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problem 1) Two polypeptides, X and Y, have alike tertiary structures, X usually exists as the monomer, while B exists as the tetramer, B4. prepare down the differences that might be expected in amino acid composition of X versus Y in your own words?

problem 2) Find out whether the statements given below are true or false. If false you should give a suitable reason describing why.

i) Ultimate source of energy to support most life on Earth is sunlight.

ii) Overall function of Calvin cycle is to capture energy from sunlight

iii) Calvin cycle enzymes are embedded in thylakoid membrane.

iv) Cyclic photophosphorylation occupies both photosystems I and II, and results in production of NADPH, O2, and ATP.

v) C4 plants avoid problem of photorespiration by spatial separation of reactions involved in carbon fixation and Calvin cycle.

vi) Chloroplasts and mitochondria both generate ATP by chemiosmosis, that involves electron transport chains, active transport of H+ ions, and diffusion of H+ through ATP synthase.

problem 3) The oak tree would be the classic ex of the CAM plant. describe three various kinds of microbial interactions. Which one do you think is the most significant in controlling microbial numbers and describe why in detail?

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