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How to write an essay on: The importance of proteins in the control of processes and responses in organisms.

Explain the use of proteins as enzymatic catalyats - including examples. Enyzmes control metabolic pathways - such as in the Krebs cycle. Proteins/enzymes in photosynthesis - with examples. Control of moveme...
EB
Answered by Eva B. • Biology tutor
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Describe the process of extracellular digestion

Extracellular digestion is a process in which an organism feeds by secreting enzymes through its cell membrane and on to the food. These enzymes then catalyse the breakdown and the digestion of the food. Onc...
SN
Answered by Stuart N. • Biology tutor
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how does aveoli allow for a more efficient gas exchange in mammals?

avoli are small chambers that branvh off from the bronchioles in the lungs, and is where gas exchange directly occurs. these have quite an ireegular shape and contain many fold in its structure, this allows ...
CS
Answered by Cristina S. • Biology tutor
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Explain how the use of antibiotics might lead to a resistant strain of bacteria arising.

-Antibiotics kill individual bacterial cells. Random mutation of the DNA in a bacterial cell might confer antibiotic resistance to that bacterial cell. A cell with the resistance mutation is less likely to b...
MP
Answered by Mark P. • Biology tutor
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Describe how water is carried by the transpiration stream. (3 marks)

Transpiration is the loss of water from a plant by evaporation, which then diffuses out of the leaf via the stomata. It is important to note whether the student understands how and why water leaves the plant...
AS
Answered by Abishek S. • Biology tutor
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