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Biochemistry (GATE)

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Which of the following bile acids are found in mice?

  1. Muricholic acids

  2. Chenodeoxycholic acids

  3. Deoxycholic acids

  4. Ursodeoxycholic acids

  5. None of these


Correct Option: A
Explanation:

Muricholic acids are a group of bile acids found in mice.

L-tryptophan is used for the production of

  1. biotin

  2. niacin

  3. folic acid

  4. ascorbic acid

  5. None of these


Correct Option: B
Explanation:

Niacin is synthesised from tryptophan.

Serotonin is released from

  1. enterochromaffin cells

  2. kupffer cells

  3. clara cells

  4. paneth cells

  5. None of these


Correct Option: A
Explanation:

Enterochromaffin cells  release serotonin.

Vitamin-C was originally called

  1. L-hexuronic acid

  2. thiamine

  3. pantothenic acid

  4. folic acid

  5. None of these


Correct Option: A
Explanation:

It was originally called L-hexuronic acid.

Humans contain ___________ as bile acids.

  1. deoxycholic acid and lithocholic acid

  2. cholic acid and chenodeoxycholic acid

  3. ursodeoxycholic acid and muricholic acid

  4. muricholic acid and cholic acid

  5. None of these


Correct Option: A
Explanation:

Deoxycholic acid is a bile acid. Bacteria metabolise chenodeoxycholic acid into secondary bile acid lithocholic acid.

Blood is drained form gallbladder by

  1. cystic vein

  2. vitelline veins

  3. hepatic veins

  4. umbilical vein

  5. None of these


Correct Option: A
Explanation:

The cystic vein drains blood from gallbladder.

What is the main function of hepatic veins?

  1. To drain de-oxygenated blood from liver

  2. To drain blood from gallbladder

  3. To conduct the blood from gastrointestinal track and spleen to liver

  4. To drain blood from yolk sac

  5. None of these


Correct Option: A
Explanation:

Hepatic veins are the blood vessels that drain de-oxygenated blood from the liver.

The internal iliac artery supplies to

  1. chest wall and breast

  2. bladder

  3. pelvis

  4. inner ear

  5. Both (1) and (2)


Correct Option: C
Explanation:

The internal iliac artery supplies to the walls and viscera of the pelvis, the buttock, the reproductive organs and the medial compartment of the thigh.

The anterior fontanelle is called

  1. bregma

  2. inion

  3. asterion

  4. stephanion

  5. None of these


Correct Option: A
Explanation:

The bregma is known as anterior fontanelle during infancy.

Photochemical reactions are found in

  1. ergocalciferol

  2. biotin

  3. niacin

  4. thiamine

  5. None of these


Correct Option: A
Explanation:

Ergocalciferol is a secosteroid formed by a photochemical bond breaking.

Tricuspid valve is related with

  1. preventing the regurgitation of blood into the sinus during the contraction of the atrium

  2. allowing blood to flow in only one direction through the heart

  3. preventing back flow of blood into the right atrium

  4. returning de-oxygenated blood from the body into the heart

  5. None of these


Correct Option: C
Explanation:

 The function of this valve is to prevent the back flow of blood into the right atrium.

Ergosterol exposed to UV radiation produces vitamin

  1. B2

  2. D2

  3. D3

  4. D5

  5. None of these


Correct Option: B
Explanation:

 Ergosterol is a provitamin form of vitamin D2 which on exposure to ultraviolet (UV) light causes a chemical reaction that produces vitamin D2.

_______ drains blood from the pelvis and lower limbs.

  1. Basilic vein

  2. Lienal vein

  3. Superior mesenteric vein

  4. Common iliac vein

  5. None of these


Correct Option: D
Explanation:

The common iliac vein drains blood from the pelvis and lower limbs.

Which of the following acts as muscle-stimulating protein?

  1. Leucine

  2. Proline

  3. Arginine

  4. Astacin

  5. None of these


Correct Option: A
Explanation:

Leucine is the only dietary amino acid that has the capacity to stimulate muscle protein synthesis.

Selectins are mostly bound up with

  1. cytokines

  2. thrombin

  3. histamine

  4. sugar moieties

  5. Both (1) and (2)


Correct Option: D
Explanation:

Selectins bind to sugar moieties and are considered to be a type of lectin.

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