Ciliary cells on alimentary wall

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NEET • BIOLOGY • DIGESTION AND ABSORPTION

Digestion and absorption practice · Mixed difficulty

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181 Hard

181 of 255

Analyzing +4 | -1

Consider the following statement regarding digestion and absorption in mammals. Identify wheather they are true or false and select the correct option accordingly I. Both Kupffer’s cells and glisson’s capsule are the characteristic of mammalian liver II. In dentition, thecodont means that teeth are embedded in the socket of jaw bones III. There are three pair of salivary glands in human beings, out of them parotid, situated beneath the tongue are the smallest salivary gland IV. Zymogen (inactive form of enzymes) are not the secretions of peptic cells

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Correct option: C

I and II are true while III and IV are false

Option C is correct because statements I and II are true, while statements III and IV are false. Statement III incorrectly states the location and size of the parotid gland, and statement IV incorrectly suggests zymogens are not secreted by peptic cells.

182 Medium

182 of 255

Remembering +4 | -1

In human beings, digestion of proteins, fats and carbohydrates starts from which of the following parts of the alimentary canal?

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Correct option: A

Stomach, intestine and mouth, respectively

Option A (Stomach, intestine and mouth, respectively) is correct because protein digestion starts in the stomach, fat digestion starts in the small intestine, and carbohydrate digestion starts in the mouth.

183 Easy

183 of 255

Remembering +4 | -1

Bile salts help in

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Correct option: A

Emulsification

Option A (Emulsification) is correct because bile salts aid in the emulsification of fats, breaking them into smaller droplets for easier digestion.

184 Easy

184 of 255

Understanding +4 | -1

Emulsification of fat will not occur in absence of

View answer and explanation

Correct option: C

Bile salts

Option C (Bile salts) is correct because bile salts are essential for emulsifying fats, breaking them into smaller droplets to increase the surface area for lipase to act upon.

185 Medium

185 of 255

Analyzing +4 | -1

Select the odd one from the following and select the correct option.

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Correct option: A

Ptyalin

Option D (Sucrose) is correct because Ptyalin, Maltase, and Lactase are digestive enzymes, while Sucrose is a disaccharide.

186 Medium

186 of 255

Analyzing +4 | -1

Assertion: Minerals are not biologically active
substances.

Reason: Some individuals suffer from anaemia
due to deficiency of copper.

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Correct option: D

If both Assertion and Reason are false

Option D (If both Assertion and Reason are false) is correct because minerals are biologically active (e.g., enzyme cofactors), and copper deficiency can cause anemia.

187 Medium

187 of 255

Understanding +4 | -1

Assertion: Proteins are commonly called body building biomolecules.

Reason: Proteins act as enzymes which regulate the meltabolism.

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Correct option: D

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion

Option D is correct because both the assertion and reason are true, and the reason correctly explains why proteins are called body-building biomolecules due to their role in metabolism and growth.

188 Hard

188 of 255

Understanding +4 | -1

Assertion: Human dentition is referred to as diphyodont.

Reason: Permanent set has teeth of four different types.

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Correct option: A

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

Option A is correct because human dentition is diphyodont (two sets of teeth), and the permanent set has four different types, but the reason doesn't explain why it's diphyodont.

189 Medium

189 of 255

Application +4 | -1

Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?

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Correct option: D

Salivary amylase

\to

Pancreatic amylase

\to

Disaccharidases

Option D (Salivary amylase → Pancreatic amylase → Disaccharidases) is correct because this is the correct sequence of enzyme action on carbohydrates as food moves through the alimentary canal.

190 Easy

190 of 255

Remembering +4 | -1

Which of the following animal exhibits diphyodont dentition?

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Correct option: C

Horse

Option C (Horse) is correct because horses exhibit diphyodont dentition, meaning they have two sets of teeth in their lifetime (deciduous and permanent).

191 Hard

191 of 255

Remembering +4 | -1

Proportion of which of the following should be increased in diet to improve strength and growth of bones?

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Correct option: C

Vitamin-D,

\mathrm{C}{\mathrm{a}^{2 + }}

and vitamin-A

Option A is correct because Vitamin D, Calcium, and Vitamin K are essential for bone health, promoting bone density and strength.

192 Medium

192 of 255

Remembering +4 | -1

The richest sources of vitamin-

{B_{12}}

are

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Correct option: A

Goat’s liver and spirulina

Option A (Goat’s liver and spirulina) is correct because goat's liver and spirulina are known to be exceptionally rich sources of vitamin B12.

193 Hard

193 of 255

Remembering +4 | -1

Peyer's patches are present in

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Correct option: A

ileum

Option A (ileum) is correct because Peyer's patches, which are lymphoid nodules, are predominantly found in the ileum of the small intestine.

194 Medium

194 of 255

Remembering +4 | -1

Diastema refers to

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Correct option: A

Gap between the teeth

Option A (Gap between the teeth) is correct because diastema refers to a space or gap between two teeth, most commonly between the upper front incisors.

195 Medium

195 of 255

Understanding +4 | -1

Which combination is responsible to increase the cholesterol level of the blood?

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Correct option: C

Both saturated and unsaturated fats

Option C is correct because both saturated and unsaturated fats can contribute to increased cholesterol levels in the blood, although saturated fats generally have a more significant impact.

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196 Medium

196 of 255

Remembering +4 | -1

Which of the following is not a source of Vitamin-A?

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Correct option: D

Yeast

Option D (Yeast) is correct because yeast is a good source of B vitamins but not Vitamin A, while carrots, mangoes, and apples contain Vitamin A or its precursors.

197 Medium

197 of 255

Remembering +4 | -1

Characteristic of mammalian liver is

View answer and explanation

Correct option: C

Glisson’s capsules and Kupffer’s cells

Option C (Glisson’s capsules and Kupffer’s cells) is correct because Glisson's capsule is a connective tissue layer surrounding the liver, and Kupffer's cells are specialized macrophages within the liver.

198 Hard

198 of 255

Analyzing +4 | -1

Read the following statements thoroughly and identify wheather they are true and false. Choose the right option accordingly
I. Bile is produced and stored in the liver and gall bladder, respectively
II. Common bile duct is the fusion of all the right and left hepatic ducts
III. Hepato-pancreatic duct opens into the proximal part of the small intestine
IV. Pancreas consists of two parts, exocrine and endocrine, which secretes insulin and glucagon hormone and pancreatic juices containing enzymes, respectively
V. Pepsinogen, a secretion of chief cells is activated by hydrochloric acid
VI. Peptides are converted into dipeptides with the action of carboxypeptidase

View answer and explanation

Correct option: D

Statement I, III, V and VI are true while III and IV are false

Option C (Statement I, III, IV and V are true while II and VI are false) is correct because statements II and VI contain inaccuracies regarding bile duct formation and peptide digestion, respectively.

199 Medium

199 of 255

Remembering +4 | -1

Bacteria E,coli are found in which part of the alimentary canal?

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Correct option: C

Colon

Option C (Colon) is correct because E. coli is a common bacterium found in the colon of the large intestine.

200 Medium

200 of 255

Analyzing +4 | -1

Odd one w.r.t. pancreatic juice is

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Correct option: C

Enterokinase

Option C (Enterokinase) is the odd one out because it is not a component of pancreatic juice itself, but rather an enzyme that activates trypsinogen, which is secreted by the pancreas.

201 Medium

201 of 255

Understanding +4 | -1

Bile salts help in

View answer and explanation

Correct option: B

Digestion and absorption of fat

Option B (Digestion and absorption of fat) is correct because bile salts emulsify fats, aiding both digestion and subsequent absorption.

202 Medium

202 of 255

Remembering +4 | -1

Pancreatic secretion and gall bladder contraction are stimulated by

View answer and explanation

Correct option: D

Cholecystokinin

Option D (Cholecystokinin) is correct because cholecystokinin stimulates both pancreatic secretion and gall bladder contraction.

203 Hard

203 of 255

Understanding +4 | -1

Digestion of protein is completed in

View answer and explanation

Correct option: D

Both (b) and (c )

Option D (Both (b) and (c )) is correct because protein digestion is completed in the duodenum and ileum of the small intestine.

204 Hard

204 of 255

Remembering +4 | -1

Deficiency of cyanocobalamine causes

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Correct option: A

Pernicious anaemia

Option A (Pernicious anaemia) is correct because cyanocobalamin (Vitamin B12) deficiency leads to impaired DNA synthesis, particularly in rapidly dividing cells like those in the bone marrow, resulting in pernicious anemia.

205 Hard

205 of 255

Understanding +4 | -1

What do you mean by the absorption of food?

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Correct option: A

It is a process by which the end products of the digestion passes through the intestinal mucosa into blood or lymph

Option A (It is a process by which the end products of the digestion passes through the intestinal mucosa into blood or lymph) is correct because it accurately defines the process of absorption.

206 Hard

206 of 255

Remembering +4 | -1

Which of the following statement is true?

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Correct option: D

Chymotrypsin can digest casein

Option D (Chymotrypsin can digest casein) is correct because chymotrypsin is a protease that can break down casein, a protein found in milk.

207 Medium

207 of 255

Understanding +4 | -1

Pepsin, trypsin & chymotrypsin are similar because they are

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Correct option: C

Specific endopeptidases acting upon peptide & polypeptide chains

Option C (Specific endopeptidases acting upon peptide & polypeptide chains) is correct because all three are endopeptidases that break internal peptide bonds.

208 Hard

208 of 255

Understanding +4 | -1

The catilaginous structure/s, lined with mucous membrane is/are

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Correct option: D

Both 1 and 3

Option D (Both 1 and 3) is correct because both the larynx and trachea are cartilaginous structures lined with a mucous membrane.

209 Easy

209 of 255

Remembering +4 | -1

Medium, in which pepsin is active?

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Correct option: C

Acidic

Option C (Acidic) is correct because pepsin, a protease, functions optimally in the acidic environment of the stomach.

210 Medium

210 of 255

Understanding +4 | -1

The functions of gastrointestinal tract like, secretion and motility are controlled by 

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Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because both intrinsic and extrinsic neural systems control GI tract functions.

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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