Top answers

How does pH affect the rate of reaction on an enzyme?

Optimum pH for enzymes in the human body is 6. It's a bell shaped Graph. At Higher or lower pH, the alkalinity/acidity denatures the enzyme, which changes the shape of the active site, and so the substrate c...
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Answered by Max H. • Biology tutor
11949 Views

Describe the process which is used by plants to make food?

All living things need food to survive. However, plants cannot nip down to tesco to buy themselves a pizza, instead they make their own food. This process is called photosynthesis. Plants take in carbon diox...
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Answered by Faye B. • Biology tutor
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Describe the similarities and differences between DNA and RNA structures

Structurally, DNA and RNA are very similar. They're both composed of a backbone of sugar, a phosphate group and a chemical base. However, the sugar in DNA is a deoxyribose sugar and the sugar in RNA is a rib...
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Answered by Shannon M. • Biology tutor
10341 Views

How can white blood cells defend against pathogens? (Give 3 ways)

White blood cells (WBC) are like our body's guards patrolling our blood to look for any pathogens (bacteria and virus).WBC kills pathogens in the following ways before pathogens make us ill. Eating them : WB...
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Answered by Yvonne L. • Biology tutor
44774 Views

What are the differences and similarities between animal cells and plant cells in terms of structure and function?

Animal cells and plant cells similarities: Structure Both animal and plant cells contain a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes.Both animal and plant cells are eukaryotic (i.e. conta...
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Answered by Mariyum K. • Biology tutor
20894 Views