Zoology 2020 Question Paper Online Test (12th Standard)

Q1

Paedogenetic Parthenogenesis occurs in :

A.Aphis B.Honey bees C.Solenobia D.Gall fly

Q2

Which of the following menstrual irregularities is correctly matched ?

A.Oligomenorrhoea - Excessive menstruation B.Menorrhagia - Painful menstruation C.Amenorrhoea - Absence of menstruation D.Dysmenorrhoea - Irregularity of menstruation

Q3

Which one of the following technique is used to monitor the foetal heart rate and other functions during late pregnancy and labour ?

A.Foetoscope B.EEG C.Amniocentesis D.CVS

Q4

If the Child’s blood group is ‘O’, the father’s blood group is ‘A’ and the mother’s blood group is ‘B’, the genotypes of the parents will be :

A.I^A I^O and I^B I^O B.I^A I^A and I^B I^O C.I^O I^O and I^B I^B D.I^A I^B and I^O I^O

Q5

Assertion (A) : XX - XO type of sex determination is seen in bedbugs, cockroaches and grasshoppers.
Reason (R) : The sex of the offspring depends upon the sperm that fertilizes the egg.

A.Both (A) and (R) are true and (R) is not the correct explanation for (A). B.Both (A) and (R) are false. C.(A) is true and (R) is false. D.Both (A) and (R) are true and (R) is the correct explanation for (A).

Q6

Which of the following chromosome has the highest gene density ?

A.Chromosome ‘Y’ B.Chromosome 1 C.Chromosome 19 D.Chromosome 13

Q7

__________ and __________ proposed the classical model of Lac operon to explain gene expression and regulation in E. coli.

A.Hershey, Chase B.Jacob, Monod C.Meselson, Stahl D.Watson, Crick

Q8

A population will not exist in Hardy-Weinberg equilibrium if :

A.The population is large. B.Individuals mate selectively. C.There are no mutations. D.There is no migration.

Q9

Find the true and false statements from the following :
(i) Plasmodium vivax is a digenic parasite.
(ii) The life cycle of Plasmodium involves 3 phases namely, schizogony, polygony and sporogony.
(iii) The large schizont shows yellowish - brown pigmented granules called Schuffner’s granules.
(iv) Plasmodium infection leads to Lysis of white blood cells results in cycles of fever and other symptoms.

A.(i) - True, (ii) - True, (iii) - False, (iv) - True B.(i) - True, (ii) - True, (iii) - False, (iv) - False C.(i) - True, (ii) - False, (iii) - True, (iv) - False D.(i) - False, (ii) - True, (iii) - False, (iv) - True

Q10

B Cells that produce and release large amounts of antibody is called :

A.Killer Cells B.Memory Cells C.Basophils D.Plasma Cells

Q11

Which one of the following bacterium is not involved in ethanol production ?

A.Sarcina ventriculi B.Saccharomyces cerevisiae C.Ideonella sakaiensis D.Zymomonas mobilis

Q12

The first clinical gene therapy was done for the treatment of :

A.SCID B.AIDS C.Cancer D.Cystic Fibrosis

Q13

Which of the following group of animals are the common fauna of the Thar deserts ?

A.Gaur, Rhino, Antelope B.Jack rabbits, Kangaroo rats, Pocket mice C.The blackbuck, The Indian Spiny-tailed lizard, The white-footed fox D.Bobcat, Timber wolf, Black bear

Q14

In the E-waste generated by the mobile phones, which among the following metal is most abundant ?

A.Gold B.Copper C.Silver D.Palladium

Q15

Which one of the following is not coming under in situ conservation ?

A.Biosphere Reserve B.Sanctuaries C.National Parks D.Zoological Park

12th Standard Zoology March 2020: Online Practice Test

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