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Nursing Question Bank

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1265 available questions

Biology · Question 421

Many coenzymes are made in the body from:

  1. Vitamins
  2. Cellulose
  3. Neutral fats only
  4. DNA bases only
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Correct answer: A

Vitamins

Many vitamins, especially B vitamins, serve as precursors of coenzymes.

Biology · Question 422

The enzyme diastase converts starch mainly into:

  1. Maltose
  2. Amino acids
  3. Fatty acids
  4. Glycerol
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Correct answer: A

Maltose

Diastase is an amylase that hydrolyses starch to maltose and shorter carbohydrates.

Biology · Question 423

Which four elements account for most of the mass of living cells?

  1. Carbon, hydrogen, oxygen, and nitrogen
  2. Sodium, potassium, calcium, and iron
  3. Copper, zinc, iodine, and fluorine
  4. Silicon, aluminium, lead, and mercury
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Correct answer: A

Carbon, hydrogen, oxygen, and nitrogen

Carbon, hydrogen, oxygen, and nitrogen are the four most abundant elements in living matter.

Biology · Question 424

Most biological membranes are composed principally of:

  1. Lipids and proteins
  2. Cellulose and glycogen
  3. DNA and RNA
  4. Calcium carbonate only
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Correct answer: A

Lipids and proteins

A lipid bilayer containing many proteins forms the basic structure of most cell membranes.

Biology · Question 425

A large regional ecological community determined mainly by climate and dominant vegetation is a:

  1. Biome
  2. Population
  3. Species
  4. Organ system
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Correct answer: A

Biome

A biome is a major regional biological community shaped chiefly by climate.

Biology · Question 426

Which type of pathogen is directly susceptible to antibacterial antibiotics?

  1. Bacterium
  2. Virus
  3. Prion
  4. All pathogens equally
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Correct answer: A

Bacterium

Antibacterial antibiotics target bacterial structures or processes and do not treat viral infections.

Biology · Question 427

The rapid shallow breathing that cools a dog by evaporation is called:

  1. Panting
  2. Shivering
  3. Hibernation
  4. Ecdysis
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Correct answer: A

Panting

Panting increases evaporation from moist respiratory surfaces and removes heat.

Biology · Question 428

Haemodialysis removes wastes and excess water principally from the:

  1. Blood
  2. Lymph only
  3. Bile
  4. Cerebrospinal fluid
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Correct answer: A

Blood

During haemodialysis, blood passes through a dialyser that removes selected wastes and water.

Biology · Question 429

The scientific study of fossils is called:

  1. Paleontology
  2. Physiology
  3. Cytology
  4. Immunology
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Correct answer: A

Paleontology

Paleontology uses fossils to study ancient life and evolutionary history.

Biology · Question 430

Which vitamin is required to form the light-sensitive visual pigment rhodopsin?

  1. Vitamin A
  2. Vitamin C
  3. Vitamin D
  4. Vitamin K
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Correct answer: A

Vitamin A

Vitamin A supplies retinal, the chromophore used in rhodopsin.