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NEET • BIOLOGY • DIGESTION AND ABSORPTION

Digestion and absorption practice · Easy

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Showing 31-60 of 76 questions

31 Easy

31 of 76

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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.

32 Easy

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Wisdom teeth in human is

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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).

33 Easy

33 of 76

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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.

34 Easy

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Maximum absorption of water occurs in

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Correct option: A

Colon

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

35 Easy

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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.

36 Easy

36 of 76

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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.

37 Easy

37 of 76

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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.

38 Easy

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The stored food in animals is called

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Correct option: D

Glycogen

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

39 Easy

39 of 76

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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.

40 Easy

40 of 76

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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.

41 Easy

41 of 76

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

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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.

42 Easy

42 of 76

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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.

43 Easy

43 of 76

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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.

44 Easy

44 of 76

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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.

45 Easy

45 of 76

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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.

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46 Easy

46 of 76

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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.

47 Easy

47 of 76

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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.

48 Easy

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A healthy person eats the following diet - 5 gm raw sugar, 4 gm albumin, 10 gm pure buffalo ghee adultrated with 2 gm vegetable ghee (hydrogenated vegetable oil) and 5 gm lignin. How many calories he is likely to get?

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Correct option: A

144

Option A (144) is correct because the calculation involves multiplying the grams of each food type by its caloric value (sugar and albumin: 4 kcal/g, ghee: 9 kcal/g) and summing them up. Lignin is indigestible.

49 Easy

49 of 76

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Which one of the following is vestigial organ of human?

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Correct option: C

Wisdom teeth

Option C (Wisdom teeth) is correct because wisdom teeth are vestigial organs in humans, often serving no functional purpose.

50 Easy

50 of 76

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Secretion of pancreatic juice is stimulated by

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Correct option: B

Secretin

Option B (Secretin) is correct because secretin is the hormone primarily responsible for stimulating the secretion of pancreatic juice.

51 Easy

51 of 76

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The condition in which the food is not properly digested leading to a feeling of fullness is called

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Correct option: B

Indigestion

Option B (Indigestion) is correct because indigestion is a condition where food is not properly digested, leading to a feeling of fullness, discomfort, and other digestive symptoms.

52 Easy

52 of 76

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Digestion of starch starts from the mouth, whereas …A… is the site of digestion mainly for …B….. Choose the correct combination of options to complete the given statement

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Correct option: A

A-stomach; B-protein

Option A is correct because starch digestion begins in the mouth, and protein digestion primarily occurs in the stomach.

53 Easy

53 of 76

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The Digestive enzyme that is not found in human pancreatic juice is

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Correct option: A

Nucleotidase

Option A (Nucleotidase) is correct because nucleotidase is an enzyme found in intestinal juice, not pancreatic juice. The other options are all pancreatic enzymes.

54 Easy

54 of 76

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Complete the equation

\mathrm{Nucleic\;acids\;}\mathrm{\;Nucleotides\;} \to \ldots \ldots \ldots .

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Correct option: D

Nucleosides

Option D (Nucleosides) is correct because nucleic acids are broken down into nucleotides, which are further broken down into nucleosides and phosphate.

55 Easy

55 of 76

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What is the process of food passage from buccal cavity to the site of water and mineral absorption

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Correct option: B

Mouth → Buccal cavity → Pharynx → Oesophagus → Stomach → Duodenum → lleum → Caecum → Rectun

Option B is correct because it accurately represents the sequential passage of food from the mouth to the rectum, including key digestive organs.

56 Easy

56 of 76

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Hormonal control of the secretion of digestive juices is carried out by the local hormones produced by the _____ and _____

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Correct option: D

a – gastric b – intestinal

Option D (a – gastric b – intestinal) is correct because local hormones controlling digestive juice secretion are produced by the gastric and intestinal mucosa.

57 Easy

57 of 76

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Riboflavin is

View answer and explanation

Correct option: B

Vitamin-

{B_2}

The correct answer is B (Vitamin-

{B_2}

) because riboflavin is the chemical name for Vitamin B2.

58 Easy

58 of 76

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What do you mean by dental formula?

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Correct option: B

An arrangement of teeth in each half of the upper and lower jaw in the order of I, C, PM, M

Option B (An arrangement of teeth in each half of the upper and lower jaw in the order of I, C, PM, M) is correct because the dental formula represents the number and arrangement of teeth in each half of both jaws.

59 Easy

59 of 76

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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.

60 Easy

60 of 76

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Emulsification of fat will not occur in absence of

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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.

Revision notes and key takeaways

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