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Nursing Question Bank

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1265 available questions

Biology · Question 251

The pigment that gives plants their green colour is:

  1. Carotene
  2. Haemoglobin
  3. Melanin
  4. Chlorophyll
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Correct answer: D

Chlorophyll

Chlorophyll absorbs light for photosynthesis and gives leaves their characteristic green colour.

Biology · Question 252

Glycolysis occurs in the:

  1. Nucleus
  2. Cytoplasm
  3. Mitochondrial matrix
  4. Chloroplast
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Correct answer: B

Cytoplasm

Glycolysis takes place in the cytosol, the fluid component of the cytoplasm.

Biology · Question 253

What is the net ATP gain per glucose molecule during glycolysis?

  1. 2
  2. 38
  3. 4
  4. 8
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Correct answer: A

2

Glycolysis produces four ATP but consumes two, giving a net gain of two ATP per glucose.

Biology · Question 254

What are the chemical end products of complete aerobic oxidation of glucose?

  1. Lactic acid
  2. Ethanol and carbon dioxide
  3. Oxygen and glucose
  4. Carbon dioxide and water
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Correct answer: D

Carbon dioxide and water

Complete aerobic oxidation of glucose produces carbon dioxide and water, with energy captured in ATP and released as heat.

Biology · Question 255

The father of genetics is:

  1. Robert Hooke
  2. Gregor Mendel
  3. Louis Pasteur
  4. Charles Darwin
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Correct answer: B

Gregor Mendel

Gregor Mendel established basic inheritance principles through pea-plant experiments.

Biology · Question 256

With complete dominance, what is the expected F2 phenotypic ratio for Aa crossed with Aa?

  1. 1:2:1
  2. 1:1
  3. 9:3:3:1
  4. 3:1
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Correct answer: D

3:1

With complete dominance, Aa crossed with Aa produces three dominant phenotypes to one recessive phenotype on average.

Biology · Question 257

ABO blood groups are an example of:

  1. Multiple alleles
  2. Incomplete dominance only
  3. Mutation
  4. Linkage
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Correct answer: A

Multiple alleles

The ABO system has three principal alleles in the population: IA, IB and i. IA and IB are codominant.

Biology · Question 258

The usual inherited forms of haemophilia A and B follow which inheritance pattern?

  1. X-linked recessive disorder
  2. Viral disease
  3. Dominant autosomal disorder
  4. Y-linked disorder
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Correct answer: A

X-linked recessive disorder

The usual inherited haemophilia A and B patterns are X-linked recessive.

Biology · Question 259

Thalassemia is a disorder of:

  1. Insulin production
  2. Haemoglobin synthesis
  3. Nerve conduction
  4. Bone formation
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Correct answer: B

Haemoglobin synthesis

Thalassaemias involve reduced synthesis of alpha or beta globin chains of haemoglobin.

Biology · Question 260

The natural pacemaker of the heart is the:

  1. Bundle of His
  2. SA node
  3. Purkinje fibres
  4. AV node
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Correct answer: B

SA node

The sinoatrial node normally initiates the heartbeat.