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 461· Nutrition· WAEC
The enzyme in saliva that begins the digestion of starch is
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Answer: D. ptyalin
Explanation and discussion
Question 462· Nutrition· JAMB
Herbivores such as cattle lack canine teeth and have a gap called the
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Answer: D. diastema
Explanation and discussion
Question 463· Nutrition· JAMB
Before an experiment on photosynthesis, a potted plant is kept in darkness for 48 hours in order to
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Answer: A. remove the starch already present in its leaves
Explanation and discussion
Question 464· Nutrition· JAMB
Trypsin is secreted by the
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Answer: D. pancreas
Explanation and discussion
Question 465· Nutrition· WAEC
Benedict's solution gives a brick-red precipitate on heating with
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Answer: D. reducing sugar
Explanation and discussion
Question 466· Nutrition· WAEC
The enzyme in human saliva acts on
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Answer: D. starch, changing it to maltose
Explanation and discussion
Question 467· Nutrition· WAEC
Iodine solution turning blue-black shows the presence of
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Answer: D. starch
Explanation and discussion
Question 468· Nutrition· JAMB
Bile aids digestion by
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Answer: A. emulsifying fats
Explanation and discussion
Question 469· Nutrition· WAEC
The by-product of photosynthesis is
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Answer: C. oxygen
Explanation and discussion
Question 470· Nutrition· JAMB
To show that a leaf has carried out photosynthesis, it is tested with iodine solution for
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Answer: C. starch
Explanation and discussion
Question 471· Nutrition· JAMB
Trypsin digests proteins in the
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Answer: A. duodenum
Explanation and discussion
Question 472· Nutrition· JAMB
Villi are well adapted for absorption because they have
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Answer: C. a thin lining, a rich blood supply and a large surface area
Explanation and discussion
Question 473· Nutrition· JAMB
The main function of the colon is the
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Answer: A. absorption of water
Explanation and discussion
Question 474· Nutrition· WAEC
The enzyme pepsin is found in the
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Answer: C. stomach
Explanation and discussion
Question 475· Nutrition· JAMB
A lack of iron in the diet causes
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Answer: C. anaemia
Explanation and discussion
Question 476· Nutrition· JAMB
The light stage of photosynthesis produces
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Answer: B. ATP, reduced NADP and oxygen
Explanation and discussion
Question 477· Nutrition· JAMB
Which enzyme in saliva begins the digestion of starch?
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Answer: B. ptyalin (salivary amylase)
Explanation and discussion
Question 478· Nutrition· WAEC
A child with stunted growth, thin limbs and very low body weight from lack of energy foods suffers from
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Answer: B. marasmus
Explanation and discussion
Question 479· Nutrition· JAMB
Carnassial teeth are characteristic of
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Answer: A. carnivores
Explanation and discussion
Question 480· Nutrition· JAMB
The enzyme that begins the digestion of proteins in the stomach is
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Answer: D. pepsin
Explanation and discussion

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JAMB and WAEC Biology questions

The enzyme in saliva that begins the digestion of starch is

Herbivores such as cattle lack canine teeth and have a gap called the

Before an experiment on photosynthesis, a potted plant is kept in darkness for 48 hours in order to

Trypsin is secreted by the

Benedict's solution gives a brick-red precipitate on heating with

The enzyme in human saliva acts on

Iodine solution turning blue-black shows the presence of

Bile aids digestion by

The by-product of photosynthesis is

To show that a leaf has carried out photosynthesis, it is tested with iodine solution for

Trypsin digests proteins in the

Villi are well adapted for absorption because they have

The main function of the colon is the

The enzyme pepsin is found in the

A lack of iron in the diet causes

The light stage of photosynthesis produces

Which enzyme in saliva begins the digestion of starch?

A child with stunted growth, thin limbs and very low body weight from lack of energy foods suffers from

Carnassial teeth are characteristic of

The enzyme that begins the digestion of proteins in the stomach is