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Biology
GCSE

Describe the similarities and differences between DNA and RNA structures

Structurally, DNA and RNA are very similar. They're both composed of a backbone of sugar, a phosphate group and a chemical base. However, the sugar in DNA is a deoxyribose sugar and the sugar in RNA is a ...

Answered by Shannon M. Biology tutor
6973 Views

How can white blood cells defend against pathogens? (Give 3 ways)

White blood cells (WBC) are like our body's guards patrolling our blood to look for any pathogens (bacteria and virus).WBC kills pathogens in the following ways before pathogens make us ill.Eatin...

Answered by Yvonne L. Biology tutor
36330 Views

What are the differences and similarities between animal cells and plant cells in terms of structure and function?

Animal cells and plant cells similarities:StructureBoth animal and plant cells contain a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes.Both animal and plant ...

Answered by Mariyum K. Biology tutor
16389 Views

How do bacteria have a role in the nitrogen cycle?

This answer is best supported with a whiteboardAll living things need nitrogen, but nitrogen gas is too unreactive for plants and animals to use directly. Bacteria's main role in the nitrogen cyc...

Answered by Katie D. Biology tutor
8335 Views

Explain and describe how vaccinations prevent illness.

Vaccinations involve introducing a small amount of dead or inactive form of a pathogen into the body. This stimulates white blood cells to produce complementary antibodies to destroy the pathogen. This is...

Answered by Francesca S. Biology tutor
3140 Views

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