Top answers

Why do enzymes stop working at high temperatures?

With this question, you have to remember that enzymes are proteins. When the temperature gets too hot, the enzyme denatures . Denaturing is where the bonds that hold the enzyme together break, causing the ac...
CR
Answered by Callum R. • Biology tutor
11840 Views

How can I score well in the synoptic essay?

There are two main parts to the synoptic essay, the subject/specification content which will probably make up around 80-90% of your essay, and then the extra content, which is composed of things above the sy...
CR
Answered by Callum R. • Biology tutor
5150 Views

Describe the similarities and differences between the structure of ATP and a DNA nucleotide

Similarities Both have 5 Carbon sugar - pentose Both contain a phosphate Both contain adenine Differences DNA has a deoxyribose sugar whereas ATP has a ribose sugar DNA can involve all four bases, ATP only a...
AR
Answered by Abdul R. • Biology tutor
71562 Views

I'm confused about the difference between active and passive immunity

Active immunity occurs when an individual develops immunity against a specific antigen when they are exposed to it - your body reacts by producing memory cells that provide long lasting immunity against that...
SP
Answered by Sophie P. • Biology tutor
6062 Views

What's the difference between an antigen and an antibody?

An antigen is a substance that is introduced to the body and stimulates an immune response and the production of antibodies. Antibodies are proteins produced by cells in the body in in repsonse to the presen...
SP
Answered by Sophie P. • Biology tutor
9883 Views