BIOMOLECULES

Glycogen is a branched-chain polymer of α-D-glucose units in which the chain is formed by C1—C4 glycosidic linkage, whereas branching occurs by the formation of C1-C6 glycosidic linkage. The structure of glycogen is similar to __________.

• Amylose

• Amylopectin

• Cellulose

• Glucose

Which of the following polymer is stored in the liver of animals?

• Amylose

• Cellulose

• Amylopectin

• Glycogen

Sucrose (cane sugar) is a disaccharide. One molecule of sucrose on hydrolysis gives _________.

• 2 molecules of glucose

• 2 molecules of glucose + 1 molecule of fructose

• 1 molecule of glucose + 1 molecule of fructose

• 2 molecules of fructose

Which of the following pairs represents anomers?

Proteins are found to have two different types of secondary structures viz. α-helix and β-pleated sheet structure. α-helix structure of the protein is stabilized by :

• Peptide bonds

• van der Waals forces

• Hydrogen bonds

• Dipole-dipole interactions

In disaccharides, if the reducing groups of monosaccharides, i.e. aldehydic or ketonic groups, are bonded, these are non-reducing sugars. Which of the following disaccharide is a non-reducing sugar.

Which of the following acids is a vitamin?

• Aspartic acid

• Ascorbic acid

• Adipic acid

• Saccharic acid

Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are Are these linkages present?

• 5′ and 3′

• 1′ and 5′

• 5′ and 5′

• 3′ and 3′

Nucleic acids are the polymers of ______________.

• Nucleosides

• Nucleotides

• Bases

• Sugars

Which of the following statements is not true about glucose?

• It is an aldohexose.

• On heating with HI, it forms n-hexane.

• It is present in furanose form.

• It does not give 2,4-DNP test.