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NEET • BIOLOGY • DIGESTION AND ABSORPTION

Digestion and absorption practice · Mixed difficulty

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121 Hard

121 of 255

Remembering +4 | -1

Which two ducts are responsible for the formation of a duct that carry bile from the gall bladder and conduct it into the first section of the gall bladder and conduct it into the first section of the small intestine?

View answer and explanation

Correct option: D

4 and 1

Option D (4 and 1) is correct because the common bile duct is formed by the union of the hepatic duct (1) and the cystic duct (4).

122 Medium

122 of 255

Remembering +4 | -1

Which of the following scales are similar to mammalian teeth?

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Correct option: B

Placoid

Option B (Placoid) is correct because placoid scales, found in cartilaginous fish, are structurally similar to mammalian teeth, both containing enamel, dentin, and pulp.

123 Medium

123 of 255

Remembering +4 | -1

The enzyme enterokinase helps in conversion of

View answer and explanation

Correct option: B

trypsinogen into trypsin

Option B (trypsinogen into trypsin) is correct because enterokinase converts the inactive trypsinogen into its active form, trypsin.

124 Medium

124 of 255

Analyzing +4 | -1

Assertion: Trypsin helps in blood digestion of predator animals.
Reason: Trypsin hydrolyses fibrinogen.

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Option A is correct because trypsin aids in blood digestion of predators by hydrolyzing fibrinogen, which is a key component in blood clotting.

125 Medium

125 of 255

Understanding +4 | -1

Which one of the following elements is essential for the life of animal and not for plants?

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Correct option: B

Iodine

Option B is correct because Iodine is essential for thyroid hormone production in animals but is not considered essential for plant life.

126 Medium

126 of 255

Analyzing +4 | -1

Go through the following statements regarding the absorption of fats. Find correct and incorrect statements and choose an option accordingly from the codes given below.
I. Micelles and chylomicron are concerned with the absorption of fats
II. Chylomicrons are water soluble dropelets of fat which contains triglycerides, sterol and phospholipids
III. Micelles are water soluble droplets of fatty acids and glycerols which are formed by the action of bile pigments on fats and glycerol
IV. Chylomicron, protein coated small vesicles are released from the intestinal cells into the blood stream by lacteals

View answer and explanation

Correct option: B

I, III and IV are correct, while II is incorrect

Option C (I, II and IV are correct while III is incorrect) is correct because it accurately identifies the true and false statements regarding fat absorption.

127 Hard

127 of 255

Remembering +4 | -1

Inactive enzyme in the pancreatic juice is

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Correct option: B

Procarboxypeptidase

Option B (Procarboxypeptidase) is correct because it is an inactive enzyme (zymogen) secreted by the pancreas that is later activated in the small intestine.

128 Medium

128 of 255

Understanding +4 | -1

Which one of the following sequence is in correct order?

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Correct option: A

Descending colon → Rectum → Anus

Option A is correct because the descending colon leads into the rectum, which then connects to the anus.

129 Hard

129 of 255

Remembering +4 | -1

Deficiency of which vitamin causes type 1 and type 2 diabetes?

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Correct option: C

Vitamin-D

Option C (Vitamin-D) is correct because Vitamin D plays a crucial role in insulin secretion and insulin sensitivity, and its deficiency is associated with an increased risk of both type 1 and type 2 diabetes.

130 Medium

130 of 255

Analyzing +4 | -1

Assertion: Trypsin cannot hydrolyse milk proteins.

Reason: Trypsin functions at an acidic pH.

View answer and explanation

Correct option: B

Assertion is correct but Reason is not correct

Option B (Assertion is correct but Reason is not correct) is correct because trypsin does not hydrolyze milk proteins, but it functions at an alkaline pH, not acidic.

131 Medium

131 of 255

Application +4 | -1

If a person takes 100 gm. Carbohydrates, 60 gm proteins and 30 gm fat. Then how much amount of energy he get

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Correct option: B

910 kcal

Option B (910 kcal) is correct because carbohydrates and proteins provide 4 kcal/g, while fats provide 9 kcal/g. The total energy is calculated by multiplying the grams of each macronutrient by its caloric value and summing them.

132 Easy

132 of 255

Understanding +4 | -1

The secretion of less than normal amount of the hormone gastrin would have which effect?

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Correct option: B

Protein digestion in the stomach would decrease

Option B (Protein digestion in the stomach would decrease) is correct because gastrin stimulates HCl and pepsinogen secretion, both crucial for protein digestion.

133 Hard

133 of 255

Understanding +4 | -1

Note the following
I. Dentition is heterodont.
II. Canines are poorly developed.
III. Incisors are chisel-like poorly developed.
IV. Herbivorous and diastema is present.
V. The dental formula is I 2/1, C 0/0, Pm 3/2, M 3/3
Which of the above are true for Oryctolagus?

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Correct option: B

I, IV and V

Option B (I, IV and V) is correct because Oryctolagus (rabbit) has heterodont dentition, is herbivorous with a diastema, and has the given dental formula.

134 Easy

134 of 255

Understanding +4 | -1

Which of the following secretions gets mixed with the food (hydrolysed) in the small intestine?

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Correct option: A

Bile, pancreatic juices and intestinal juices

Option A (Bile, pancreatic juices and intestinal juices) is correct because these secretions contain enzymes and substances that hydrolyze food in the small intestine.

135 Easy

135 of 255

Understanding +4 | -1

By which process, the end products of milk sugar in small intestine are absorbed?

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Correct option: D

All

Option D is correct because the end products of milk sugar (lactose) digestion, such as glucose and galactose, can be absorbed through passive transport, active transport, and facilitated transport in the small intestine.

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136 Hard

136 of 255

Remembering +4 | -1

Which of the following guards the opening of common bile duct into pancreatic duct?

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Correct option: A

Sphincter of Boyden

Option A (Sphincter of Boyden) is correct because the Sphincter of Boyden regulates the flow of bile into the duodenum.

137 Hard

137 of 255

Remembering +4 | -1

Which of the following is an accessory organ of digestion?

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Correct option: B

Pancreas

Option B is correct because the pancreas is an accessory organ of digestion, secreting enzymes and hormones that aid in the digestive process.

138 Medium

138 of 255

Remembering +4 | -1

Pepsinogen (inactive form) is converted into active form of enzyme pepsin with the help of which of the following compound?

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Correct option: B

Hydrochloric acid

The correct answer is B (Hydrochloric acid) because hydrochloric acid (HCl) secreted by parietal cells converts pepsinogen, the inactive form, into pepsin, the active enzyme.

139 Easy

139 of 255

Remembering +4 | -1

Stomach located on the upper left portion of abdominal cavity has three parts, a …A… portion into which the oesophagus open, a …B… region and a …C… portion, which opens into small intestine.
Identify A, B and C to complete the given NCERT statement and choose the correct option accordingly

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Correct option: A

A-cardiac, B-fundic, C-pyloric

Option A (A-cardiac, B-fundic, C-pyloric) is correct because the stomach has three main regions: the cardiac region where the esophagus opens, the fundic region, and the pyloric region that connects to the small intestine.

140 Hard

140 of 255

Remembering +4 | -1

What is the correct dental formula of rat?

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Correct option: D

\mathrm{I}\frac{1}{1},\mathrm{C}\frac{0}{0},\mathrm{PM}\frac{0}{0},\mathrm{M}\frac{3}{3}

Option D (

\mathrm{I}\frac{1}{1},\mathrm{C}\frac{0}{0},\mathrm{PM}\frac{0}{0},\mathrm{M}\frac{3}{3}

) is correct because it represents the number and arrangement of incisors, canines, premolars, and molars in one half of the upper and lower jaw of a rat.

141 Medium

141 of 255

Remembering +4 | -1

Camel in its hump, stores

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Correct option: B

Fat for emergency

Option B (Fat for emergency) is correct because the camel's hump primarily stores fat, which can be metabolized to provide energy and water when needed.

142 Easy

142 of 255

Remembering +4 | -1

Vitamin-

{B_1}

, responsible for normal working of human being, can be best obtained from

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because vitamin B1 can be obtained from green vegetables, fruits, meat, and lentils.

143 Hard

143 of 255

Remembering +4 | -1

Liver, in our body stores:

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Correct option: D

All of these

Option D (All of these) is correct because the liver stores various vitamins, including Vitamin A, Vitamin D, and Vitamin B

{}_{12}

144 Hard

144 of 255

Remembering +4 | -1

Parotid salivary glands are present:

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Correct option: B

Below the cheeks

The correct answer is B (Below the cheeks) because the parotid salivary glands are located on the sides of the face, below the cheeks, near the ears.

145 Easy

145 of 255

Remembering +4 | -1

Which part of small intestine opens into large intestine?

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Correct option: C

Ileum

Option C (Ileum) is correct because the ileum is the final section of the small intestine and it connects to the large intestine at the ileocecal valve.

146 Medium

146 of 255

Understanding +4 | -1

In the process of digestion and absorption, the peristalsis movement in alimentary canal from oesophagus to rectum is produced by

View answer and explanation

Correct option: A

Unstriped muscle of muscular coat

Option A (Unstriped muscle of muscular coat) is correct because peristalsis is caused by the contraction and relaxation of the smooth muscles in the muscularis externa.

147 Hard

147 of 255

Remembering +4 | -1

Intestinal lymphangiectasia is characterised by

View answer and explanation

Correct option: A

Dilated intestinal lacteals

Option A (Dilated intestinal lacteals) is correct because intestinal lymphangiectasia is characterized by dilated lacteals, which are lymphatic vessels in the small intestine.

148 Medium

148 of 255

Remembering +4 | -1

Choose the incorrect statement regarding human digestive system with reference to a normal person

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Correct option: B

In human being, four pair of salivary gland secretes saliva

The correct answer is B (In human being, four pair of salivary gland secretes saliva) because humans have three pairs of major salivary glands: parotid, submandibular, and sublingual.

149 Hard

149 of 255

Understanding +4 | -1

Which of the following statements are correct?

A. The chemical process of digestion is initiated in oral cavity by the hydrolytic action of the carbohydrate
splitting enzyme, the salivary amylase.

B. Lipases are absent in secretion of gastric glands.

C. Bile helps in emulsification of fats.

D. Nucleases in the succusentericus acts on nucleic acids to form nucleotides and nucleosides.

View answer and explanation

Correct option: B

A, C

Option B (A, C) is correct because the chemical process of digestion is initiated in the oral cavity by salivary amylase, and bile helps in emulsification of fats.

150 Hard

150 of 255

Remembering +4 | -1

In elephants the tusks are:

View answer and explanation

Correct option: A

Incisors

Option A (Incisors) is correct because elephant tusks are modified incisors, which are the front teeth.

Revision notes and key takeaways

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

Showing 121-150 of 255 questions

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Digestion and absorption practice · Mixed difficulty

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