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Explain the post-transcriptional changes that occur in mRNA before translation.

After DNA has been transcribed into mRNA but before is it is translated into it's polypeptide amino acid chain, post-transcriptional changes take place.DNA, and therefore its corresponding mRNA are made u...

Answered by Ellen C. • Biology tutor

2379 Views

Describe how phagocytosis of a virus leads to the secretion of an antibody against this virus antigen.

Phagosome/vesicle fuses with lysosome;(Virus) destroyed by lysozymes/hydrolytic enzymes;Peptides/antigen (from virus) are displayed on the cell membraneHelper T cell/TH cell binds to the antigen (on the a...

Answered by Victoria G. • Biology tutor

2817 Views

Suggest and explain two ways the cell-surface membranes of the cells lining the intestine may be adapted to allow rapid transport of nutrient

Membrane has increased/large surface area for (fast) diffusion/facilitated diffusion/active transport/co-transport;Large number of protein channels/carriers (in membrane) for facilitated diffusion;Large n...

Answered by Victoria G. • Biology tutor

3058 Views

How does the body control blood sugar

In order to maintain homeostasis, which in this case means a stable blood glucose, certain hormones must be released in situations which alter blood glucose. This occurs most commonly after a meal (increa...

Answered by Georgie W. • Biology tutor

2033 Views

If someone has blood type A+: which are his possible genotypes and who can he donate blood to?

The ABO blood type system relies upon the co-dominant alleles I^Aand I^B, which are expressed any time they are present and are dominant over i which is recessive. If someone has bloo...

Answered by Francisco T. • Biology tutor

36381 Views