Top answers

Biology
A Level

How is the tertiary structure of an enzyme important to its function?

The tertiary structure involves four types of bonds being made between secondary alpha helices or beta pleated sheets. These are disulfide bridges, hydrophilic/hydrophobic bonds, ionic bonds and hydrogen ...

JB
Answered by Jessica B. Biology tutor
15845 Views

What are the main differences between RNA and DNA molecules?

When it comes to structure single strands of DNA and RNA are highly similar. However, there are few major differences which reflect the different functions of these molecules. Namely, DNA acts as a geneti...

TR
Answered by Ted R. Biology tutor
2478 Views

Outline the process of neuronal communication between two neurones

Ensure that your answer is precise, without too much waffle - this can confuse examiners and you'll lose easy marks! Take it step by step:
First, the neurotransmitter, acety...

EW
Answered by Ellie W. Biology tutor
2210 Views

What is the role of adrenaline in glucoregulation?

Although a lot of the time this can seem like a daunting question as there's a lot of specific terminology to use and a variety of reactions/interactions occurring, by splitting it up into short, simple s...

EC
Answered by Ellie C. Biology tutor
2630 Views

Describe how mRNA is produced in the nucleus of a cell

Helicase (an enzyme) breaks the hydrogen bonds between the DNA resulting in two strands. Only one strand acts as a template. RNA nucleotides attracted to exposed bases according to base pairing rules (A-U...

RN
Answered by Rachel N. Biology tutor
3261 Views

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