215 Answered Questions for the topic Cell Biology

05/30/21

what happens to mitochondrial respiration when there is an increase in permeability of the inner mitochondrial membrane to protons

What would happen to the mitochondrial proton gradient, mitochondrial respiration (mitochondrial oxygen consumption), and the NADH oxidation rate in cells treated with carbonyl... more
Cell Biology

03/24/21

Can't Metaphase be classified as the shortest stage in mitosis?

I know Anaphase might be classified as the shortest. But I want to know if Metaphase can't also be classified as the shortest? And also why for any reason you give?
Cell Biology Osmosis

02/01/21

Osmosis - Estimating the water concentration of red onion epidermal cells

An investigation was carried out to estimate the water concentration of red onion epidermal cells. Pieces of epidermis were covered with a drop of salt solution on a microscope slide. After 5... more
Cell Biology Science Biology

12/09/20

Name at least three targets molecules that get phosphorylated

Name at least three targets molecules that get phosphorylated by mitotic Cdk after its activation by the appropriate cyclin at the onset of mitosis (prophase)Then, describe the specific changes in... more
Cell Biology Science Biology

12/09/20

What are the two major mechanisms through which cell signaling leads to a change in cell behavior?

What are the two major mechanisms through which cell signaling leads to a change in cell behavior?
Cell Biology Science Biology

12/09/20

How would you expect intracellular signaling to be altered in cells that have been infected with cholera compared to non-infected cells?

How would you expect intracellular signaling to be altered in cells that have been infected with cholera compared to non-infected cells?
Cell Biology

05/05/20

Mitochondrial pyruvate in mice

Mitochondrial pyruvate carrier 2 resides in the inner membrane of mitochondria. Due to a genetic defect in a type of mouse cell that protein no longer stays in the inner membrane of mitochondria.... more
Cell Biology Botany Photosynthesis

08/07/19

Import of H+ ions into the thylakoid space during photosynthesis in plants?

Why are H+ ions pumped into the thylakoid space as the electrons pass through the cytochrome complex from PS2 to PS1 during photosynthesis?

08/06/19

Is "reaction center" the same as "photosystem"?

I have a diagram which labelled a part of PSI (Photosystem I) as *"reaction center"*. But I have read on several websites that the reaction centers are PSI (the whole complex, not just a part of... more

08/05/19

Can I kill bacteria with distilled water?

Given that bacteria are hypertonic (contain more salts) compared to distilled water, and that they rely on ion concentration differences across the plasma membrane to survive, can I kill a... more

08/02/19

What is the purpose of co-transport?

My current understanding of co-transport is that, first, a substance is actively transported across a membrane, establishing a concentration gradient across said membrane. This same substance then... more
Cell Biology Biology

08/01/19

Are there oligocellular organisms in nature and, if so, what are they like?

I'd think protozoans can be oligocellular, but I haven't found any examples, and I'm curious to know what is the minimum number of cells an organism can have other than a single cell.

07/31/19

Cell cycle selection?

Is it possible to select from colonies only cells which are at a certain stage in the cell cycle? E.g. if I was trying to analyse expression of a number of genes during different stages of the cell... more

07/31/19

Is scalable growth the main reason why Darwinian systems select Fibonacci sequences?

The other day I was thinking about evolution of multi-cellular organisms, and why from the earliest onset of the development of communal cellular structure building, life may have selected a... more

07/30/19

What does “energy transfer in cells” mean?

ADP and ATP are involved in energy transfer in cells. I know what is ATP and I know how ADP is formed, but I don’t understand what “energy transfer in cells” means.
Cell Biology Biology Lab Reagents

07/30/19

Reason for the source of fetal bovine serum?

What is the reason that perhaps the most commonly used serum in labs is fetal bovine derived? Is there something about fetal serum that is particularly useful over say serum just harvested... more
Cell Biology Biochemistry Evolution

07/29/19

Are there any multicellular forms of life which exist without consuming other forms of life in some manner?

The title is the question. If additional specificity is needed I will add clarification here.Are there any multicellular forms of life which exist without requiring the consumption (destruction) of... more
Cell Biology Biochemistry

07/29/19

Are the cytosol and extracellular fluids electrically neutral?

I've found several sources that state that overall, the cytosol of a cell is electrically neutral. The extracellular fluid is also purportedly electrically neutral. How can that be when we have... more
Cell Biology Botany Plant Physiology

07/29/19

How long will a vegetable live for after being harvested?

I understand this might depend on the types of vegetables, but is there an average or studied specifics? Does it die immediately? Is there a way to precisely diagnose death in plants? If so, what... more

07/27/19

How does formaldehyde/PBS or methanol fixation of cells affect lysosomal pH?

**The question** is fairly simple - does formaldehyde or methanol fixation in preparation for immunocytochemistry/immunofluorescent staining affect the pH of the lysosomes?**Some background:** I'm... more
Cell Biology Biology Biophysics

07/25/19

Role of microvilli in cell volume regulation?

Does the presence of microvilli on a cell's surface ensure that it's more resistant to cell swelling or lysis in a hypotonic solution, as compared to a normal cell?
Cell Biology Biology Cell Membrane

07/25/19

How do detergents get in hydrophobic membrane interior?

According to *Molecular And Cellular Biology* (Stephen L. Wolfe), Membranes disperse almost instantaneously if exposed to a nonpolar environment or to detergents, which are amphipathic molecules... more
Cell Biology Biology

07/25/19

Which cells are responsible for the extracellular matrix remodeling?

I am studying a case of tendinopathies induced by an alteration of how the extracellular matrix is being remodeled. From my understanding there has to be a careful balance of MMP... more
Cell Biology Biology Hearing

07/25/19

Is the ringing sound in the ears caused by dying ear cells?

I was recently watching the movie "<a href="http://www.imdb.com/title/tt0206634/">Children of Men</a>" (great movie) by Alfonso Cuarón. Now in a certain scene, the lead actor happens to... more

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