Digestion and Absorption Test

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Digestion and Absorption Test - 59

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Question 1
1 / -0

Enzymes of salivary glands, stomach and small intestine works at pH ___, ___ and ___ respectively.

A
6.8, 2, 8

B
8, 2, 6.8

C
2, 8, 6.8

D
6.8, 8, 2

Solution

A. 6.8, 2, 8
Solution: Optimal pH for the activity of the enzymes of salivary glands (e.g. ptylin) is around 7. Optimal pH for the activity of the enzymes of stomach (e.g. pepsin) is 1.5-2 . Optimal pH for the activity of the enzymes of small intestine (e.g. trypsin) is around 8.
So the correct answer is "6.8, 2, 8"
Question 2
1 / -0

The '$$C$$' shaped structure of alimentary canal is

A
Stomach

B
Oesophagus

C
Duodenum

D
Vermiform appendix

Solution

An alimentary canal is also called as human digestive system. It is a muscular tube which start from the mouth up to the anus. The various parts of the alimentary canal includes mouth, teeth, esophagus, pharynx, stomach, small intestine, large intestine and anus. Small intestine consists of three regions, duodenum, middle portion jejunum and ileum. Duodenum is a C shaped structure. Jejunum is a long coiled structure. Ileum is highly coiled structure.
Thus, the correct answer is option C.
Question 3
1 / -0

Which of the following is incorrect?

A
Sucrose is converted into glucose and fructose in the presence of sucrase

B
Maltose is converted into glucose and glucose in the presence of maltase

C
Lactose is converted into galactose and fructose in the presence of lactase

D
Nucleotides are converted into nucleosides and phosphate group in the presence of nucleotidases
Solution
Correct Answer: C
Explanation:
The intestine juice contains enzymes for the digestion of carbohydrates, they are sucrase, maltase, lactase, etc.
Sucrase help in the breakdown of sucrose into glucose and fructose.
In the presence of maltase, Maltose is breakdown into 2 glucose units.
Lactase converts lactose into simple sugar forms called glucose and galactose.
Hence, the correct answer is Lactose is converted into galactose and fructose in the presence of lactase.
Question 4
1 / -0

Consider the following two statements A & B and select the correct ones.
A. Small intestine is shorter than large intestine.
B. Small intestine is wider than large intestine.

A
Both the statements are correct.

B
Both the statements are wrong.

C
Statement A is correct, B is wrong.

D
Statement B is correct, A is wrong.

Solution

B. Both the statements are wrong
Solution: Small intestine is many times longer than large intestine. But it is called 'small' as its diameter is small and the large intestine is called 'large' as its diameter is more than small intestine.
So the correct answer is "Both the statements are wrong"
Question 5
1 / -0

A digestive enzyme, named amylase, in the saliva begins digestion of -

A
carbohydrates

B
fats

C
proteins

D
nucleic acids

Solution

Saliva contains the digestive enzyme, amylase, which works on carbohydrate starches like bread to help break them down into simple sugars. Some digestion of fat also starts in the mouth when a small amount of lingual lipase is secreted and mixes with saliva
So, the correct answer is 'Carbohydrates'
Question 6
1 / -0

Choose the correct answers from the alternatives given.
The villi present on the wall of the small intestine

A
secrete digestive enzymes

B
increase the surface area for absorption

C
hold mucus, so ulcers do not form

D
hold products of digestion, so they do not enter the large intestine

Solution

The absorption of digested carbohydrates, proteins and fats is done in the small intestine with the help of villi which helps increase the surface area of the intestine. Villi are finger like projections on the intestinal wall that absorbs digested food material. Carbohydrates and proteins are absorbed into blood, while fats are absorbed into the lymph
So, the correct answer is 'increase the surface area for absorption'
Question 7
1 / -0

Choose the correct answer from the allternatives given.
What is the name of the portion of alimentary canal which crushes the food ?

A
Crop

B
Gizzard

C
Oesophagus

D
Stomach

Solution

Answer B: Gizzard
Stomach constructed of thick muscular walls is used for grinding up food, often aided by particles of stone or grit. In certain insects, the gizzard features chitinous plates or teeth.
Question 8
1 / -0

Which of the following organs absorbs food nutrients through villi?

A
Small intestine

B
Oesophagus

C
Rectum

D
Stomach

Solution

The absorption is done in the small intestine with the help of villi which helps increase the surface area of the intestine, so as to store more digested food.
So, the correct option is 'small intestine'.
Question 9
1 / -0

The sigmoid colon is a part of :-

A
large intestine

B
small intestine

C
pharynx

D
rectum
Solution
- The sigmoid colon is the part of the large intestine that is closest to the rectum and anus
- It forms a loop that averages about 35-40 cm in length
- The loop is typically shaped like a Greek letter sigma or Latin letter S
So, the correct answer is 'Large intestine'
Question 10
1 / -0

The largest salivary gland present in human is

A
Submandibular gland

B
Sublingual gland

C
Parotid gland

D
Gastric gland
Solution
In human, there are three salivary glands:
The two parotid gland is near the ear. The largest salivary glands.
The sublingual gland is under the Tongue.
The submandibular gland is in the shape of a "U". It is under the chin bone.
So, the correct answer is Parotid gland.

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Re-Attempt Weekly Quiz Competition

Digestion and Absorption Test - 59

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Digestion and Absorption Test - 59

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Question 1

6.8, 2, 8

8, 2, 6.8

2, 8, 6.8

6.8, 8, 2

Solution

Question 2

Stomach

Oesophagus

Duodenum

Vermiform appendix

Solution

Question 3

Sucrose is converted into glucose and fructose in the presence of sucrase

Maltose is converted into glucose and glucose in the presence of maltase

Lactose is converted into galactose and fructose in the presence of lactase

Nucleotides are converted into nucleosides and phosphate group in the presence of nucleotidases

Solution

Question 4

Both the statements are correct.

Both the statements are wrong.

Statement A is correct, B is wrong.

Statement B is correct, A is wrong.

Solution

Question 5

carbohydrates

fats

proteins

nucleic acids

Solution

Question 6

secrete digestive enzymes

increase the surface area for absorption

hold mucus, so ulcers do not form

hold products of digestion, so they do not enter the large intestine

Solution

Question 7

Crop

Gizzard

Oesophagus

Stomach

Solution

Question 8

Small intestine

Oesophagus

Rectum

Stomach

Solution

Question 9

large intestine

small intestine

pharynx

rectum

Solution

Question 10

Submandibular gland

Sublingual gland

Parotid gland

Gastric gland

Solution

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