Top answers

Biology
A Level

What are the 4 phases of mitosis?

Prophase, metaphase, anaphase, and telophase.

Answered by Biology tutor
5888 Views

What is the structure of a protein?

Proteins are long chains of amino acids connected by peptide bonds. The structure of proteins is broken down into 4 components. The primary structure of a protein is simply the order of amino acids found ...

Answered by Richard N. Biology tutor
1991 Views

Describe semi-conservative DNA replication

The double helix structure unzips which is catalysed by the DNA Helicase enzyme. DNA Helicase overcomes hydrogen bonding between nitrogenous bases. Two strands are produced, each one acts a template. Free...

Answered by Prashant A. Biology tutor
4076 Views

Explain how pressure differences in the heart ensure sufficient pumping of blood into the arteries. (3)

increased pressure in the ventricles the pressure in the ventricles is higher than the pressure in the atria causing the atrioventricular valves to closecausing the semilunar valves to open and the blood ...

Answered by Kelly W. Biology tutor
3357 Views

Define antibodies and antigens, and describe the different ways in which the body develops immunity.

Immunity is the capacity of the body to recognise the intrusion of disease-causing microorganisms (pathogens) and develop a response to fight infection. Antigens and antibodies are crucial to the process ...

Answered by Charlotte B. Biology tutor
2332 Views

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