The correct corresponding order of names of four aldoses with configuration given below Respectively is ______.

(a)

L-Erythrose, L-Threose, L-Erythrose, D-Threose

(b)

D-Threose, D-Erythrose, L-Threose, L-Erythrose,

(c)

L-Erythrose, L-Threose, D-Erythrose, D-Threose

(d)

D-Erythrose, D-Threose, L-Erythrose, L-Threose

In a protein, various amino acids linked together by ______.

(a)

Peptide bond

(b)

Dative bond

(c)

\(\alpha\) - Glycosidic bond

(d)

\(\beta\) - Glycosidic bond

In aqueous solution of amino acids mostly exists in ______.

(a)

NH₂-CH(R)-COOH

(b)

NH₂-CH(R)-COO^-

(c)

H₃N⁺-CH(R)-COOH

(d)

H₃N⁺-CH(R)-COO^-

The secondary structure of a protein refers to ______.

(a)

fixed configuration of the polypeptide backbone

(b)

hydrophobic interaction

(c)

sequence of α-amino acids

(d)

\(\alpha-\)helical backbone.

Complete hydrolysis of cellulose gives ______.

(a)

L-Glucose

(b)

D-Fructose

(c)

D-Ribose

(d)

D-Glucose

Glucose is an aldose. Which one of the following reactions is not expected with glucose?

(a)

It does not form oxime

(b)

It does not react with Grignard reagent

(c)

It does not form osazones

(d)

It does not reduce tollens reagent

If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ______.

(a)

TACGAACT

(b)

TCCGAACT

(c)

TACGTACT

(d)

TACGRAGT

Name the base present only in RNA

(a)

adenine

(b)

guanine

(c)

uracil

(d)

thymine

Identify the reducing sugar.

(a)

Sucrose

(b)

Cellulose

(c)

Starch

(d)

Glucose

Inversion of sucrose refers to

(a)

oxidation of sucrose

(b)

reduction of sucrose

(c)

hydrolysis of sucrose to glucose and fructose

(d)

polymerisation of sucrose

Denaturation does not involve

(a)

breaking up of H-bonding in proteins

(b)

the loss of biological action of enzyme

(c)

the loss of secondary structure

(d)

loss of primary structure of proteins

Which among the following contains triglyceride?

(a)

Wax

(b)

Cooking oil

(c)

Essential oil

(d)

Albumin

The ultimate product of hydrolysis of starch in the presence of dilute acid is

(a)

dextrin

(b)

maltose

(c)

maltase

(d)

glucose

Glucose + aceticanhydrid \(\overset { pyridine }{ \longrightarrow } ?\)

(a)

di acetate

(b)

tetra acetate

(c)

penta acetate

(d)

hexa acetate

Which among the following bases in not found in RNA?

(a)

cytosine

(b)

guanine

(c)

uracil

(d)

thymine

What type of linkages hold together monomers of DNA?

Name the Vitamins whose deficiency cause i) rickets ii) scurvy

Write a short note on peptide bond.

A sugar contains 4 carbon atoms and the functional group is -CHO group. Identify the type of sugar and give an example for it.

What is epimerisation?

What is meant by blood sugar?

Distinguish between fibrous and globular proteins.

How are lipids classified?

Name the vitamin responsible for coagulation of blood.

Distinguish between nucleosides and nucleotides.

Give two difference between Hormones and vitamins.

What are reducing and non – reducing sugars?

Classify the following into monosaccharides, oligosaccharides and polysaccharides.
i) Starch
ii) fructose
iii) sucrose
iv) lactose
iv) maltose

How are vitamins classified?

Explain the reaction which indicates the presence of ketonic group in fructose.

Justify the presence of keto group in C₂ in fructose.

Distinguish between fat soluble and water soluble vitamins.

How do enzymes help a substrate to be attacked by the reagent effectively?

Give the structure of sucrose.

Write note on oligosaccharides and polysaccharides with examples.

Write the structure of all possible dipeptides which can be obtained form glycine and alanine

Write a note on formation of α-helix .

Give the uses of carbohydrates.

Elucidate the structure of fructose.

List the importance of proteins in biological processes.

Outline the classification of carbohydrates giving example for each.

Distinguish glucose from fructose.