Top answers

Biology
All levels

What is diffusion?

All the cells in our body communicate constantly with their surrounding environment in order to feed and excrete their wastes. Various substances in that environment pass through the cell membrane to ente...

KC
Answered by Kleio C. Biology tutor
3613 Views

How do mutations make non-functional enzymes?

Mutations are changes to the base sequence. The base sequence determines the amino acid sequence. A different base sequence therefore codes for a different amino acid sequence. Amino acids interact with e...

CB
Answered by Chris B. Biology tutor
28862 Views

How are signals transferred across a synapse?

The function of the synapse is to transfer electric activity from one cell to another. At chemical synapses, the presynaptic neuron is separated from the postsynaptic neuron by a synaptic cleft. Transmiss...

CW
Answered by Caroline W. Biology tutor
10670 Views

How do the structure of phospholipids contribute to their positioning in the cell plasma membrane?

The plasma membrane is organised into what is referred to as a lipid bilayer, consisting primarily of phospholipids and proteins. Phospholipids contain a hydrophobic (water hating) fatty acid 'tail' and a...

OO
Answered by Oluwatobi O. Biology tutor
4782 Views

What is functional RNA?

Non-coding RNA.The sequence of Messenger RNA codes for a protein so is not functional RNA. However some RNA has catalytic function, such as ribosomal RNA, doesn't code for proteins so is functional RNA. T...

EC
Answered by Edward C. Biology tutor
13638 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:

© 2025 by IXL Learning