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NEET Zoology MCQs: Class-XI and Class-XII



NEET Zoology MCQs: Class-XI and Class-XII

Given below are two statements:
Statement I: Fatty acids and glycerols cannot be absorbed into the blood.
Statement II: Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the blood.
In the light of the above statements, choose the most appropriate answer from the options given below:

[class-xi ]

  • 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: D  [ Both Statement I and Statement II are correct ]

    Remark:

Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver ___________ ml of O2 to the tissues.

[class-xi ]

  • 5 ml
  • 4 ml
  • 10 ml
  • 2 ml
  • Correct Option: A  [ 5 ml ]

    Remark:

Which of the following is not the function of conducting part of respiratory system ?

[class-xi ]

  • Inhaled air is humidified
  • Temperature of inhaled air is brought to body temperature
  • Provides surface for diffusion of O2 and CO2
  • It clears inhaled air from foreign particles
  • Correct Option: C  [ Provides surface for diffusion of O2 and CO2 ]

    Remark:

Given below are two statements:
Statement I: The coagulum is formed of network of threads called thrombins.
Statement II: Spleen is the graveyard of erythrocytes.
In the light of the above statements, choose the most appropriate answer from the options given below:

[class-xi ]

  • 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: C  [ Statement I is incorrect but Statement II is correct ]

    Remark:

Nitrogenous waste is excreted in the form of pellet or paste by:

[class-xi ]

  • Salamandra
  • Hippocampus
  • Pavo
  • Ornithorhynchus
  • Correct Option: C  [ Pavo ]

    Remark:

Which of the following is a correct match for disease and its symptoms ?

[class-xi ]

  • Tetany - high Ca2+ level causing rapid spasms.
  • Myasthenia gravis - Genetic disorder resulting in weakening and paralysis of skeletal muscle
  • Muscular dystrophy - An auto immune disorder causing progressive degeneration of skeletal muscle
  • Arthritis - Inflammed joints
  • Correct Option: D  [ Arthritis - Inflammed joints ]

    Remark:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chances of fractures.
Reason (R): Common cause of osteoporosis is increased levels of estrogen.
In the light of the above statements, choose the most appropriate answer from the options given below:

[class-xi ]

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

    Remark:

Identify the asexual reproductive structure associated with Penicillium:

[class-xii ]

  • Conidia
  • Gemmules
  • Buds
  • Zoospores
  • Correct Option: A  [ Conidia ]

    Remark:

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
A. It results in the formation of haploid gametes
B. Differentiation of gamete occurs after the completion of meiosis
C. Meiosis occurs continuously in a mitotically dividing stem cell population
D. It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary
E. It is initiated at puberty
Choose the most appropriate answer from the options given below:

[class-xii ]

  • B and C only
  • B, D and E only
  • B, C and E only
  • C and E only
  • Correct Option: C  [ B, C and E only ]

    Remark:

At which stage of life the oogenesis process is initiated ?

[class-xii ]

  • Embryonic development stage
  • Birth
  • Adult
  • Puberty
  • Correct Option: A  [ Embryonic development stage ]

    Remark: