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Why does glucose pass into the kidney but red blood cells and protein do not?

Each kidney contains 1000s of nephrons and this is where a process called ultrafiltration occurs. Blood from the renal artery flows through the glomerulus at high pressure. The glomerulus is a bundle of c...

Answered by Lottie T. Biology tutor
5505 Views

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 s...

Answered by Zoe N. Biology tutor
8699 Views

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 str...

Answered by Sarah F. Biology tutor
2539 Views

What is the difference between mitosis and meiosis?

Both mitosis and meiosis are methods of cell division. Mitosis is cell division where the DNA of the parent molecule is duplicated then split into 2 identical daughter cells. Mitosis is split into 4 stage...

Answered by Pavan C. Biology tutor
2090 Views

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 w...

Answered by Eleanor R. Biology tutor
20326 Views

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