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Describe the secondary and tertiary structure of a protein

The secondary structure of a protein refers to the folding or coiling of a protein. There are 2 main secondary structures. 1) alpha helix – this is held ...

Answered by Megan L. • Biology tutor

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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 b...

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.<...

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 coi...

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...

Answered by • Biology tutor

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