Top answers

Biology
A Level

Describe the stages in DNA transcription and translation

First DNA helicase unwinds the strand of DNA. Then, DNA polymerase binds to the anti-sense strand of the DNA and adds RNA nucleotides in a sequence complementary to the strand of DNA. The DNA polymerase c...

IN
Answered by Iona N. Biology tutor
2700 Views

How does Acetylcholine act on a neuronal synapse, and how is it re-uptaken?

 - Ca2+ voltage gated channels are activated due to an action potential reaching the synapse

 - Acetylcholine rests in the pre-synaptic cleft

 - They are stored in vesicles

 - The cal...

KR
Answered by Krishan R. Biology tutor
2221 Views

Outline the process of mitosis

Meiosis is the process of cell division that produces two identical diploid cells, and consists of four stages.

The first stage is called prophase, where the chromosomes condense and cross over to ...

AR
Answered by Anastasia R. Biology tutor
5069 Views

How does the hormone ADH control urine output?

ADH is a hormone that decreases the urine output in humans. It is produced by the hypothalamus and secreted by the posterior pituitary gland. The production is controlled by osmoreceptors and baroreceptor...

BF
Answered by Ben F. Biology tutor
2610 Views

Describe and explain the function of the cell membrane?

The cell membrane consists of a mosaic of proteins and a phospholipid bilayer, with the hydrophobic fatty acid tails orientated inwards and the hydrophilic phosphate heads outwards. The main function is t...

TD
2586 Views

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