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Biology

A Level

In DNA, if you know the percentage of a base on 1 strand, how do you work out the bases on the opposite strand?

This questions requires knowledge of the base pairing in DNA, plus a little bit of maths! As you know, bases on the 2 DNA strands always pair in the same way: A (adenine) with T (thymine) , C (cytosine...

Answered by Eleanor B. • Biology tutor

14752 Views

what are the differences between involuntary, cardiac and voluntary muscle?

Involuntary muscle (or smooth muscle) is innervated by the autonomic nervous system and therefore is not under conscious control. It is not st...

Answered by Dani E. • Biology tutor

50741 Views

How are signals transmitted across the synaptic cleft?
When the action potential reaches the synaptic knob it causes voltage-gated calcium ion channels to open, allowing calcium ions to diffuse in.

These calcium ions cause
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Answered by Dani E. • Biology tutor
4486 Views
A guanine is swapped for a thymine in a gene sequence. Explain how this may alter the function of the protein it translates.
The alteration in the nucleotide sequence of the gene may result in a change in the amino acid sequence of the protein during translation. Each set of three RNA nucleotides (anticodon) is recognised by...
MD
Answered by Matthew D. • Biology tutor
4311 Views
Compare and contrast the similarities and differences between meiosis and mitosis.
Both are forms of cell division.Both are used during gametogenesis (formation of gametes or sex cells such as spermatozoa and oocytes).Only mitosis is used during cell division of somatic or body cells.Me...
SP
Answered by Sally P. • Biology tutor
38288 Views
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Top answers

In DNA, if you know the percentage of a base on 1 strand, how do you work out the bases on the opposite strand?

what are the differences between involuntary, cardiac and voluntary muscle?

How are signals transmitted across the synaptic cleft?

A guanine is swapped for a thymine in a gene sequence. Explain how this may alter the function of the protein it translates.

Compare and contrast the similarities and differences between meiosis and mitosis.

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