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Biology
A Level

Compare the structure and properties of phospholipids and triglycerides

Both have ester bonds. Ester bonds are formed between glycerol and fatty acids Both contain glycerolFatty acids can be either saturated or unsaturated in both structures. Saturated fatty acids do not have...

Answered by Kiman L. Biology tutor
7527 Views

How does genetic variation occur in meiosis?

There are three ways that the cells produced in meiosis are different from each other and from the parent cells:1) Independent assortment: this is the idea that during metaphase 1 and 2 pairs of homologou...

Answered by Amy L. Biology tutor
6304 Views

How do I tackle questions that seem only vaguely related to the course I've covered?

These questions are particularly stressful, because they seem completely random. But the most important thing to do is relax and think back to your syllabus. Can you make any links to the topic at hand an...

Answered by Juliet S. Biology tutor
2114 Views

Explain how an action potential is propagated across a synapse in a muscles (3 marks)

Any three of the following, in the correct order.
Action potential arrives at the pre-synaptic membrane Causes the voltage gated Ca2+ channels in the pre synaptic terminal to openCa2+ enters the pre ...

Answered by Biology tutor
2083 Views

Why does the haemoglobin dissociation curve shift to the right when an individual exercises.

The concentration of carbon dioxide in a persons bloodstream rises during exercise. The carbon dioxide molecules interact with substances in the bloodstream to form carbonic acid. This causes the blood to...

Answered by Biology tutor
2706 Views

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