Joint Entrance Examination Question Papers

Hey I need the previous West Bengal Joint Entrance Examination question papers for the Biology so if you are having the same please provide me so I can have an idea???

[shikha]

Well below I have given you the West Bengal Joint Entrance Examination question papers for the Biology part so you can have a look


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)
Hint : Since there is complete linkage, parental combinations are 100% and recombinant types are 0%

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.

6. Which one of the following natural polymers is found both in insects and fungi?
(A) pectin (B) chitin
(C) cellulose (D) suberin
Ans : (B)
Hint : Chitin is a natural structural polysaccharide, which is found in both insects and fungi.

7. Which one of the followings in an in situ method of biodiversity conservation?
(A) national park (B) botanical garden
(C) zoological garden (D) scientific laboratory
Ans : (A)
Hint : Botanical garden, zoological parks and scientific laboratory are ex situ methods of conservation.

8. Nucleosome contains
(A) only histone protein (B) both DNA and histone protein
(C) only DNA (D) both DNA and RNA
Ans : (B)
Hint : Nucleosome contains both DNA and histone protein.

9. Which one of the following matching pairs is WRONG?
(A) Mollusca-Pseudocoel (B) Cnidaria-Nematocyst
(C) Annelida-Chloragogen cells (D) Echinodermata-Water vascular system
Ans : (A)

10. Which one of the following matching pairs is WRONG?
(A) Shell fish-Pisces (B) Silver fish-Arthropoda
(C) Cuttle fish-Mollusca (D) Star fish-Echinodermata
Ans : (A)
Hint : Shell fish are edible aquatic invertebrates, including various species of molluscs, crustaceans and
echinoderms.

11. Third stage larva of Wuchereria bancrofti carried by Culex mosquito is called
(A) cysticercus (B) merozoite
(C) microfilariae (D) trophozoite
Ans : (C)
Hint : Third stage of microfilariae are larva of Wuchercria bancrofti, infective to human.

12. Persons suffering from sickle cell anaemia normally DO NOT suffer from
(A) cholera (B) malaria
(C) high blood pressure (D) hepatitis
Ans : (B)
Hint : Erythrocytic phase of Plasmodium fails to complete in sickle shaped RBCs, hence persons with sickle cell
anaemia do not suffer from malaria.