General
✓✗Which one of the following does not exhibit the phenomenon of mutarotation?
- (−)-Fructose
- (+)-Lactose
- (+)-Sucrose
- (+)-Maltose
General
✓✗Which one regulates the rate of energy-producing (metabolic) reactions in the body?
- Progesterone
- Oestrogen
- Thyroxine
- Adrenaline
General
✓✗Which of the following hormones is a polypeptide?
- Estradiol
- Testosterone
- Progesterone
- Insulin
General
✓✗Amino acids are generally
- volatile liquids
- insoluble in water
- coloured gases
- colourless crystalline solids with high melting points
General
✓✗Proteins in which polypeptide chains run parallel and are held by hydrogen and disulphide bonds, forming fibre-like structures, are called
- conjugated proteins
- globular proteins
- fibrous proteins
- enzymes only
General
✓✗Which statement is incorrect about the peptide bond, −CO−NH−?
- The C−N bond has partial double-bond character
- The C−N bond length in proteins is longer than the usual C−N single bond length
- The C−N bond length in proteins is smaller than the usual C−N single bond length
- Spectroscopic analysis shows the −CO−NH− group is planar
General
✓✗Glucose reacts with hydroxylamine to form an oxime. This shows the presence of
- an amino group
- a carboxyl group
- a carbonyl group
- an OH group
General
✓✗Statement I: Keratin is a fibrous protein.
Statement II: Albumin is a globular protein.
Statement II: Albumin is a globular protein.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗Assertion: Insulin is a hormone.
Reason: Insulin is a polysaccharide.
Reason: Insulin is a polysaccharide.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗Which of the following hormones contains iodine?
- Adrenaline
- Testosterone
- Thyroxine
- Insulin
General
✓✗The amino acid that contains a thiol (SH) group is
- glycine
- lysine
- alanine
- cysteine
General
✓✗Which statement about cellulose is correct?
- It is digested by human enzymes
- It is branched like amylopectin
- It is made of α-D-glucose
- It is a linear polymer of β-D-glucose joined by C1−C4 glycosidic links
General
✓✗Assertion: Thymine is present in DNA.
Reason: Thymine is a purine base.
Reason: Thymine is a purine base.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗Carbohydrates that give two to ten monosaccharide units on hydrolysis are called
- monosaccharides
- glycosides only
- polysaccharides
- oligosaccharides
General
✓✗Which is the correct statement?
- Starch is a polymer of α-glucose
- Proteins are composed of only one type of amino acid
- In the cyclic (furanose) structure of fructose, the ring contains five carbon atoms and one oxygen atom
- Amylose is a component of cellulose