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Explain the role of each enzyme involved in DNA replication.

DNA replication involves the action of numerous enzymes. These are: DNA Helicase, DNA Gyrase, Single Stranded Binding Proteins, DNA Primase, DNA polymerase III, DNA polymerase I, DNA Ligase.DNA Helicase brea...
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Answered by Sarah P. • Biology tutor
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Explain the different functions of the components of a plant cell.

Functions of plant cell organelles Cell membrane: Controls the movements of substances in and out of the cell Cytoplasm: thick substance where chemical reactions occur. Nucleus: contains the genetic informat...
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Answered by Imogen L. • Biology tutor
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What is the difference between DNA and RNA?

-DNA (Deoxyribose nucleic acid) is a structure made up of a sugar-phosphate backbones linked to one of four chemical bases (adenine, thymine, guanine or cytosine) DNA has a double helix structure that coils ...
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Answered by Benjamin M. • Biology tutor
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Explain how the heart muscle and the heart valves maintain a one-way flow of blood from the left atrium to the aorta

The left atrium has a higher pressure than the left ventricle due to the atrium filling with blood and contractingThis causes the atrioventricular valves (the mitral/bicuspid valve in the left side of the he...
Answered by • Biology tutor
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Why does a myelinated neurone have a faster conduction time than unmyelinated neurones?

Myelination allows saltatory conduction to occur, which is when the impulse 'jumps' along the axon using the nodes of Ranvier. The myelin also acts as an electrical insulator.
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Answered by Sasha H. • Biology tutor
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