Biology Mcqs

Which of the following statement about the head of a chlorophyll molecule is incorrect?

(A) It is a porphyrin ring or tetrapyrrole ring structure

(B) It is flat, square and light absorbing

(C) Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

(D) It is hydrophobic

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Chlorophyll is insoluble in_____________?

(A) Carbon tetrachloride

(B) Alcohol

(C) Organic solvents

(D) Water

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First Actions spectrum was obtained by using__________?

(A) Algae

(B) Fungi

(C) Bacteria

(D) Spirogyra

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Which of the light is mainly absorbed by the plants?

(A) Orange

(B) Red

(C) Green

(D) Both A and B

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Xanthophylls are _________ pigments

(A) Yellow

(B) Red

(C) Orange

(D) Green

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Chlorophylls are found embedded in the __________ membranes?

(A) Stroma

(B) Grana

(C) Thylakoid

(D) Intergrana

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The dense fluid filled region in the chloroplast is____________?

(A) Grana

(B) Stroma

(C) Thylakoid

(D) None of these

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Photosystem II has molecules which absorbs maximum light of___________?

(A) 680 nm

(B) 100 m

(C) 700 nm

(D) 670 nm

Submitted By: Ali Uppal


In all plants the major sites of phosynthesis are___________?

(A) Leaves respire and utilize O2 and release CO2.

(B) Stems

(C) Roots

(D) Branches

Submitted By: Ali Uppal