Tag: secretory organs

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Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Cell organelle showing xenobiotics with the help of cytochrome $P450$ is also involved in

  1. Glycosylation process

  2. Glycolate oxidation or metabolism

  3. Glycogen metabolism

  4. Glyoxylate metabolism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Cytochrome P450 is an enzyme found in cell organelles such as mitochondria and is involved in the metabolism of xenobiotics. Glyoxalate cycle involves the production of glucose from fatty acids and a part of the cycle also occurs in the mitochondria. Therefore, the cell organelle involved in xenobiotic metabolism with the help of cytochrome P450 is also involved in glyoxalate metabolism. 
So, the correct option is 'Glyoxalate metabolism'.
Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Glycogenesis refers to

  1. Conversion of glycogen to glucose.

  2. Breakdown of glucose to form pyruvate.

  3. Breakdown of pyruvate to form glucose.

  4. Conversion of glucose to glycogen.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glycogenesis is the process of glycogen synthesis, in which glucose molecules are added to chains of glycogen for storage. This process is activated during rest periods following the Cori cycle, in the liver, and also activated by insulin in response to high glucose levels. Mostly glycogenesis occurs in the liver.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out is quite yellowish. The yellow colour of stool is due to

  1. bile pigments passed through bile juice

  2. undigested milk protein casein

  3. pancreatic juice poured into duodenum

  4. intestinal juice.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The yellow colour of the stools is due to the presence of bile pigments. Bile pigments are the excretory products. Bile is a bitter-tasting greenish-yellow alkaline fluid produced by the liver and stored in the gall bladder and secreted into the duodenum. It assists the digestion and absorption of fats by the action of bile salts, which chemically reduce fatty substances and decrease the surface tension of fat droplets so that they are broken down and emulsified. So, the correct answer is (a).