Top answers

Biology
A Level

Describe the tertiary structure of a polypeptide

Tertiary polypeptide structure is overall 3 dimensional shape of protein which forms as a result of amino acid R group interactions such as ionic salt interactions and disulphide bridges. These interactio...

SM
Answered by Sam M. Biology tutor
2955 Views

How are proteins made in the cell?

Protein is transcribed from messenger RNA (mRNA) by ribosomes on the rough endoplasmic reticulum or ribosomes in the cytoplasm. This detects the start codon and moves along the mRNA 'reading' the bases on...

JB
Answered by Jessica B. Biology tutor
3061 Views

What is the difference between the sympathetic and parasympathetic nervous systems?

These are the two branches of the autonomic nervous system, which we have no conscious control of. The sympathetic system is responsible for 'fight and flight' responses, preparing the body for exercise o...

JB
Answered by James B. Biology tutor
3855 Views

What is the purpose of myelin on a neurone?

The myelin on peripheral neurones come in the form of schwann cells. These schwann cells are essentially coils of fat that sit around the neurone and insulate it, this has two fundamental purposes.
...

WH
Answered by Will H. Biology tutor
2859 Views

What is the difference between a prokaryotic cell and a eukaryotic cell?

Prokaryotic cells are smaller and more simple than eukaryotic cells. They do not contain membrane bound organelles such as mitochondria, endoplasmic reticulum and golgi apparatus. They also do not have a ...

AS
Answered by Abbie S. Biology tutor
4579 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning