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Nursing Question Bank

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1265 available questions

Biology · Question 381

The usual sex-chromosome constitution of a male grasshopper in an XO system is:

  1. XX
  2. XY
  3. XO
  4. YY
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Correct answer: C

XO

In the XO system, females are XX and males possess a single X chromosome.

Biology · Question 382

Peptide hormones made by neurosecretory neurons are synthesised mainly in the:

  1. Axon terminal
  2. Cell body
  3. Myelin sheath
  4. Synaptic cleft
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Correct answer: B

Cell body

Protein and peptide synthesis occurs in the neuronal cell body before products are transported along the axon.

Biology · Question 383

Blood pressure is normally higher in arteries than in veins because arteries receive blood:

  1. Directly under pressure generated by the heart
  2. Only after capillary exchange
  3. Without any pulse
  4. At zero hydrostatic pressure
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Correct answer: A

Directly under pressure generated by the heart

Arteries receive blood pumped by the heart and therefore operate at higher pressure than veins.

Biology · Question 384

Antagonistic muscles are muscles that:

  1. Always contract together to make the same movement
  2. Produce opposing actions at a joint
  3. Have no tendons
  4. Occur only in the heart
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Correct answer: B

Produce opposing actions at a joint

An antagonistic pair produces opposite movements; as one contracts, the other usually relaxes.

Chemistry · Question 385

Which compound has approximately the same molar mass as ethanoic acid, CH3COOH?

  1. Methanol
  2. Propan-1-ol
  3. Butane
  4. Ethene
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Correct answer: B

Propan-1-ol

Ethanoic acid and propan-1-ol both have molar masses close to 60 g/mol.

Chemistry · Question 386

An aqueous solution of ammonium chloride is generally:

  1. Acidic
  2. Basic
  3. Always neutral
  4. A non-electrolyte
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Correct answer: A

Acidic

NH4+ is the conjugate acid of the weak base ammonia and hydrolyses to make the solution acidic.

Chemistry · Question 387

Which formula represents potassium superoxide?

  1. K2O
  2. K2O2
  3. KO2
  4. KOH
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Correct answer: C

KO2

Potassium reacts with excess oxygen to form the superoxide KO2.

Chemistry · Question 388

Gold belongs to which traditional group of metals?

  1. Alkali metals
  2. Coinage metals
  3. Halogens
  4. Lanthanides
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Correct answer: B

Coinage metals

Copper, silver and gold are traditionally called the coinage metals.

Chemistry · Question 389

Which observation can help distinguish a low-molar-mass ether from an alkane?

  1. The ether is generally more soluble in water
  2. The alkane is ionic
  3. The ether contains nitrogen
  4. The alkane gives an acidic solution
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Correct answer: A

The ether is generally more soluble in water

The oxygen atom of an ether can accept hydrogen bonds from water, making small ethers more water-soluble than comparable alkanes.

Chemistry · Question 390

Compounds with analogous composition that crystallise in the same form are described as:

  1. Allotropes
  2. Isomorphous
  3. Isotopes
  4. Enantiomers
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Correct answer: B

Isomorphous

Isomorphous compounds have similar composition and the same crystal form.