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During the light-independent reaction of photosynthesis, carbon dioxide is converted into organic substances. Describe how. (6marks)

Carbon dioxide from the atmosphere diffuses into the leaf through stomata and reaches stroma of chloroplast. In stroma, carbon dioxide combines with ribulose biphosphate (RuBP) in the presence of an enzyme c...
MC
Answered by Meral C. • Biology tutor
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Explain how partial pressure of oxygen affects how oxygen binds to haemoglobin in different areas of the body.

In the lungs, the partial pressure of oxygen is high therefore haemoglobin readily binds to the oxygen. This causes the haemoglobin to undergo a conformational change and increase its affinity for oxygen so ...
VA
Answered by Vinisha A. • Biology tutor
6607 Views

How does the structure of the heart relate to its function?

The easiest way to understand the way that the heart works is to imagine a double pump with high pressure and low pressure tubing. One part of the pump is low pressure all the way, and that brings the blood ...
MG
Answered by Mark G. • Biology tutor
5220 Views

Describe what happens when an action potential reaches an axon terminal.

When an action potential reaches an axon terminal, the depolarisation from causes voltage-gated calcium ion channels in the plasma membrane of the synaptic knob to open. As there is a much higher concentrati...
SJ
Answered by Sian J. • Biology tutor
14572 Views

What is homeostasis and give an example

Homeostasis is the physiological process of maintaining a condition such as temperature or chemicals in a normal range despite changes that occur everyday in the body. Usually, this is regulated by hormones ...
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Answered by Carolina B. • Biology tutor
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