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Explain how a mutation can cause cancer.

Proto-oncogenes and the tumour suppressor genes are the two different genes that control cell division. A mutation in the tumour suppressor gene can cause it to deactivate because tumour suppressor genes enc...
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Answered by Gina S. • Biology tutor
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Why is the actual yield of ATP during aerobic respiration lower than the theoretical yield of 38 ATP molecules?

Although the theoretical yield can be up to 38 ATP molecules per molecule of glucose, this yield is very rarely achieved. It is important to consider at which stages the losses of ATP occur and why . Once 2 ...
MT
Answered by Milton T. • Biology tutor
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What is the electrical conducting pathway through the heart?

The heart is myogenic meaning that impulses (action potentials) are stimulated from the pacemaker cells of the heart. These action potentials are initiated from the sinoatrial node (SAN) which are a cluster ...
MC
Answered by Mursaleen C. • Biology tutor
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Arteries carry blood away from the heart whereas/or veins carry blood towards the heart.M2: Arteries have much thicker walls than veins (due to the thicker muscle and elastic layers) M3: Veins tend to have valves (this prevents backflow)

Arteries carry blood away from the heart whereas/or veins carry blood towards the heart.M2: Arteries have much thicker walls than veins (due to the thicker muscle and elastic layers) M3: Veins tend to have v...
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Answered by Aisha A. • Biology tutor
4867 Views

What is the composition of blood?

Blood consists of 4 different elements: 55% is PLASMA other 45% are 3 different components: red blood cells white blood cells platelets The main components we will focus on today are: white blood cells. If y...
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Answered by Alisha J. • Biology tutor
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