Search our library of Biology GCSE questions

Top answers

Biology

GCSE

What is diffusion and why is it important in both animals and plants?

Diffusion is a passive process involving the movement of molecules from a region of a higher concentration to one of a lower concentration (the term passive means that the process does...

Answered by Mathew C. • Biology tutor

181226 Views

Where is DNA found in a human cell? What is a gene?

DNA is a long molecule found in the nucleus (or more specifically the nucleolus) of a human cell. When it is condensed and shortened it appears, under a microscope,

Answered by Ryan M. • Biology tutor

17811 Views

Describe the structure of DNA and where it is found inside a human cell

The DNA molecule is found within the nucleus of the cell, organised into chromosomes. In humans, there are 46 chromosomes. The DNA molecule consists of organic bases joined by sugars and phosphate mole...

Answered by Kelly T. • Biology tutor

7057 Views

What is osmosis?

Osmosis is the movement of water from a high concentration to a low concentration through a partially permeable membrane. It is a special type of diffusion.

You ma...

Answered by Yvonne W. • Biology tutor

24880 Views

How are action potentials transmitted?

Information passes through nerves rapidly in the form of action potentials, or transient changes in voltage across the nerve cell membrane. Nerve cells, or neurons, are able to transmit action potentia...

Answered by Kilda C. • Biology tutor

8196 Views