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 movement across membranes - ion channels and G-PCRs (including second messengers) eg. in synaptic transmission.

Immunology - antibodiy proteins and the importance of these in tackling disease.

Haemoglobin - transport of oxygen from the lungs to tissues.

Protein/peptide hormones

Transcription factors and receptors

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