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Nursing Question Bank

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1265 available questions

Physics · Question 151

A 12 V supply is connected across a 4 ohm resistor. What current flows?

  1. 0.33 A
  2. 3 A
  3. 8 A
  4. 48 A
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Correct answer: B

3 A

Ohm's law gives I = V/R = 12/4 = 3 A.

Physics · Question 152

What is the equivalent resistance of 3 ohm and 5 ohm resistors connected in series?

  1. 2 ohms
  2. 8 ohms
  3. 15 ohms
  4. 1.875 ohms
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Correct answer: B

8 ohms

Series resistances add: 3 + 5 = 8 ohms.

Physics · Question 153

Two 6 ohm resistors are connected in parallel. What is their equivalent resistance?

  1. 12 ohms
  2. 36 ohms
  3. 3 ohms
  4. 6 ohms
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Correct answer: C

3 ohms

For two identical parallel resistors, the equivalent resistance is half either resistance: 3 ohms.

Biology · Question 154

The scientific study of bacteria is called:

  1. Virology
  2. Bacteriology
  3. Protozoology
  4. Mycology
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Correct answer: B

Bacteriology

Bacteriology is the branch of microbiology concerned with bacteria.

Biology · Question 155

Spherical-shaped bacteria are called:

  1. Spirilla
  2. Cocci
  3. Bacilli
  4. Vibrios
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Correct answer: B

Cocci

Cocci are spherical bacteria; bacilli are rod-shaped.

Biology · Question 156

Bacteria mainly reproduce by:

  1. Spore formation only
  2. Mitosis
  3. Binary fission
  4. Budding
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Correct answer: C

Binary fission

Most bacteria reproduce by binary fission, dividing one cell into two.

Biology · Question 157

Gram-positive bacteria stain:

  1. Pink
  2. Colourless
  3. Green
  4. Purple / violet
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Correct answer: D

Purple / violet

Gram-positive cells retain the crystal violet-iodine complex after proper Gram staining.

Biology · Question 158

In a healthy adult, red blood cells are produced mainly in the:

  1. Pancreas
  2. Red bone marrow
  3. Kidney
  4. Liver of an adult
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Correct answer: B

Red bone marrow

In healthy adults, red blood cells develop in red bone marrow.

Biology · Question 159

Haemoglobin contains which metal?

  1. Copper
  2. Zinc
  3. Iron
  4. Magnesium
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Correct answer: C

Iron

Haemoglobin contains iron within its haem groups.

Biology · Question 160

In the ABO and RhD classification, which group is commonly called the universal red-cell donor?

  1. B negative
  2. O negative
  3. AB positive
  4. A positive
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Correct answer: B

O negative

O-negative red cells lack A, B and RhD antigens. This universal-donor label concerns red cells, not plasma; compatibility testing remains important.