Top answers

Biology
A Level

Difference between prokaryote and eukaryote?

Prokaryotes do not have a membrane bound nucleus, eukaryotes do.

Prokaryotes have plasmids.

Prokaryotes have smalled ribosomes than eukaryotes.

Eukaryotes have...

LD
Answered by Laurence D. Biology tutor
3770 Views

Describe blood supply to the liver?

The liver is supplied by the hepatic artery bringing oxygenated blood to it. The liver is also supplied by the hepatic portal vein. This brings the absorbed nutrients from the small and large intestine...

LD
Answered by Laurence D. Biology tutor
5201 Views

What is a zymogen giving reference to an example?

A zymogen is the inactive form of an enzyme. For instance the enzyme pepsinogen is produced by chief cells in the gastric pits. Pepsinogen is a zymogen. Hydrochloric acid produced by the parietal cells...

LD
Answered by Laurence D. Biology tutor
7088 Views

What are the two main secondary structures of proteins?

Alpha helices and Beta pleated sheets. 

UY
Answered by Umamah Y. Biology tutor
3472 Views

What is an enzyme and what effect does temperature have on enzyme activity? (6 marks)

An enzyme is a globular protein that acts as a biological catalyst.  They work by reducing the activation energy of chemical reactions, which increases the rate of reactions.

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IO
Answered by Isabel O. Biology tutor
14965 Views

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