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Explain how polymerase chain reaction is used in DNA fingerprinting

DNA extracted from a crime scene is normally available in small quantities so PCR can be used to amplify this quantity to a reasonable concentration which can then be used to run a gel electrophoresis to ide...
NS
Answered by Nikita S. • Biology tutor
17108 Views

How is blood pumped around the heart and to the body?

The pumping of the heart is split into two main phases, diastole (relaxation) and systole (contraction) and involves the four main chambers of the heart, the atria and ventricles, as well as the associated v...
RJ
Answered by Rhiannon J. • Biology tutor
3292 Views

Explain how gaseous exchange occurs in the lungs

Oxygen enters the nose/mouth along the trachea, bronchi, bronchioles and finally into the alveoli.The exchange of gases occurs between the alveoli and blood in the capillaries that supply the lungs. Capillar...
TD
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Explain how the formation of glycogen in liver cells leads to a lowering of blood glucose concentration.

In hepatocytes, glycogenesis occurs where glucose is converted to glycogen. This causes a decrease in glucose concentration in the cell in comparison to the plasma thus maintaining a concentration gradient. ...
ZA
Answered by Zubair A. • Biology tutor
10633 Views

What is the role of mitosis in organisms?

Mitosis is the process where one cell duplicates and splits into two completely identical daughter cells. This can be useful in a number of situations in an organism:Growth and repair of tissues is achieved ...
JH
Answered by Jessica H. • Biology tutor
3242 Views