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NEET • BIOLOGY • DIGESTION AND ABSORPTION

Digestion and absorption practice · Mixed difficulty

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91 Hard

91 of 255

Analyzing +4 | -1

Read carefully the following statements regarding the absorption of nutrients. Find the incorrect statements and choose the correct option from the given below codes
I. Absorption of carbohydrates takes place in the stomach and jejunum part of intestine
II. The water soluble end products of food can reach the blood and lymph directly
III. Large intestine and buccal cavity do not functions as the site of absorption
IV. Large intestine is the site of absorption of about 90% of the total water present in the hydrolysed food
Codes

View answer and explanation

Correct option: D

III and IV are incorrect

Option C (I and II are incorrect) is correct because carbohydrate absorption mainly occurs in the small intestine (not the stomach), and water-soluble nutrients are absorbed into the blood, not directly into the lymph.

92 Easy

92 of 255

Understanding +4 | -1

The ____ is primarily a storage chamber within the digestive system, while the ___ reabsorbs water, ions, and generates the faeces.

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Correct option: C

Stomach; hindgut

Option C (Stomach; hindgut) is correct because the stomach is primarily a storage chamber, and the hindgut reabsorbs water and forms feces.

93 Medium

93 of 255

Remembering +4 | -1

Vitamin necessary for normal functioning of liver, clotting of blood and preventing haemorrhage is

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Correct option: B

Phylloquinone

Option B (Phylloquinone) is correct because Phylloquinone (Vitamin K) is essential for blood clotting and liver function.

94 Easy

94 of 255

Remembering +4 | -1

Which of the following is called as a detritivore?

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Correct option: A

An animal feeding on decaying organic matter

Option A (An animal feeding on decaying organic matter) is correct because detritivores are organisms that consume dead organic material.

95 Easy

95 of 255

Remembering +4 | -1

Which component of gastric juices inactivates salivary amylase?

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Correct option: C

HCl

Option C (HCl) is correct because hydrochloric acid secreted by parietal cells inactivates salivary amylase by denaturing it.

96 Easy

96 of 255

Remembering +4 | -1

Wisdom teeth in human is

View answer and explanation

Correct option: A

{3^{rd}}

molar and 4 in number

Option A (

{3^{rd}}

molar and 4 in number) is correct because wisdom teeth are the third molars, and humans typically have four of them (one in each quadrant).

97 Medium

97 of 255

Understanding +4 | -1

With reference to a normal human being, which one of the following statements is not correct?

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Correct option: C

Saliva is secreted by six pairs of salivary glands in human beings

Option C (Saliva is secreted by six pairs of salivary glands in human beings) is correct because humans have three pairs of major salivary glands, not six.

98 Medium

98 of 255

Understanding +4 | -1

Lipids, Which can be found in oil based salad dressings and ice cream, during digestion are splitted into

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Correct option: A

Fatty acids and glycerol

Option A (Fatty acids and glycerol) is correct because lipids are broken down into fatty acids and glycerol during digestion.

99 Easy

99 of 255

Understanding +4 | -1

Why the eyes of the patients turns yellow during jaundice?

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Correct option: A

Due to the deposition of bile pigments

Option A (Due to the deposition of bile pigments) is correct because jaundice is characterized by the yellowing of the skin and eyes due to the accumulation of bilirubin, a bile pigment, in the body's tissues.

100 Medium

100 of 255

Understanding +4 | -1

In infant, the process of defecation occurs by

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Correct option: A

Reflex action without voluntary control

Option A (Reflex action without voluntary control) is correct because infants lack the voluntary control over the external anal sphincter necessary for conscious defecation.

101 Easy

101 of 255

Remembering +4 | -1

Maximum absorption of water occurs in

View answer and explanation

Correct option: A

Colon

Option A (Colon) is correct because the colon is the primary site for water absorption in the large intestine.

102 Medium

102 of 255

Remembering +4 | -1

Which teeth of human are shovel-shaped and used for nibbling, cutting and tearing?

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Correct option: A

Canines

Option A (Canines) is the correct answer because canines are shovel-shaped teeth used for tearing food.

103 Easy

103 of 255

Understanding +4 | -1

What do you mean by the process of digestion?

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Correct option: A

Conversion of complex substances into simpler form

Option A (Conversion of complex substances into simpler form) is correct because digestion is the process of breaking down complex food molecules into smaller, absorbable units.

104 Hard

104 of 255

Remembering +4 | -1

Generally, new born babies shows a symptoms of a mild form of jaundice which is known as

View answer and explanation

Correct option: D

Physiological jaundice

Option D (Physiological jaundice) is correct because newborn babies often exhibit a mild form of jaundice due to the immature liver's inability to process bilirubin efficiently, which is termed physiological jaundice.

105 Easy

105 of 255

Remembering +4 | -1

Which is the largest gland of human body?

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Correct option: C

Liver

Option C (Liver) is correct because the liver is the largest gland in the human body.

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106 Medium

106 of 255

Remembering +4 | -1

Which one of the following is a fat-soluble vitamin and its related deficiency disease?

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Correct option: B

Retinol - Xerophthalmia

Option B (Retinol - Xerophthalmia) is correct because retinol (Vitamin A) deficiency leads to xerophthalmia, a condition characterized by dry eyes.

107 Easy

107 of 255

Understanding +4 | -1

Which of the following can be caused by anxiety, food poisoning, over eating and spicy food?

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Correct option: A

Indigestion

Option A (Indigestion) is correct because anxiety, food poisoning, overeating, and spicy food can disrupt the normal digestive process, leading to indigestion, which is characterized by discomfort and a feeling of fullness.

108 Hard

108 of 255

Analyzing +4 | -1

Consider the following statements regarding the digestion and absorption of food in human and identify the correct and incorrect statement
I. Antipellagra vitamin is nicotinamide which is present in milk, yeast, meat, leafy vegetable and whole grains
II. Deficiency of vitamin thiamine causes loss of appetite, muscle depreciation, fatigue and mental confusion
III. Prolonged deficiency of tocopherol reduces reproductive capacity in human being
IV. Gastrovascular cavity performs, i.e., both function digestion and distribution of nutrients
Choose the correct option accordingly

View answer and explanation

Correct option: A

All statements are incorrect

Option A (All statements are incorrect) is the correct answer because all the statements contain inaccuracies regarding vitamins and their functions.

109 Medium

109 of 255

Application +4 | -1

A woman consumes 100 gm boiled eggs, 70 gm of green leafy vegetables, 25 gm of butter and 150 gm of wheat bread in breakfast and lunch. What is the result of net Kcal intake by her?

View answer and explanation

Correct option: A

1505

Option A (1505) is correct because the calculation involves multiplying the grams of each food type by its caloric value (eggs and bread: ~4 kcal/g, vegetables: ~0.5 kcal/g, butter: ~9 kcal/g) and summing them up.

110 Medium

110 of 255

Analyzing +4 | -1

Both tripeptides and dipeptides are formed due to the action of all of the following except

View answer and explanation

Correct option: D

Tripeptidase

Option D (Tripeptidase) is correct because tripeptidase specifically breaks down tripeptides into amino acids, it doesn't form them.

111 Medium

111 of 255

Understanding +4 | -1

Which one of the following inhibits the coagulation of blood in the human circulatory system?

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Correct option: B

Liver, situated in the upper right side of abdominal cavity

Option B (Liver, situated in the upper right side of abdominal cavity) is correct because the liver produces heparin, an anticoagulant that inhibits blood coagulation.

112 Medium

112 of 255

Analyzing +4 | -1

Assertion: Sea-faring fishermen sometimes eat
raw fish.

Reason: They can be deficient of Vitamin

{B_1}

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option A is correct because sea-faring fishermen eating raw fish can be attributed to a potential Vitamin B1 deficiency, making the reason a valid explanation for the assertion.

113 Hard

113 of 255

Remembering +4 | -1

Pyloric sphincter guards the opening between

View answer and explanation

Correct option: A

Stomach and duodenum

Option A (Stomach and duodenum) is correct because the pyloric sphincter controls the passage of chyme from the stomach into the duodenum.

114 Easy

114 of 255

Remembering +4 | -1

The stored food in animals is called

View answer and explanation

Correct option: D

Glycogen

Option D (Glycogen) is correct because glycogen is the storage form of glucose in animals.

115 Medium

115 of 255

Remembering +4 | -1

Osteomalacia is due to deficiency of

View answer and explanation

Correct option: D

Vitamin-D

Option D (Vitamin-D) is correct because Vitamin D deficiency leads to impaired bone mineralization, causing osteomalacia in adults and rickets in children.

116 Easy

116 of 255

Remembering +4 | -1

The islets of Langerhans are found in

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Correct option: A

Pancreas

The correct answer is A (Pancreas) because the islets of Langerhans are endocrine cells located within the pancreas, responsible for producing hormones like insulin and glucagon.

117 Easy

117 of 255

Understanding +4 | -1

Least peristalsis occurs in

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Correct option: C

Oesophagus

Option A is correct because peristalsis, the wave-like muscle contractions that move food, is least frequent in the esophagus compared to other parts of the digestive tract.

118 Hard

118 of 255

Remembering +4 | -1

Incorrect match among the following is

View answer and explanation

Correct option: C

NADP - Co-factor that contains vitamin

\mathrm{B}_9

Option C (NADP - Co-factor that contains vitamin

\mathrm{B}_9

) is correct because NADP does not contain vitamin B9. Folic acid (Vitamin B9) is a precursor to tetrahydrofolate, which is a coenzyme involved in various metabolic processes.

119 Easy

119 of 255

Remembering +4 | -1

Which of the following is regarded as the source of instant energy?

View answer and explanation

Correct option: C

Carbohydrates only

Option C (Carbohydrates only) is correct because carbohydrates are readily broken down into glucose, providing a quick source of energy.

120 Medium

120 of 255

Remembering +4 | -1

Which one of the following pair of simple sugar absorption occurs most rapidly in the jejunum and stomach?

View answer and explanation

Correct option: B

Glucose and galactose

Option B (Glucose and galactose) is correct because glucose and galactose are actively transported across the intestinal epithelium, leading to faster absorption compared to fructose.

Revision notes and key takeaways

Review DIGESTION AND ABSORPTION in your textbook or class notes, then use this set to check your understanding.

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Digestion and absorption practice · Mixed difficulty

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