Carbohydrates and lipids — practice questions

Question 1 · difficulty L3 · understanding

Read the following statements on lipids and find out correct set of statements : (a) Lecithin found in the plasma membrane is a glycolipid (b) Saturated fatty acids possess one or more c = c bonds (c) Gingely oil has lower melting point, hence remains as oil in winter (d) Lipids are generally insoluble in water but soluble in some organic solvents (e) When fatty acid is esterified with glycerol, monoglycerides are formed Choose the correct answer from the option given below:

• A. (a), (b) and (c) only
• B. (a), (d) and (e) only
• C. (c), (d) and (e) only
• D. (a), (b) and (d) only

Question 2 · difficulty L3 · understanding

A dehydration reaction links two glucose molecules to product maltose. If the formula for glucose is C 6 H 12 O 6 then what is the formula for maltose?

• A. C 12 H 20 O 10
• B. C 12 H 24 O 12
• C. C 12 H 22 O 11
• D. C 12 H 24 O 11

Question 3 · difficulty L3 · understanding

Following are the statements with reference to 'lipids'. (1) Lipids having only single bonds are called unsaturated fatty acids (2) Lecithin is a phospholipid. (3) Trihydroxy propane is glycerol (4) Palmitic acid has 20 carbon atoms including carboxyl carbon. (5) Arachidonic acid has 16 carbon atoms. Choose the correct answer from the options given below.

• A. (2) and (5) only
• B. (1) and (2) only
• C. (3) and (4) only
• D. (2) and (3) only

Question 4 · difficulty L3 · understanding

Inulin is a polymer of :

• A. Fructose
• B. Galactose
• C. Amino acids
• D. Glucose

Question 5 · difficulty L3 · understanding

Cellulose does not form blue colour with Iodine because

• A. It is a helical molecule
• B. It does not contain complex helices and hence cannot hold iodine molecules
• C. It breaks down when iodine reacts with it
• D. It is a disaccharide

Question 6 · difficulty L3 · understanding

Match List-I with List-II: List - I (Biological Molecules) List - II (Biological functions) (a) Glycogen (i) Hormone (b) Globulin (ii) Biocatalyst (c) Steroids (iii) Antibody (d) Thrombin (iv) Storage product Choose the correct answer from the options given below:

• A. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
• B. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
• C. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
• D. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Question 7 · difficulty L3 · understanding

Identify the substances having glycosidic bond and peptide bond, respectively in their structure

• A. Glycerol, trypsin
• B. Cellulose, lecithin
• C. Inulin, insulin
• D. Chitin, cholesterol