Tag: digestion and absorption

Questions Related to digestion and absorption

Digestion of food
Which of the following match is correct?

biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

  1. Renin Protein.

  2. Trypsin - Starch

  3. Invertase Sucrose

  4. Amylase Lactose

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Correct Option: C
Explanation:

The correct answer is (c).

Which reserve a starving man first consumed?

biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

  1. Fat

  2. Protein

  3. Glycogen

  4. Vitamin

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Correct Option: C
Explanation:

Starvation mode is a state in which the body is responding to prolonged periods of low energy intake levels. The body responds to reduced energy intake by burning fat reserves and consuming muscle and other tissues. Specifically, the body burns fat after first exhausting the contents of the digestive tract along with glycogen reserves stored in muscle and liver cells. After prolonged periods of starvation, the body will utilize the proteins within muscle tissue as a fuel source.

The digestion of cellulose in rabbit and other herbivorous mammals takes place in

biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

  1. Vermiform appendix

  2. Colon

  3. Caecum

  4. Ileum

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Correct Option: C
Explanation:

Hindgut fermentation is a digestive process seen in monogastric herbivores, animals with a simple, single-chambered stomach. Cellulose is digested with the aid of symbiotic bacteria. The microbial fermentation occurs in the digestive organs that follow the small intestine: the large intestine and caecum.

Choose the wrong enzymatic reaction. 

biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

  1. Sucrose $\overset{Invertase}{\rightarrow}$ Glucose + Fructose

  2. Lactose $\overset{Lactase}{\rightarrow}$ Glucose + Fructose

  3. Pepsinogen $\overset{HCI}{\rightarrow}$ Pepsin

  4. Maltose $\overset{Maltase}{\rightarrow}$ Glucose + Glucose

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Correct Option: B
Explanation:

The correct answer is (b).

Sucrase is an enzyme found in:-

biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

  1. saliva

  2. gastric juice

  3. intestinal juice

  4. pancreatic juice

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Correct Option: C
Explanation:

Sucrase enzymes are located on the brush border of the small intestine. The enzymes catalyze the hydrolysis of sucrose to fructose and glucose. The sucrase enzyme invertase, which occurs more commonly in plants, also hydrolyzes sucrose but by a different mechanism

So, the correct option is 'Intestinal juice'

Which of the following statement is incorrect related to digestion?

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules.

  2. It is a anabolic process.

  3. Digestion is both voluntary and involuntary process.

  4. None of these.

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Correct Option: B
Explanation:

A) Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules.

B) It is a catabolic process as it breaks down the molecule into a simple form.
C) It is voluntary until swallowing as food is swallowed the whole process becomes involuntary.

So the correct option is '(B) It is an anabolic process.
                                         

The final products of digestion should be

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Fat soluble and should be able to pass through cell walls.

  2. Water soluble and should be able to pass through cell walls.

  3. Fat soluble and should be able to pass through cell membranes.

  4. Water soluble and should be able to pass through cell membranes.

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Correct Option: D
Explanation:
  •  Digestion is catabolic process in the digestive tract where ingested food is converted into simpler, soluble and diffusible substances that can be assimilated by the body and absorbed into the blood from the intestinal walls.
  • The end product should be water soluble as it has to combine with the plasma of blood.
  • Absorption at intestinal walls is through cell membranes of intestinal cells and walls of blood capillaries.
  • So, the correct answer is 'Water soluble and should be able to pass through cell membranes'.

Which scientist first extracted rennin from a calf stomach helping to make cheese more easily?

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Karl August Folkers

  2. Christian Hansen

  3. Richard Kuhn

  4. George Wald

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Correct Option: B
Explanation:
Rennet is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its key component, is a protease enzyme that curdles the casein in milk. This .Helps young mammals digest their mothers' milk. Rennet can also be used to separate milk into solid curds for cheese making. Calf rennet is extracted from the inner mucosa of the fourth stomach chamber . First extracted by 'Christian Hansen'. So, the correct option is "B" (Christian Hansen).

In amoeba, the digestion is intracellular because

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Amoeba is unicellular

  2. Amoeba is multicellular

  3. Amoeba is found in a pond

  4. Amoeba is a microscopic animal

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Correct Option: A
Explanation:

Amoeba, a protozoan employs intracellular digestion for deriving nutrition. Food is ingested with the pseudopodium by invagination of cell membrane and subsequently stored into the food/gastric vacuole. This due to cytoplasmic movements combine with the lysosome where the food is broken down to simpler products and assimilated. Finally, the waste is removed by exocytosis by the contractile vacuole.

Digestion is a .......... process

biology digestion and absorption minerals and vitamins nutrition and diet role of various nutrients

  1. Mechanical

  2. Chemical

  3. Both A and B

  4. None of the above

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Correct Option: C
Explanation:

Digestion is the combination of mechanical as it food convert into a paste by teeth through a process called as mastication and chemical process as it requires various enzymes that break down the complex food material into simpler absorbable form.

So, the correct option is 'Both A and B'