Tag: digestion and absorption

Questions Related to digestion and absorption

Cartilage matrix is digested during its osteogenesis through

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

  1. Intracellular autophagic activity

  2. Extracellular lysosomal activity

  3. Intracellular heterophagic activity

  4. Both B and C.

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Correct Option: B

Assertion  :  Trypsin helps in blood digestion of predator animals.

Reason  :    Trypsin hydrolyzes fibrinogen


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

  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is

    not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: A
Explanation:

Trypsin is protein digesting enzyme present in the intestine of animals. Though it cannot digest casein (a milk protein), in predator animals drinking the blood of their prey, trypsin hydrolyzes fibrinogen of blood into fibrin, leading to blood coagulation thus help in blood digestion. It also activates other pancreatic proteases.

Essentially the word digestion means

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

  1. Burning of food

  2. Oxidation of food

  3. Hydrolysis of food

  4. Breakdown of food

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Correct Option: D
Explanation:

Digestion is the breakdown of food into smaller components that can be more easily absorbed and assimilated by the body. These smaller substances are absorbed through the small intestine into the blood stream.

In humans, digestion is

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  1. Intercellular

  2. Intracellular

  3. Extracellular

  4. Both A and B

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Correct Option: C

Intracellular digestion occurs in human body for

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

  1. Lipids

  2. Proteins

  3. Sucrose

  4. All of the above

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Correct Option: D
Explanation:
  • The starch, proteins and fats in food get digested by digestive enzymes and get converted into simpler components and this type of digestion is called extracellular digestion.
  • The starches and some glycogen in food get hydrolysed inside the mouth while the food is swallowed by ptyalin or salivary amylase enzyme in the saliva.
  • So, the correct answer is 'All of the above'.

In which of the following organisms, extracellular as well as intracellular digestion occurs?

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

  1. Paramecium

  2. Planaria

  3. Earthworm

  4. All the given options

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Correct Option: B
Explanation:

In Planaria, digestion involves both the modes, ie, extracellular as well as intracellular. Fats are normally digested extracellularly, while other food components are digested intracellularly.
The intracellular digestion is done by amoeboid cells lining the intestine. Digested food diffuses to the surrounding mesenchyme. 

Thus the correct answer is option B.

Both intracellular and extracellular digestion occur in

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

  1. Planaria / Hydra

  2. Earthworm

  3. Paramecium

  4. All the above

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Correct Option: A

In Cnidarians, digestion occurs in the gastro-vascular cavity and then inside endodermal cells. In sponges, digestion takes place in

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  1. Paragastric cavity and choanocytes

  2. Spongocoel and Food vacuoles

  3. Choanocytes and Amoebocytes

  4. Spongocoel and Amoebocytes

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Correct Option: A
Explanation:

The digestion in sponges is intracellular. It takes place in coenocytic oral cells. The movement of water initiated by the coenocyteS. It helps in the digestion and respiratory system of sponges because along with the water they also transport oxygen. They then push out carbon dioxide which is a waste material out of the sponge body.

Choanocytes make up the third layer in sponges. The first layer gives sponges pores and the second layer gives the shape. The mobile layer which is also known as amebocyte work in concent with choanocytes to feed sponges.
So, the correct option is 'Paragastric cavity and choanocytes'

Which of the following statements about digestion is correct ?

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

  1. Digestion releases energy from food

  2. Digestion converts insoluble molecules into soluble molecules

  3. Digestion changes proteins into amino acids

  4. All of the above

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Correct Option: A

In a general sense, digestion is simply hydrolysis of complex polymers to monomers.

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  1. True

  2. False

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Correct Option: A
Explanation:

  • Food is one of the basic requirements of all living organisms. 
  • The major components of our food are carbohydrates, proteins and fats. Vitamins and minerals are also required in small quantities.  
  • Biomacromolecules in food cannot be utilised by our body in their original form. They have to be broken down and converted into simple substances in the digestive system. 
  • This process of conversion of complex food substances to simple absorbable forms is called digestion and is carried out by our digestive system by mechanical and biochemical methods. Hence, In a general sense, digestion is simply hydrolysis of complex polymers to monomers.
So, the correct answer is 'true'.