206 Answered Questions for the topic Cell Biology

Cell Biology Science Biology


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


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


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


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?


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


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


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


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.


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


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


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


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


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


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


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


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


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


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


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


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


Are centrioles really absent in human neurons?

A booklet (issued by my school) claims, Centrioles, formerly believed to be absent in neurons, have been described in neurons and may be associated with the production and maintenance of... more


Where do plants get their food?

I am wondering how plants like pond lillies survive in the water without being in the ground.
Cell Biology Biology Human Biology Death


Will neurons die if they are inactive for a long time?

We know that when muscles are not used they atrophy. Does something similar also happen in neurons if they do not receive any stimulus?
Cell Biology Biology Evolution Virus


How did viruses learn to utilize the workings of a cell?

This is my first post here, so excuse me for its simplicity.Viruses can infiltrate a cell, overtake it and multiply. It has projecting fibers whose ends are shaped as kind of a "key" to a mobile... more
Cell Biology Biology Cancer


Expression/Mechanism of ROR1 in healthy tissue?

ROR1 is currently under investigation as a therapeutic target for cancer (1). A number of studies show different cancers may have their metastatic potential reduced, or become apoptotic through... more
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