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Structural Organisation in Animals · Question 85

AIPMT 2002MCQEasy📈 Topic in 38% papers+4−1
1

Melanin protects from:

  1. Infrared rays
  2. U.V. rays
  3. Visible rays
  4. X-rays

Answer

(2) U.V. rays

Solution

Melanin is a dark pigment produced by melanocytes in the epidermis of the skin.

⇒ It absorbs ultraviolet (U.V.) radiation of sunlight and so protects the deeper skin cells from U.V. damage.

∵ U.V. rays damage DNA and can cause skin cancer, more melanin is made on exposure to sunlight (tanning).

Answer: (2)

AIPMT 2002

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2

During an injury, the nasal septum gets damaged. For its recovery, which cartilage is preferred?

  1. Fibrous cartilage
  2. Elastic cartilage
  3. Calcified cartilage
  4. Hyaline cartilage
AIPMT 2001
3

Which cells do not form a layer and remain structurally separate?

  1. Nerve cells
  2. Epithelial cells
  3. Gland cells
  4. Muscle cells
AIPMT 2001
4

What happens if bone of frog is kept in dilute hydrochloric acid?

  1. Will become flexible
  2. Will turn black
  3. Will break into pieces
  4. Will shrink
AIPMT 2000
5

Proteoglycan in cartilages which is part of polysaccharide is

  1. Ossein
  2. Cartilegen
  3. Chondroitin
  4. Casein
AIPMT 2000
6

Characteristic of simple epithelium is that they

  1. Continue to divide and help in organ function
  2. They are arranged indiscriminately
  3. They make a definite layer
  4. None
AIPMT 2000
7

Primary function of enteronephric nephridia of Pheretima:

  1. Excretion of nitrogenous waste
  2. Locomotion
  3. Osmoregulation
  4. Respiration
AIPMT 2000

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All NEET Zoology chapters
Class 11Animal KingdomStructural Organisation in AnimalsBiomolecules (Biology)Digestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and Integration
Class 12Human ReproductionReproductive HealthEvolutionHuman Health and DiseaseBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsBiology Experimental Skills