The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
1answer
11 views

Role of Intermediate Filaments in cell - cell signalling

A passage in my textbook mentions briefly that the role of intermediate filaments in the cytoskeleton is to enable cell to cell signalling by extending between special junctions and alowing cells to ...
0
votes
1answer
31 views

Why do sperm have centrioles? and do female eggs cells even have centrioles?

I was just wondering why it is that sperm have centrioles underneath the acrosome, but that also prompted a thought as to whether eggs have them too? Thanks.
1
vote
2answers
46 views

At which end does polymerization of microtubules occur?

My book says that polymerization and depolumerization of microtubules occurs on the + end however, I've found a note that says that depolymerization occurs on the - end. I need help please :) thank ...
10
votes
1answer
742 views

How is centriole number maintained during meiosis?

I've found a website (Pearson's BioCoach) that claims centrioles duplicate in Prophase II. Is this accurate? Does it depend on the species in question? Looking at three textbook illustrations of ...
1
vote
1answer
396 views

How do the homologous chromosomes pair up and position themselves along the center of the cell? [closed]

I am not sure... Most textbooks just state "they line up" but I don't know how... Something to do with the cytoskeleton or microtubules? Thanks for any help
5
votes
2answers
113 views

Cytochalasin B in cell movement

In an experiment by Pollard, T.D. and R.R. Weihing, amoeba cells injected with Cytochalasin B were inhibited of movement, while the control group amoeba cells did move. A hypothesis was made that ...
4
votes
2answers
300 views

Breakdown of energy expenditure at the level of a single cell

The metabolic rate measures how much energy an organism expends over a unit of time. Its breakdown for the human body in terms of its functions is well documented : so much for the heart, for the ...
1
vote
1answer
82 views

Why can't intermediate filaments be used as tracks by motor proteins?

A motor protein like kinesin-1 cannot use an IF as a track because it lacks polarity. Can someone elaborate on this answer?
4
votes
1answer
42 views

What are the effect of microtubule or microfilament inhibition on yeast expression profile?

I was wondering whether anyone has looked at what are the expression changes in yeast when the microtubule or the microfilament polymerization is inhibited? Have there been whole-genome studies?