Search our library of Biology questions

Top answers

Biology

All levels

How are signals transmitted across the synaptic cleft?

When the action potential reaches the synaptic knob it causes voltage-gated calcium ion channels to open, allowing calcium ions to diffuse in.

These calcium ions cause

Answered by Dani E. • Biology tutor

3439 Views

A guanine is swapped for a thymine in a gene sequence. Explain how this may alter the function of the protein it translates.

The alteration in the nucleotide sequence of the gene may result in a change in the amino acid sequence of the protein during translation. Each set of three RNA nucleotides (anticodon) is recognised by...

Answered by Matthew D. • Biology tutor

3365 Views

Describe how plants react to the environmental factor of Light

One environmental factor which has an effect on a plant is light.

The stems of a plant grow towards the light, and roots grow away from the light.

We call ...

Answered by Ellie A. • Biology tutor

1995 Views

What are the main similarities and differences in the structure of plant and animal cells?

Animal cells have the following organelles:
A nucleus which controls the activities of the cell and stores the cell DNA; cytoplasm where most of the cell's chemical reactions take place; a cell membr...

Answered by Amy W. • Biology tutor

3424 Views

What is the difference between diffusion, osmosis and active transport?

Diffusion
Diffusion is the process in which particles/ substances spread out in a solution or a gas. The result of this process is that particles move down the concentration gradient...

Answered by Amy W. • Biology tutor

91461 Views