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Nursing Question Bank

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1265 available questions

Biology · Question 501

Failure of the palatal processes to fuse can cause:

  1. Microcephaly
  2. Osteoporosis
  3. Osteoarthritis
  4. Cleft palate
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Correct answer: D

Cleft palate

A cleft palate leaves an abnormal opening between the oral and nasal cavities and can impair feeding.

Biology · Question 502

Interstitial cell-stimulating hormone in males stimulates secretion of:

  1. Testosterone
  2. ADH
  3. Sperm cells
  4. Thyroxine
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Correct answer: A

Testosterone

ICSH, another name for LH in males, stimulates Leydig cells to secrete testosterone.

Biology · Question 503

Hyperactivity of the parathyroid glands can lead to:

  1. Graves disease
  2. Kidney stones
  3. Goitre
  4. Myxoedema
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Correct answer: B

Kidney stones

Excess parathyroid hormone raises blood calcium and can promote renal stone formation.

Biology · Question 504

Overactivity of the adrenal cortex can cause:

  1. Alzheimer disease
  2. Addison disease
  3. Graves disease
  4. Cushing syndrome
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Correct answer: D

Cushing syndrome

Excess glucocorticoid activity produces the features of Cushing syndrome.

Biology · Question 505

Which cells regulate the entry of carbon dioxide into a leaf?

  1. Xylem vessels
  2. Ordinary epidermal cells
  3. Guard cells
  4. Subsidiary cells only
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Correct answer: C

Guard cells

Guard cells open and close stomata, controlling carbon-dioxide entry and water loss.

Biology · Question 506

Approximately how many of the historically isolated restriction enzymes were commonly used in early recombinant-DNA work according to the source?

  1. 400
  2. 100
  3. 10
  4. 20
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Correct answer: D

20

The source distinguishes the many known restriction enzymes from the smaller group commonly used in routine recombinant-DNA work.

Biology · Question 507

More complex feeding relationships among organisms are represented by a:

  1. Food web
  2. Population curve
  3. Single trophic level
  4. Food chain
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Correct answer: A

Food web

A food web links multiple food chains and feeding relationships in an ecosystem.

Biology · Question 508

The sequence grass → sheep → human is an example of a:

  1. Food web
  2. Biogeochemical cycle
  3. Population pyramid
  4. Food chain
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Correct answer: D

Food chain

The sequence is a linear transfer of food energy from producer to successive consumers.

Biology · Question 509

A species in imminent danger of extinction throughout all or a significant part of its range is described as:

  1. Introduced
  2. Evolved
  3. Endangered
  4. Domesticated
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Correct answer: C

Endangered

An endangered species faces a very high risk of extinction in its natural range.

Biology · Question 510

Productivity in an aquatic ecosystem is determined principally by:

  1. Oxygen only
  2. Light only
  3. Nutrients only
  4. Light and nutrient availability
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Correct answer: D

Light and nutrient availability

Primary production in water is limited mainly by available light and essential nutrients.