Biomolecules

The helical structure of protein is stabilised by

1. dipeptide bonds
2. hydrogen bonds
3. ether bonds
4. peptide bonds

Which of the following structures represents the peptide chain?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called

1. maltase
2. lipase
3. zymase
4. pepsin

Glycolysis is

1. oxidation of glucose to glutamate
2. conversion of pyruvate to citrate
3. oxidation of glucose to pyruvate
4. conversion of glucose to haem

Phospholipids are esters of glycerol with

1. three carboxylic acid residues
2. two carboxylic acid residues and one phosphate group
3. one carboxylic acid residue and two phosphate groups
4. three phosphate groups

Chargaff's rule states that in an organism

1. amount of adenine (A) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (C)
2. amount of adenine (A) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (C)
3. amount of adenine (A) is equal to that of cytosine (C) and the amount of thymine (T) is equal to that of guanine (G)
4. amounts of all bases are equal

Enzymes are made up of

1. edible proteins
2. proteins with specific structure
3. nitrogen containing carbohydrates
4. carbohydrates

Which is not a true statement?

1. -carbon of -amino acid is asymmetric
2. All proteins are found in L-form
3. Human body can synthesise all proteins it needs
4. At pH = 7, both amino and carboxylic groups exist in ionised form

Cellulose is polymer of

1. glucose
2. fructose
3. ribose
4. sucrose

Which of the following give positive Fehling solution test?

1. Sucrose
2. Glucose
3. Fats
4. Protein