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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 more organelles than prokaryotes. I.e. eukaryot...
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Answered by Laurence D. • Biology tutor
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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 to th...
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Answered by Laurence D. • Biology tutor
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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 of th...
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Answered by Laurence D. • Biology tutor
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What are the two main secondary structures of proteins?

Alpha helices and Beta pleated sheets.
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Answered by Umamah Y. • Biology tutor
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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. All enzymes have an optimum tempe...
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Answered by Isabel O. • Biology tutor
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