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CSIR lifescience

CSIR lifescience

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Questions

Question 1 Multiple Choice (Single Answer)

Monosaccharide which does not have an asymmetric carbon atom is:

  1. glyceraldehyde
  2. erythrose
  3. xylose
  4. glucose
  5. dihydroxyacetone
Question 2 Multiple Choice (Single Answer)

Which of the following are a pair of epimers?

  1. Glucose and fructose
  2. Glucose and mannose
  3. Sorbose and fructose
  4. Allose and mannose
  5. Fructose and galactose
Question 3 Multiple Choice (Single Answer)

Lactose and sucrose are disaccharides. Which of the following statements is/are true about lactose and sucrose?

  1. Lactose is made up of galactose and glucose, and sucrose is made up of glucose and fructose.
  2. Lactose and sucrose are reducing disaccharides.
  3. Lactose is a reducing disaccharide but sucrose is not .
  4. Options (1) and (2) are true.
  5. Options (1) and (3 ) are true.
Question 4 Multiple Choice (Single Answer)

Glycosaminoglycan hyaluronic acid contains:

  1. glucuronic acid and N- acetylglucosamine
  2. amylose and amylopectin
  3. α1-4 linked glucose
  4. n-acetyl-D-glucosamine
  5. glucose in β1-4 glycosidic linkages
Question 5 Multiple Choice (Single Answer)

Why glucose molecules are not stored in monomeric form?

  1. Glucose changes the pH of cytoplasmic fluid.
  2. Glucose cannot be dissolved in cytoplasmic fluid.
  3. Glucose molecule increases the osmolarity of the cell.
  4. Glucose molecule decreases the osmolarity of the cell.
  5. Glucose molecules degrade rapidly.
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