JAMB and WAEC Biology questions

791 questions with answers and explanations. Tap an option to check yourself.

All topics Cell structure and organisation · 56 Cellular activities · 56 Co-ordination and control · 58 Ecology · 71 Evolution · 45 Excretion · 52 Growth · 45 Heredity and variation · 60 Nutrition · 64 Reproduction · 62 Respiration · 55 Support and movement · 50 Transport · 57 Variety of organisms · 60

Question 581· Respiration· JAMB
Fish exchange gases through their
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Answer: B. gills
Explanation and discussion
Question 582· Respiration· WAEC
Dough rises during bread-making because of
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Answer: C. carbon(IV) oxide released by yeast
Explanation and discussion
Question 583· Respiration· JAMB
Insects exchange gases through
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Answer: B. a system of tracheae opening at spiracles
Explanation and discussion
Question 584· Respiration· WAEC
Anaerobic respiration in muscles produces
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Answer: A. lactic acid
Explanation and discussion
Question 585· Respiration· JAMB
Which word equation represents aerobic respiration?
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Answer: A. glucose + oxygen → carbon(IV) oxide + water + energy
Explanation and discussion
Question 586· Respiration· JAMB
Anaerobic respiration in yeast is also called
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Answer: C. fermentation
Explanation and discussion
Question 587· Respiration· WAEC
During expiration in humans, the diaphragm
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Answer: A. relaxes and becomes dome-shaped
Explanation and discussion
Question 588· Respiration· JAMB
The volume of air breathed in or out in one normal breath is the
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Answer: C. tidal volume
Explanation and discussion
Question 589· Respiration· WAEC
Which of these gives off the most energy per gram when respired?
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Answer: D. fat
Explanation and discussion
Question 590· Respiration· JAMB
During inhalation in humans, the diaphragm
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Answer: A. contracts and flattens
Explanation and discussion
Question 591· Respiration· WAEC
Gaseous exchange in the human lungs takes place in the
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Answer: C. alveoli
Explanation and discussion
Question 592· Respiration· JAMB
The respiratory quotient (RQ) when carbohydrate is respired aerobically is
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Answer: C. 1.0
Explanation and discussion
Question 593· Respiration· JAMB
Yeast is used in baking bread because it produces
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Answer: D. carbon(IV) oxide, which makes the dough rise
Explanation and discussion
Question 594· Respiration· WAEC
The energy-carrying molecule produced in respiration is
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Answer: A. ATP
Explanation and discussion
Question 595· Respiration· JAMB
The Krebs cycle takes place in the
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Answer: D. matrix of the mitochondria
Explanation and discussion
Question 596· Respiration· WAEC
During inspiration in man, the diaphragm
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Answer: D. contracts and flattens
Explanation and discussion
Question 597· Respiration· WAEC
Which of these is a product of anaerobic respiration in human muscles?
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Answer: B. lactic acid
Explanation and discussion
Question 598· Respiration· JAMB
Exhaled air turns lime water milky because it contains more
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Answer: B. carbon(IV) oxide
Explanation and discussion
Question 599· Respiration· WAEC
Yeast respiring anaerobically in dough makes bread rise because it produces
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Answer: A. carbon dioxide
Explanation and discussion
Question 600· Respiration· JAMB
In a fish, water flows over the gills in the opposite direction to the blood. This counter-current flow
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Answer: A. maximises the uptake of oxygen
Explanation and discussion

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JAMB and WAEC Biology questions

Fish exchange gases through their

Dough rises during bread-making because of

Insects exchange gases through

Anaerobic respiration in muscles produces

Which word equation represents aerobic respiration?

Anaerobic respiration in yeast is also called

During expiration in humans, the diaphragm

The volume of air breathed in or out in one normal breath is the

Which of these gives off the most energy per gram when respired?

During inhalation in humans, the diaphragm

Gaseous exchange in the human lungs takes place in the

The respiratory quotient (RQ) when carbohydrate is respired aerobically is

Yeast is used in baking bread because it produces

The energy-carrying molecule produced in respiration is

The Krebs cycle takes place in the

During inspiration in man, the diaphragm

Which of these is a product of anaerobic respiration in human muscles?

Exhaled air turns lime water milky because it contains more

Yeast respiring anaerobically in dough makes bread rise because it produces

In a fish, water flows over the gills in the opposite direction to the blood. This counter-current flow