Home NEET Botany MCQs NEET Zoology MCQs NEET Syllabus

NEET Zoology MCQs: Class-XI and Class-XII



NEET Zoology MCQs: Class-XI and Class-XII

Given below are two statements:
Statement I: The release of sperms into the seminiferous tubules is called spermiation. Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below:

[class-xii ]

  • Both Statement I and Statement II are incorrect
  • Statement I is correct but Statement II is incorrect
  • Statement I is correct but Statement II is incorrect
  • Both Statement I and Statement II are correct
  • Correct Option: B  [ Statement I is correct but Statement II is incorrect ]

    Remark:

Lippe's loop is a type of contraceptive used as:

[class-xii ]

  • Vault barrier
  • Non–Medicated IUD
  • Copper releasing IUD
  • Cervical barrier
  • Correct Option: B  [ Non–Medicated IUD ]

    Remark:

In an E.coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?

[class-xii ]

  • z, y, a genes will be transcribed
  • z, y, a genes will not be translated
  • RNA polymerase will bind the promoter region
  • Only z gene will get transcribed
  • Correct Option: B  [ z, y, a genes will not be translated ]

    Remark:

If the length of a DNA molecule is 1.1 metres, what will be the approximate number of base pairs?

[class-xii ]

  • 6.6 x 106 bp
  • 3.3 x 109 bp
  • 6.6 x 109 bp
  • 3.3 x 106 bp
  • Correct Option: B  [ 3.3 x 109 bp ]

    Remark:

Natural selection where more individuals acquire specific character value other than the mean character value, leads to:

[class-xii ]

  • Directional change
  • Disruptive change
  • Random change
  • Stabilising change
  • Correct Option: A  [ Directional change ]

    Remark:

Given below are two statements:
Statement I: Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies.
Statement II: Rheumatoid arthritis is a condition where body does not attack self cells.
In the light of the above statements, choose the most appropriate answer from the options given below:

[class-xii ]

  • Both Statement I and Statement II are incorrect
  • Statement I is correct but Statement II is incorrect
  • Statement I is incorrect but Statement II is correct
  • Both Statement I and Statement II are correct
  • Correct Option: B  [ Statement I is correct but Statement II is incorrect ]

    Remark:

In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

[class-xii ]

  • Gene isolated from marrow cells producing ADA is introduced into cells at embryonic stages
  • Lymphocytes from patient's blood are grown in culture, outside the body.
  • Genetically engineered lymphocytes are not immortal cells.
  • Retroviral vector is introduced into these lymphocytes.
  • Correct Option: C  [ Genetically engineered lymphocytes are not immortal cells. ]

    Remark:

Breeding crops with higher levels of vitamins and minerals or higher proteins and healthier fats is called:

[class-xii ]

  • Bio-remediation
  • Bio-fortification
  • Bio-accumulation
  • Bio-magnification
  • Correct Option: B  [ Bio-fortification ]

    Remark:

Which of the following statements with respect to Endoplasmic Reticulum is incorrect?

[class-xi ]

  • SER is devoid of ribosomes
  • In prokaryotes only RER are present
  • SER are the sites for lipid synthesis
  • RER has ribosomes attached to ER
  • Correct Option: B  [ In prokaryotes only RER are present ]

    Remark:

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is C6H12O6 then what is the formula for maltose ?

[class-xi ]

  • C12H24O12
  • C12H22O11
  • C12H24O11
  • C12H20O10
  • Correct Option: B  [ C12H22O11 ]

    Remark: