Click on post comments to answer.

how does pH level affect cellular respiration?  Click on post comments to answer.

Organelle that are larger clear sacs that help regulate osmotic pressure?  Click on post comments to answer.

Describe what ATP is and its role in the cell.  Click on post comments to answer.

What is the function of a cell membrane?  Click on post comments to answer.

What does photosynthesis convert H2O and CO2 into?  Click on post comments to answer.

What does the interior portion of a cell membrane prevent?  Click on post comments to answer.

When a cell releases a signal molecule into the environment and a number of cells in the immediate vicinity respond, this type of signaling is called?  A: Paracrine Signaling
B: Endocrine Signaling
C: Autocrine Signaling
D: Typical Signaling
E: Synaptic Signaling

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Explain how a protein can be synthesized in the cytoplasm of a cell when the instructions for making the protein are contained in the nucleus.  Click on post comments to answer.

What is the number of ATP produced in human cell respiration in each type of cell?  Click on post comments to answer.

if a cell has completed the first meiotic division and is beginning meiosis II, which of the following is an appropriate description of its contents?  A) it has half the amount of DNA as the cell that began meiosis
B) it has the same number of chromosomes but each of them has different alleles than another ...

What products does a cell get out of glycolysis?  I'm kind of confused with this, so please help me!
Thank you!

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Who reads our DNA? Is that something material?  Apart from reading who is making the DNA of plants and animals?

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If the parent cell starts out with 24 chromosomes and undergoes mitosis, then how many will the daughter cell have?  Options A) 48 B) 12 C)5 D)24.

What is the reason behind formation of 70s ribosome from 50s and 30s?  Click on post comments to answer.

Where does the Krebs cycle occur?  Click on post comments to answer.

In which organelle does the alcoholic fermentation occur?  I think that it occurs in the cytoplasm.


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Why are centrioles in an angel position?  Click on post comments to answer.

What is C6H12O6 + 2CH3H20H + 2CO2?  Alcoholic fermentation?

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Why are chromosomes not condensed during some stages of the cell cycle?  Click on post comments to answer.

What is cell theory?  Click on post comments to answer.

What would happen to the glycolysis pathway if a cell runs completely out of ATP?  The cell would start to go through fermentation.

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What does it mean when scientists say that living organisms share a universal genetic code?   I'm really confused about this and my teachers aren't explaining it very well.

Note: Read our review on Protein Synthesis under Cell Biology, answer ...

Why are lysosomes abundant in phagocytic cells?  I don't know the answer, so if any could help me I'll be very glad.

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What is the difference between eukaryotic and prokaryotic cells?  Click on post comments to answer.

Vesicles are generally short-lived and are formed and recycled as needed. True or false?  Vesicles are generally short-lived and are formed and recycled as needed.

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What is the role of osmosis in the body?  What is the role of osmosis in the body?

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Which substances serve as electron carrier in cellular respiration?   NAD+...

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What is the process by which energy of sunlight is used to produce carbohydrates?  Photosynthesis uses sunlight.

What kind of pigment gets passed absorbed light?  This occurs in photosystem two in photosynthesis?

How does dna appear in a cell between cell divisions?  How does DNA appear in a cell between cell divisions?

How are mitochondria used in cellular respiration?  How are mitochondria used in cellular respiration?

What happens to subunits when they reach the typical cells and fat cells (growth)?  - Subunits are assembled into human
- proteins, carbohydrates and lipids in cells
- amino acids are used to build proteins
- glucose and other simple ...

If a cell has plasma membrane and the cell has membrane-bound organelles then what kind of cell is it?  I dont know.

During aerobic respiration in animals, where do ATP molecules form?  During aerobic respiration in animals, where do ATP molecules form?

How much ATP is needed for the human body to work properly?  How much ATP is needed to live?

How many membranes surround a chloroplast?  2?

If a gorilla had 48 chromosomes before meiosis, how many chromosomes would exist in each nucleus after meiosis I and then after meiosis II?   If a gorilla had 48 chromosomes before meiosis, how many chromosomes would exist in each nucleus after meiosis I and then after meiosis II?

A change in the genetic code of an organism is called?  Hi.

What are the functions of different cell organelles?  Tell the functions of different cell organelles.

In cell division what is the separation of the cell's cytoplasm called?  Is the answer telophase?

Note: No.

The oxidation of one molecule of NADH yields how many ATPs?  3.

What are examples and reasons for use of semi permeable or partially permeable membrane?  Separation of bacterias from viruses, purification of water...

If all 18 nucleotides in a particular sequence are translated, how many amino acids would be in the polypeptide?  Don't know.

Briefly distinguish between the two methods of producing ATP in respiration: substrate level phosphorylation and aerobic respiration.  I need help!

Why the aerobic respiration takes place inside the mitochondria?  ?

Why is the cell called the basic unit of life?  Discuss why the cell is called the basic unit of life.

What role does lysosome play in the metabolism of substances in the body?  Lysosomes.

Why can ribosomes outside of the nucleus make proteins when the nucleus is made of proteins?   The ribosomes gets it's proteins from the nucleus?

How to calculate net ATP in aerobic respiration?  36 ATPs produced?

The cell cycle is the period of growth and cell...?  The cell cycle is the period of growth and cell...?

What has four steps in cell divison?  What has four steps in cell division?

How do we use/release the other 62% of energy from glucose?  When you exercise that is why you feel warmer, but what if you are not exercising? What is the biological reason we sweat? Thanks!

What does ATP do for the cell?  What does ATP do for the cell?

Why does the cell need oxygen to maximize ATP production?  Can someone plz help.

If a cell contains 10 chromosomes, how many chromosomes wil each of the daughter cells contain?  Maybe 5 chromosomes each.

Some gland cells package hormones in vesicles which move to the cell membrane and release their contents to fluid outside the cell. This is an example of?   A. endocytosis B. phagocytosis C. Pinocytosis D.exocytosis

What is the main function of a selectively permeable cell membrane?  Storage of water?

When observing a cell under a microscope, which structure is the best evidence that the cell is a plant cell and not an animal one?  I think cell wall.

Do all cells store their chromosomes in the nucleus?  Yes, all cells store their chromosomes in the nucleus because it is a safe place for them.

What would it mean for a cell to be permeable, impermeable and semipermeable?  I have no clue...

in what ways are aerobic respiration and fermentation similar if the substrate involved is glucose?   ...

What is the molecule that is used more than it is produced during aerobic respiration and which it will produce a six carbon molecule?  G3P.

What are the general vocabulary terms in Biology?  I'm needing to know general vocabulary terms for Biology?

Note: Select from our sitemap.

What is not considered part of a cell's cytoplasm?  I need help.

What might happen if the amount of water entering and leaving the cell were not controlled?  ?

The equation for the two types of respiration are?  Pls, answer.

How does the prefix in- tell you which reactions in photosynthesis require light and which ones do not?  WHICH ONE REQUIRES LIGHT AND WHICH ONE DOES NOT REQUIRE LIGHT?

What are the kinds of fermentation?  ...

Contrast the cell division processes of mitosis and meiosis. Describe the major differences between the two processes and how the differences affect the end product.  Mitosis and meiosis have important similarities and differences.

If a cell has four pairs of chromosomes, how many different gametes can be produced through independent assortment?  2?

Besides glucose, what other kinds of molecules can be used to produce ATP in cellular respiration?  ADP.

Why is it difficult to observe vacuoles, cell membranes, mitochondria, ribosomes, and endoplasmic reticulum under compound light microscope?  I don't know.

Why are cells not counted in number?  Why are cells not counted in number?

How does the oxygen concentration in the cell affect glycolysis? How would this impact an aerobic culture of bacteria in a fermentor?  How would this impact an aerobic culture of bacteria in a fermentor?

What two compounds create ATP when oxygen is not present?  I have no clue.

What are the main ideas of chromosome and cell division?  What are the main ideas of chromosome and cell division?

Does the nucleus of a cell have DNA?  I think it does but im not 100% sure...

When you bleed internally, you can have bruised spots. What do they look like in shape and color? Do they appear on certain parts of the body?  Click on post comments to answer.

What is the general chemical equation of photosynthesis?  What is?

When does interphase occur, before or after mitosis?  Ok.

What are the 3 phases of the aerobic cellular respiration process?  What are the 3 phases of the aerobic cellular respiration process?

Where do the ATP molecules produced during aerobic respiration go?  Do they remain in the mitochondria, are stored in chloroplasts of the same cell in which they are formed, enter the cell's cytoplasm through the membranes ...

Do aerobic and anaerobic solutions both create CO2?  Yes, they both do.

In what type of cell does division take place? What is the purpose of division?   Please HELP.

Note: Read our Cell Division page.

What is one reason why some molecules can pass through a certain membrane, but other can not?  Starch?

What do hydrogen ions pass through and causes it to spin and produce ATP?  ?

In what groups of animals do we find intracellular digestion?  Phylum.

What are specific examples of substances that are moved by facilitated diffusion and active transport?  Facilitated diffusion requires no energy while active transport does.

When does reduction division take place?  I believe its meiosis II.

In what part of the cell does the division take place?  In the chromatids.

What is the difference between respiration and expiration?  Breathing, lungs.

Does the intercellullar space in plants contain a fluid?  I do not think it does.

How is the information that directs protein synthesis stored in DNA?  a. in the arrangement of the phosphate groups

b. in the order of the nitrogenous bases

c. in the nucleosomes that are complexed to the DNA

d....

What process do you think occurs in cells that produces hydrogen peroxide?  They breakdown?

What are the phases of cellular respiration and where they occur in the cell?  What are the phases of cellular respiration and indicate where they occur in the cell.

How to determine if a new venom inhibits the citric acid cycle or the electron transport system?  Please explain. Thanks a lot.

What does aqueous solution mean?  A solution...

What is the difference between a cell membrane and a stone wall?  The difference between a membrane and a stone wall is that the wall is the outside that keeps the wall staning and the cell membrane is the inside that ...

What happens to people when they are born with twice as many mitochondria?  Please, answer.

How many meiotic divisions are required to form 1000 daughter cells?  Please mention the formula required to find the answer.

When does fermentation alone occur?   Fermentation occurs when there is no oxygen present.

What would happen to a cell without the nucleolus?  What would happen to the cell if the nucleolus was to die?

A cell with a nucleus is a...?  A cell with a nucleus is a?

To go around the Calvin Cycle 3 times, how many 5-Carbon RuBP molecules are needed?  To go around the Calvin Cycle 3 times, how many 5-Carbon RuBP molecules are needed ?

How would you define the events of prophase of mitosis?  In prophase of mitosis the chromatin materials get condensed by folding and the chromosome appears as thin threads at the begning of prophase .

How does meiosis take place?  Meiosis process.

What would happen if the cell had no cell membrane?  No cell membrane.

What is the difference between centrosome and centromere?  ?

What are the 2 types of final stages in fermentation?  Alchoholic fermentation & lactate fermentation.

What is the first step in CAM photosynthesis?   Photosynthesis.

What is the structure and function of the nucleus?  Nucleus.

Describe each of the following in relation to cellular energy: glucose, atp, phosphate bonds.  cellular respiration.

Where is the Golgi body in a cell compared to the ER?  Where are the ER and Golgi bodies?

What is NADP?  Nicotinamide adenine dinucleotide phospate?

What happens if the product in the first subpathway cannot move into the mitochondrian? What are some examples?  Do you mean in cell respiration?

When, where, how the 38 atp molecule are formed during aerobic cellular respiration?  Oxygen is consumed...

What is the reaction of cellular respiration?  I'm not quite sure I understand the question.

Why are cells stained ?  To better conciever cells and cell components under a microscope.

The plasma membrane has a double layer of phospholipids with what dispeared throughout?  Is it carbon, phosphorus, fats, or protein?

What are nonmembrane-bound organelles in the nucleus called?  ?

What are nonmembrane-bound structures within eukaryotic cells?  ?

What type of cells carry out aerobic cellular respiration?  What type of cells carry out aerobic cellular respiration?

What is cellular digestion?  What is cellular digestion?

Why does the mass of a cell change, when it is placed in different solutions?  Some one help me!

What are the kinds of cell respiration?  I realy realy need this answer so please if anyone knows this please answer it!

Does pyrenoid contain proteins and starch?   Well they may contain both of them.

I did an experiment to compare rate of respiration of yeast with different substrates.Why the rate of gas released with yeast in water is faster than that in starch solution?  I guess that yeast can respire in water only with the endogenous substrate. But I can't understand why the rate of it is faster than that with starch.

What are the steps in passive transport?  Hey is any one in debate?

What are two conditions which are necessary for a substance to enter a cell by diffusion?  Really confused on the answer, is it to do with temperature?

Why do cells prefer cellular respiration to fermentation?  Hope anyone can help.

What are motor proteins and how do they relate to the cytoskeleton?  ATP powered movement along the cytoskeleton...