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Nursing Question Bank

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1265 available questions

Physics · Question 371

The escape velocity from Jupiter is approximately:

  1. 11.2 km/s
  2. 24 km/s
  3. 59.5 km/s
  4. 300 km/s
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Correct answer: C

59.5 km/s

Jupiter's escape velocity is about 59.5 km/s.

Physics · Question 372

Bernoulli's equation for ideal steady flow follows from conservation of:

  1. Mass only
  2. Electric charge
  3. Mechanical energy
  4. Linear momentum only
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Correct answer: C

Mechanical energy

Bernoulli's equation relates pressure, kinetic and gravitational potential energy per unit volume.

Physics · Question 373

Which semiconductor component is commonly used for rectification?

  1. Diode
  2. Capacitor
  3. Inductor
  4. Transformer core
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Correct answer: A

Diode

A diode permits current mainly in one direction and is used to rectify alternating current.

Biology · Question 374

The P wave of a normal electrocardiogram represents:

  1. Ventricular depolarisation
  2. Atrial depolarisation
  3. Ventricular repolarisation
  4. Closure of semilunar valves
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Correct answer: B

Atrial depolarisation

The P wave is generated by electrical depolarisation of the atria.

Biology · Question 375

Which genus includes important denitrifying bacteria that convert nitrate into gaseous nitrogen compounds?

  1. Lactobacillus
  2. Pseudomonas
  3. Rhizobium
  4. Streptococcus
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Correct answer: B

Pseudomonas

Several Pseudomonas species perform denitrification under low-oxygen conditions.

Biology · Question 376

Which is the most abundant protein in human blood plasma?

  1. Haemoglobin
  2. Albumin
  3. Keratin
  4. Myosin
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Correct answer: B

Albumin

Albumin is the most abundant plasma protein and contributes strongly to oncotic pressure.

Biology · Question 377

Smooth muscle is generally described as:

  1. Voluntary and striated
  2. Involuntary and non-striated
  3. Voluntary and multinucleated
  4. Involuntary and branched
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Correct answer: B

Involuntary and non-striated

Smooth muscle is non-striated and is controlled involuntarily.

Biology · Question 378

Which accessory pigment is characteristic of cyanobacteria?

  1. Phycocyanin
  2. Melanin
  3. Haemoglobin
  4. Rhodopsin
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Correct answer: A

Phycocyanin

Cyanobacteria contain phycobilin pigments, including phycocyanin.

Biology · Question 379

The 5-prime cap added to most eukaryotic messenger RNA contains:

  1. Adenosine triphosphate
  2. 7-methylguanosine
  3. Thymidine
  4. Uracil only
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Correct answer: B

7-methylguanosine

The eukaryotic mRNA cap is a modified guanine nucleotide called 7-methylguanosine.

Biology · Question 380

Many photosynthetic sulfur bacteria use which substance as an electron donor instead of water?

  1. Hydrogen sulfide
  2. Carbon dioxide
  3. Nitrogen gas
  4. Glucose
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Correct answer: A

Hydrogen sulfide

Sulfur bacteria can use H2S as an electron donor and may produce sulfur rather than oxygen.