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B Cell

A lymphocyte derived from bone marrow that provides humoral immunity; it recognizes free antigen molecules in solution and matures into plasma cells that secrete immunoglobulin (antibodies) that inactivate the antigens.


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Need some help with a question

In the cell cycle, at which stages do two chromatids make up one chromosome? (Can be multiple answers) a. beginning of mitosis b. end of G1 phase c. beginning of S (Synthesis) d. end of mitosis e. beginning of G2 phase

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by nillkill
Sat Mar 22, 2014 5:49 pm
 
Forum: Cell Biology
Topic: Need some help with a question
Replies: 0
Views: 31

genetic

) A diploid cell contains three pairs of homologous chromosomes designated C1 and C2, M1 and M2, and S1 and S2. No crossing over occurs. a. What combination(s) of chromosomes are possible in daughter cells following mitosis? b. ...

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by lachatausa
Fri Mar 21, 2014 2:55 am
 
Forum: Genetics
Topic: genetic
Replies: 0
Views: 36

Transpiration and Photosynthesis.

Seriously? Do you have any idea, what is the concentration of water? Even if we assume that the cell is crowded, I'm sure the metabolism doesn't significantly influence concentration of water. Shouldn't be the question the other way - how does transpiration affect photosynthesis?

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by JackBean
Fri Mar 14, 2014 10:34 am
 
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 3
Views: 212

Re: are biological mushrooms with virus combinable?

The ovum can be considered as single-cell fungi. And sperm - as a virus. ....... In the human body arise other ovum-like cells. They can give rise to cancer, but to cause hermaphroditism if they meet with the "viruses".

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by enarees
Thu Mar 06, 2014 3:14 am
 
Forum: Microbiology
Topic: are biological mushrooms with virus combinable?
Replies: 5
Views: 305

Who made the theory about how the first cell came to be?

I'm wondering if anyone knows who made the theory about how the first cell or mitochondria came to be? I mean the theory that the first cell or mitochondria was made by chemical processes and other natural phenomenon. Does anyone has his or her name, and perhaps ...

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by Anonymous99
Wed Mar 05, 2014 10:42 pm
 
Forum: Molecular Biology
Topic: Who made the theory about how the first cell came to be?
Replies: 0
Views: 68
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