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MDCAT Question Bank

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1009 available questions

Biology · Question 221

What would be the resolving power of the objective length in a microscope if the eyepiece is 10X and total magnification is 40X?

  1. 4
  2. 10
  3. 40
  4. 400
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Correct answer: A

4

Biology · Question 222

Interconversion of carbohydrates proteins and lipids in living cells are an exaple of?

  1. Coordinaged catabolic activities
  2. Coordianted anabolic activities
  3. both A and B
  4. none of these
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Correct answer: C

both A and B

Biology · Question 223

Mitochondria was first seen a5 granules in:

  1. White Blood cells
  2. Red blood cells
  3. Muscle cells
  4. Liver cells
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Correct answer: C

Muscle cells

Biology · Question 224

The nervous system of arthropods has:

  1. A brain, a ventral nerve cord and several ganglia.
  2. A brain, a dorsal nerve cord and several ganglia.
  3. A brain, a dorsal and ventral nerve cord and serveral ganglia.
  4. A ventral nerve cord and several ganglia.
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Correct answer: A

A brain, a ventral nerve cord and several ganglia.

Biology · Question 225

Proteins are macromolecules formed of units known as amino acids, the amino acids in which the variable group (R) is represented by an H atom is:

  1. Lysin
  2. Phenylalanine
  3. Glycine
  4. Alanine
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Correct answer: C

Glycine

Biology · Question 226

A single motor neuron may innervate as few as 3-5 fibers in muscles of:

  1. upper arms
  2. legs
  3. eyes
  4. heart
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Correct answer: C

eyes

Biology · Question 227

Enzymes are in nature:

  1. Carbohydrates
  2. Proteins
  3. Lipids
  4. Vitamins
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Correct answer: B

Proteins

Biology · Question 228

Carbohydrate catabolism is concerned with the fate of

  1. ATP
  2. Glucose
  3. Amino acid
  4. all of these
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Correct answer: B

Glucose

Biology · Question 229

Red-green colour blindness is X-linked recessive. A boy’s mother has two normal alleles. What is the probability that the boy is colour-blind because of this trait?

  1. 0%
  2. 25%
  3. 50%
  4. 75%
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Correct answer: A

0%

A son receives his X chromosome from his mother. A mother with two normal alleles can pass only a normal allele, so the probability is 0%.

Biology · Question 230

The percentage of carbon dioxide carried as carboxyhaemoglobin is:

  1. 0.7
  2. 0.23
  3. 0.15
  4. 0.07
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Correct answer: B

0.23