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Biology
GCSE

What is photosynthesis? Where does it occur? What are the reactants and products of the process?

Photosynthesis is the process that allows plant cells to convert light energy (from the sun rays) into chemical energy. This energy is biologically useable to the plant, and essential to it's survival.

Answered by Hannah D. • Biology tutor
2433 Views

Compare and contrast eukaryotic and prokaryotic cells.

Tip: when answering ‘compare and contrast’ questions, use keywords such as ‘whereas’, ‘in contrast to’, ‘similarly’ and ‘comparatively’.Eukaryotic cells are plant and animals cells, whereas prokaryotic ce...

Answered by Ellie P. • Biology tutor
3373 Views

evaluate some different treatments for cardiovascular disease (6)

LIFESTYLE examples of lifestyle treatment Lower blood cholesterol by cutting down on fatty foods.Stop smoking and other recreational drugs - They can affect heart rate and bloo...

Answered by Melissa D. • Biology tutor
1735 Views

How can the use of antibiotics contribute to bacteria becoming resistant?

Bacterial DNA can spontaneously mutate, which means a change in the nucleotide reading frame. By chance, a mutation may cause the bacteria to prevent being killed by the antibiotic. For example, by develo...

Answered by Carolina W. • Biology tutor
2066 Views

Explain the lock and key hypothesis of chemical reactions.

The lock and key hypothesis explains how each enzyme acts specifically on a certain substrate. The lock is the enzyme. The key is the substrate. The lock has a site where a specific subst...

Answered by Charlotte H. • Biology tutor
2077 Views

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