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Explain the structure of cellulose

Cellulose is a linear polysaccharide polymer with many glucose monosaccharide units. The linkage is beta, which makes it different from starch. This difference results in a major different in digestibility i...
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Answered by Sarika G. • Biology tutor
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Some phenotypes, such as colour-blindness, are caused by sex-linked genes. Explain why colour-blindness is more common in men than in women

Sex-linked genes are located on the sex-chromosomes, X and Y. Females have two X-chromosomes, XX, and males have one X and one Y-chromosome, XY. The X-chromosome is much larger than the Y-chromosome and so c...
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Answered by Zoe N. • Biology tutor
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Describe protein synthesis

Firstly, DNA is transcripted into mRNA inside the nucleus, controlled by RNA polymerase. The DNA is unwound by RNA polymerase into two strands. There is complimentary base pairing between the template strand...
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Answered by Sarah F. • Biology tutor
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Compare and contrast the structures and starch and cellulose and explain how these relate to their functions in the cell

Both are biological polymers (macromolecules) formed from glucose molecules joined by 1-4 glycosidic bonds.Both are insoluble: good for starch as it does not affect the osmotic potential of the cells in whic...
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Answered by Eleanor R. • Biology tutor
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Describe the events of synaptic transmission

An action potential travels towards the synaptic terminal down the axon in a wave depolarisation. The voltage gated calcium channels on the membrane of the presynaptic bulb open causing an influx of calcium ...
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Answered by Georgie H. • Biology tutor
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