Tag: digestion and absorption

Questions Related to digestion and absorption

In Amoeba, absorption of the digested nutrients occurs in

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

  1. Contractile vacuole

  2. Plasma membrane

  3. Cytoplasm

  4. Pseudopodia

Show answer
Correct Option: C
Explanation:

The digested food present in the food vacuole of amoeba is absorbed directly into the cytoplasm of amoeba cell by diffusion. Since, amoeba consists of only one small cell, it does not require blood system to carry the digested food. The digested food just spreads out from the food vacuole into the whole of amoeba cell. After absorption of food, the food vacuole disappears.

Therefore, the correct answer is option C.

Which one of the following is wrong about the digestive system of a grasshopper?

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

  1. Wall of crop is muscular and its lumen is lined with cutile.

  2. A pair of small, branched salivary glands associated to anterior end of midgut.

  3. Heptatic caecae are six pairs of glands associated to anterior end of midgut.

  4. Malpighian tibules are the thread-like tibules with blunt tips associated to the function of midgut and hindgut.

Show answer
Correct Option: A
Explanation:

Grasshoppers have the typical insect body plan of head, thorax and abdomen.
 The thorax and abdomen are segmented and have a rigid cuticle made up of overlapping plates composed of chitin. Hence, Wall of a crop is muscular and its lumen is lined with cutile is wrong about the digestive system of a grasshopper.

So, the correct option is 'Wall of the crop is muscular and its lumen is lined with cutile.'.

Choose the correct answers from the alternatives given.
Which one of the following protozoans lives in the guts of termites and helps them digest cellulose?

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

  1. Leishmania

  2. Physarum

  3. Trichonymph

  4. Tetrahymena

Show answer
Correct Option: C
Explanation:

Termites depend on protozoans which digest the cellulose ingested from the dead wood. Protozoa will die outside the termite and termite unable to digest the food without protozoans, hence they were in a symbiotic relationship.

So, the correct option is 'Trichonymph'.

For the digestion of cellulose, an enzyme called cellulase is required. Some mammals lodge cellulase producing bacteria in their digestive system by offering them food and shelter. These mammals are mostly________

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

  1. Herbivores

  2. Carnivores

  3. Omnivores

  4. Sanguivores

Show answer
Correct Option: A
Explanation:
Herbivores are plant eating animals. Plants have cellulose that need an enzyme called cellulase for its digestion. Herbivores lodge have a microbial flora are obligate or facultative anaerobes that can decompose complex plant material, such as cellulose, hemicellulose, starch, and proteins. The hydrolysis of cellulose results in sugars, which are further fermented to acetate, lactate, propionate, butyrate, carbon dioxide, and methane.
So, the correct answer is 'Herbivores'.

Cholesterol is synthesised in

biology digestion and absorption liver functions of the liver secretory organs

  1. Brunners glands

  2. Liver

  3. Spleen

  4. Pancreas

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Correct Option: B

Cholesterol is synthesized in

biology digestion and absorption liver functions of the liver secretory organs

  1. Pancreas

  2. Brunner's gland

  3. Spleen

  4. Liver

Show answer
Correct Option: D
Explanation:

The liver performs several roles in lipid metabolism. Cholesterol, triglycerides (fats) and lipoproteins are synthesized in the liver.

Deamination occur in

biology digestion and absorption liver functions of the liver secretory organs

  1. Kidney

  2. Liver

  3. Nephron

  4. Both 1 and 2

Show answer
Correct Option: D
Explanation:

Deamination is the process of removal of amino acids like serine and threonine from molecules and the enzyme that catalyses the reaction is deaminases. In the human body, it takes place primarily in the liver however glutamate is also deaminated in the kidneys.

So, the correct answer is 'both 1 and 2'.

Peyer's patches are found in 

biology digestion and absorption liver functions of the liver secretory organs

  1. Liver

  2. small intestine

  3. Large intestine

  4. Spleen

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Correct Option: A

What is function of Kupffer's cell

biology digestion and absorption liver functions of the liver secretory organs

  1. Bile secretion

  2. Digestion of lipid

  3. Phagocytic

  4. Digestion of protiein

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Correct Option: C

Where are hormones destroyed in the human body?

biology digestion and absorption liver functions of the liver secretory organs

  1. Liver

  2. Kidney

  3. Stomach

  4. Small intestine

Show answer
Correct Option: A
Explanation:
  • Hormones are secreted by the endocrine glands which are specific in nature.
  • Each hormone causes a response in a target organ or tissues.
  • Once the function of the hormones is completed on their target organs or tissues they are destroyed. 
  • They are destroyed by the liver or the tissues of the target organs. 
  • The destroyed hormone is removed by the kidney. 
  • So, the correct answer is 'Liver'.