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Nursing Question Bank

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1265 available questions

Biology · Question 271

Which part of the brain controls balance and coordination?

  1. Medulla only
  2. Cerebrum
  3. Thalamus
  4. Cerebellum
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Correct answer: D

Cerebellum

The cerebellum helps coordinate movement and maintain balance.

Biology · Question 272

Which hormone raises the blood glucose level?

  1. Oxytocin
  2. Glucagon
  3. Insulin
  4. Aldosterone
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Correct answer: B

Glucagon

Glucagon raises blood glucose by promoting hepatic glucose release.

Biology · Question 273

Thyroxine contains which element?

  1. Iron
  2. Calcium
  3. Sodium
  4. Iodine
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Correct answer: D

Iodine

Thyroxine, or T4, contains four iodine atoms.

Biology · Question 274

The main nitrogenous waste excreted by humans is:

  1. Creatinine only
  2. Urea
  3. Uric acid
  4. Ammonia only
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Correct answer: B

Urea

Urea is the principal nitrogen-containing waste produced from amino-acid metabolism in humans.

Chemistry · Question 275

The atomic number of carbon is:

  1. 8
  2. 14
  3. 12
  4. 6
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Correct answer: D

6

Carbon has six protons, giving atomic number 6.

Chemistry · Question 276

What is the usual valency of oxygen?

  1. 3
  2. 2
  3. 1
  4. 4
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Correct answer: B

2

Oxygen most commonly forms two covalent bonds and is conventionally assigned valency 2.

Chemistry · Question 277

Which gas is released when zinc reacts with dilute HCl?

  1. Chlorine
  2. Oxygen
  3. Carbon dioxide
  4. Hydrogen
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Correct answer: D

Hydrogen

Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen gas.

Chemistry · Question 278

The acid present in the human stomach is:

  1. Hydrochloric acid
  2. Sulphuric acid
  3. Acetic acid
  4. Nitric acid
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Correct answer: A

Hydrochloric acid

Gastric parietal cells secrete hydrochloric acid.

Chemistry · Question 279

At 25 degrees Celsius, an acidic aqueous solution has a pH:

  1. Equal to 7
  2. More than 7
  3. Exactly 14
  4. Less than 7
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Correct answer: D

Less than 7

At 25 degrees Celsius, an aqueous acidic solution has pH below 7.

Chemistry · Question 280

How many moles are there in 18 g of water (molar mass 18 g/mol)?

  1. 0.5
  2. 2
  3. 1
  4. 18
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Correct answer: C

1

Amount in moles equals mass divided by molar mass: 18/18 = 1 mol.