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What is the difference between aerobic respiration and anaerobic respiration?

Respiration is the process by which the body creates energy by breaking down nutrients. This can either happen in the presence of oxygen, or without it. The key difference between the two processes are that ...
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Answered by Alex W. • Biology tutor
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What are the similarities and differences between animal and plant cells?

Similarities : Both have a nucleus Both have cytoplasm Both have a cell membrane Both contain mitochondria Both contain ribosomes Differences : Plant cells have a cellulose cell wall Plant cells have a vacuo...
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Answered by Phoebe W. • Biology tutor
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Describe the structure of DNA

DNA is the molecule within cells that contains genetic information, in the form of a sequence of bases that form a code that makes up a protein. DNA is a polymer, meaning that it is a macromolecule (large mo...
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Answered by Emma H. • Biology tutor
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how is urine produced in the kidney?

The first step of urine formation is ultrafiltration. Blood passes through a network of capillaries in the kidney called the glomerulus. It is filtered into the Bowman’s capsule (the first part of the nephro...
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Answered by Lois C. • Biology tutor
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What is an enzyme?

An enzyme is a protein catalyst . A catalyst is a substance which alters the rate of a chemical reaction. (So it can speed up a chemical reaction). The key thing about an enzyme is that it is not itself chan...
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Answered by Lauren D. • Biology tutor
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