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NEET Zoology MCQs: Class-XI and Class-XII



NEET Zoology MCQs: Class-XI and Class-XII

Which of these is not an important component of initiation of parturition in humans?

[class-xii ]

  • Increase in estrogen and progesterone ratio
  • Synthesis of prostaglandins
  • Release of Oxytocin
  • Release of Prolactin
  • Correct Option: D  [ Release of Prolactin ]

    Remark:

Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?

[class-xii ]

  • Graafian follicle
  • Corpus luteum
  • Foetus
  • Uterus
  • Correct Option: B  [ Corpus luteum ]

    Remark:

Statement I: The condon 'AUG' codes for methionine and phenylalanine.
Statement II: 'AAA' and 'AAG' both codons code for the amino acid lysine.
In the light of the above statements, choose the correct answer from the options given below.

[class-xii ]

  • Both statement I and Statement II are true.
  • Both Statement I and Statement II are false
  • Statement I is correct but Statement II is false
  • Statement I is incorrect but Statement II is true
  • Correct Option: D  [ Statement I is incorrect but Statement II is true ]

    Remark:

Which one of the following statements about Histones is wrong?

[class-xii ]

  • Histones are organized to form a unit of 8 molecules.
  • The pH of histones is slightly acidic.
  • Histones are rich in amino acids - Lysine and Arginine.
  • Histones carry positive charge in the side chain.
  • Correct Option: B  [ The pH of histones is slightly acidic. ]

    Remark:

Match List-I with List-II.

List-I List-II
(A)Adaptive radiation (I)Selection of resistant varieties due to excessive use of herbicides and pesticides
(B)Convergent evolution (II)Bones of forelimbs in Man and Whale
(C)Divergent evolution (III)Wings of Butterfly and Birds
(D)Evolution by anthropogenic action (IV)Darwin Finches
Choose the correct answer from the options given below:

[class-xii ]

  • A-III, B-II, C-I, D-IV
  • A-II, B-I, C-IV, D-III
  • A-I, B-IV, C-III, D-II
  • A-IV, B-III, C-II, D-I
  • Correct Option: D  [ A-IV, B-III, C-II, D-I ]

    Remark:

Match List-I with List-II.

List-I List-II
(A)Filariasis (I)Haemophilus influenzae
(B)Amoebiasis (II)Trichophyton
(C)Pneumonia (III)Wuchereria bancrofti
(D)Ringworm (IV)Entamoeba histolytica
Choose the correct answer from the options given below:

[class-xii ]

  • A-III, B-IV, C-I, D-II
  • A-I, B-II, C-IV, D-III
  • A-II, B-III, C-I, D-IV
  • A-IV, B-I, C-III, D-II
  • Correct Option: A  [ A-III, B-IV, C-I, D-II ]

    Remark:

Which of the following is not a step in Multiple Ovulation Embryo Transfer Technology (MOET)?

[class-xii ]

  • Cow is administered hormone having LH like activity for super ovulation
  • Cow yields about 6-8 eggs at a time
  • Cow is fertilized by artificial insemination
  • Fertilized eggs are transferred to surrogate mothers at 8-32 cell stage
  • Correct Option: A  [ Cow is administered hormone having LH like activity for super ovulation ]

    Remark:

The Adenosine deaminase deficiency results into:

[class-xii ]

  • Dysfunction of Immune system
  • Parkinson's disease
  • Digestive disorder
  • Addison's disease
  • Correct Option: A  [ Dysfunction of Immune system ]

    Remark:

Match List-I with List-II.

List-I List-II
(A)Allen's Rule (I)Kangaroo rat
(B)Physiological adaptation (II)Desert lizard
(C)Behavioural adaptation (III)Marine fish at depth
(D)Biochemical adaptation (IV)Polar seal
Choose the correct answer from the options given below:

[class-xii ]

  • A-IV, B-I, C-III, D-II
  • A-IV, B-I, C-II, D-III
  • A-IV, B-III, C-II, D-I
  • A-IV, B-II, C-III, D-I
  • Correct Option: B  [ A-IV, B-I, C-II, D-III ]

    Remark:

Assertion (A): A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.
Reason (R): Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.
In the light of the above statements, choose the correct answer from the options given below.

[class-xii ]

  • Both (A) and (R) are true and (R) is the correct explanation of (A)
  • Both (A) and (R) are true but (R) is not the correct explanation of (A)
  • (A) is true but (R) is false
  • (A) is false but (R) is true
  • Correct Option: A  [ Both (A) and (R) are true and (R) is the correct explanation of (A) ]

    Remark: