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Biology

A Level

What is the difference between mRNA and tRNA?

RNA stands for riboncleic acid. mRNA is messenger RNA. This type of RNA is a linear polymer involed in a part of protein symthesis called transcription. It allows the DNA code to be taken outside the n...

Answered by Sophia L. • Biology tutor

14185 Views

What properties does water possess that make it an essential molecule for life?

· Solvent – Good for polar substances (salts, sugars, simple alcohols)

· Heat Capacity – Energy to raise 1kg water by 1^oK. Keeps blood temperature stable

Answered by Connor B. • Biology tutor

4600 Views

"Describe the process of Aerobic Respiration"

Aerobic respiration is a process that releases energy from a respiratory substrate (e.g. glucose) by fully oxidising it. Energy is released in the form of ATP; Carbon dioxide and Water are released as ...

Answered by Firat G. • Biology tutor

10898 Views

What are the features of alveolar epithelium which allow efficient gas exchange?

The alveolar epithelium is very thin, just one cell layer thick. This means the diffustion distance is small, therefore diffusion of gases occurs rapidly.

Remember that diffusion is the n...

Answered by Shoam B. • Biology tutor

18358 Views