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MDCAT Question Bank

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1009 available questions

Biology · Question 261

Aquatic arthropods belonging to this class breathe through gills.

  1. Insects
  2. Arachnids
  3. Crustaceans
  4. Arachinds and Crustaceans
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Correct answer: C

Crustaceans

Biology · Question 262

The raw material that is used by natural selection for better survival is/are:

  1. Variation only
  2. Mutation only
  3. Similarity only
  4. Variation and mutation
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Correct answer: D

Variation and mutation

Biology · Question 263

Vertebrates belong to phylum chordata because:

  1. They have a vertebral column
  2. The brain is enclosed by the skull
  3. The embryos have gills
  4. The body develops from three germinal layers
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Correct answer: C

The embryos have gills

Biology · Question 264

What structural organization is most common in globular proteins?

  1. primary structure
  2. secondary structure
  3. tertiary structure
  4. quaternary structure
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Correct answer: C

tertiary structure

Biology · Question 265

The Calvin cycle is completed in stages:

  1. Two
  2. Three
  3. Four
  4. Five
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Correct answer: B

Three

Biology · Question 266

The resting membrane potential of neuron is measured about:

  1. -30 millivolts
  2. 50 millivolts
  3. -70 millivolts
  4. 100 millivolts
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Correct answer: C

-70 millivolts

Biology · Question 267

The function of cell wall in prokaryotes is

  1. to give cells rigidity
  2. to give specific shape
  3. to protect from asmotic lysis
  4. All of above
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Correct answer: D

All of above

Biology · Question 268

Detoxification of drug is the main role of:

  1. Golgi bodies
  2. Mitochondria
  3. Rough Endoplasmic Reticulum
  4. Smooth Endoplasmic Reticulum
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Correct answer: D

Smooth Endoplasmic Reticulum

Biology · Question 269

Most reflex arcs are:

  1. Monosynaptic reflex
  2. Polysynaptic reflex
  3. Hemi Synaptic Reflex
  4. none of these
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Correct answer: B

Polysynaptic reflex

Biology · Question 270

A small biological unit that can evolve over time is

  1. a specie
  2. a population
  3. an organism
  4. cell
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Correct answer: A

a specie