Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement

51.

Select the correct statements from the following regarding asexual reproduction.

I. It is slower than sexual reproduction.

II. It involve a single parent.

III. It produces progeny that are genetically identical with the parent.

IV. Clones are the progeny of asexual reproduction

  • I, II, III, IV

  • I, II, IV

  • I, II, III

  • II, III, IV


D.

II, III, IV

Statement II, III and IV are correct. 

Asexual reproduction is a rapid mode of reproduction involving single parent. Since, no meiosis and gametic fusion occur, genetic variation is not observed in offspring. These are clones of their parent and are genetically identical. It is a uniparental phenomenon. The organisms increase their mass and maturity until at a critical point. They reproduce by simple division of their substance. Each successive organism has the same physio-chemical constitution as the parent.


Advertisement
52.

Sushi is a highly prized delicacy prepared from the flesh of Japanese puffer fish.

But recently it is found to pose health risk to humans because.

  • tetrodotoxin (TTX) in its gonads block Na+ channels on axons

  • α- bungarotoxin from the fish block acetylcholine receptors

  • toxins in its body block different types of voltage gated by Ca2+ channels

  • None of the above


53.

Given below are the set of statements describing the structural details of Purines (A) and Pyrimidines (BJ.

I. Nine - membered, double ring

II. Six - membered, single ring

III. Contains Nitrogen atoms at four positions

IV. Contains Nitrogen atoms at two positions

Segregate the statements I - IV into categories A and B and choose the correct option.

  • A B
    I, IV II, III
  • Only I Only IV
  • Only II Only I
  • I, III II, IV

54.

Which type of RNA carries no coding message?

  • mRNA

  • tRNA

  • rRNA

  • tRNA and rRNA


Advertisement
55.

Parapatric speciation takes place when

  • a small segment of the original population becomes isolated reproductively

  • a part of the population becomes geographically isolated from the main population

  • a very different daughter species bud off from a semi- isolated peripheral population of ancestral species

  • a population of a species enters a new habitat


56.

Evolution of horses occured in

  • Holocene epoch

  • Miocene epoch

  • Palaeocene epoch

  • Eocene epoch


57.

Match the following columns and choose the correct option from the codes given below.

Column I (Cytokine) Column II (Function)
A. Gamma infection (γ- IFN) 1. Stimulates TH cells in the presence of antigens
B. Interlukin 1 (IL- 1) 2. Cytotoxic to tumour cells
C. Interlukin 2 (IL- 2) 3. Increase macrophage activity against tumour cells
D. Tumour necrosis factors beta (TNF- β) 4. Involved in the proliferation of antigen- stimulated TH cells

  • A - 1; B - 4; C - 3; D - 2

  • A - 4; B - 3; C - 2; D - 1

  • A - 3; B - 1; C - 4; D - 2

  • A - 2; B - 3; C - 1; D - 4


58.

Match the following columns and choose the correct option from the codes given below.

Column I (Terminology related to corals) Column II (Explanation)
A. Corallite 1. Main constitutent of coral reef
B. Corallium 2. Central irregular skeleton mass of ridge
C. Hexacoralliaons 3. Skeleton of mass solitary coral
D. Columella 4. Skeleton of colonical coral

  • A - 1; B - 3; C - 2; D - 4

  • A - 2; B - 1; C - 4; D - 3

  • A - 3; B - 4; C - 1; D - 2

  • A - 4; B - 2; C - 3; D - 1


Advertisement
59.

Study the following Columns.

Column I Column II
A. Hydrogen bond 1. Adenine - Deoxyribose
B. N - glycosidic linkage 2. Glucose - Fructose
C. Phosphodiester bond 3. Leucine - Glycine
D. Peptide bond

4. Nucleotide - Nucleotide in polynucleotide chain

5. Guanine cytosine on opposite strands of DNA.

The correct match is

  • A - 5; B - 1; C - 4; D - 3

  • A - 2; B - 1; C - 5; D - 3

  • A - 5; B - 3; C - 4; D - 2

  • A - 1; B - 4; C - 5; D - 2


60.

Identify the correct pair of statements.

I. White kernal of coconut is a free nuclear endosperm.

II. In dioecious plants, autogamy is prevented but geitonogamy occurs.

III. Cleistogamous flowers are always selfpollinated.

IV. Castor is an endospermic seed.

  • II, IV

  • II, III

  • I, II

  • III, IV


Advertisement