As you want the question paper of West Bengal Joint Entrance Examination WBJEE exam so here I am providing you.

WBJEE exam question paper

Biology

1. Passage cells help in
(A) transport of water towards pericycle (B) transport of water towards epiblema
(C) absorption of water from soil (D) passage of CO2 towards stomata
Ans : (A)
Hint : Passage cells are endodermal cells lacking casparian strip which allow comparatively faster movement of
water into stele.
2. Medullary rays are tissues made up of
(A) phloem parenchyma (B) xylem parenchyma
(C) sieve tube (D) sclerenchyma
Ans : (B)
Hint : Medullary rays or Wood rays are made up of xylem parenchyma.
3. An allosteric inhibitor of the enzyme acts by binding to the
(A) substrate (B) product
(C) catalytic site of the enzyme (D) non-catalytic site of the enzyme
Ans : (D)
Hint : Allosteric inhibitor attaches with non catalytic site of enzyme called ‘Allosteric site’
4. A set of genes will be in a complete linkage when the progeny phenotypes for parental (P) and recombinant (R) types
are
(A) P = 0%, R = 100% (B) P = 50%, R = 50%
(C) P < 50%, R > 50% (D) P = 100%, R = 0%
Ans : (D)
5. Which one of the following statements is WRONG in relation to transgenic Bt cotton plant?
(A) Crop yield loss due to attack by Bacillus thuringiensis bacterium is reduced
(B) Crop yield loss due to attack by lepidopteran insect pests is reduced
(C) The use of chemical insecticides in the cotton field is minimized
(D) Better quality cotton is produced
Ans : (A)
Hint : Bacillus thuringiensis does not attack cotton plants and hence cannot reduce crop loss.

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