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

\(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.

(a)

Heptanoic acid

(b)

2-Iodohexane

(c)

Heptane

(d)

Heptanol

Among the following the achiral amino acid is ______.

(a)

2-ethylalanine

(b)

2-methylglycine

(c)

2-hydroxymethylserine

(d)

Tryptophan

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 pyrimidine bases present in DNA are ______.

(a)

Cytosine and Adenine

(b)

Cytosine and Guanine

(c)

Cytosine and Thiamine

(d)

Cytosine and Uracil

Complete hydrolysis of cellulose gives ______.

(a)

L-Glucose

(b)

D-Fructose

(c)

D-Ribose

(d)

D-Glucose

Insulin, a hormone chemically is ______.

(a)

Fat

(b)

Steroid

(c)

Protein

(d)

Carbohydrates

Which of the following are epimers?

(a)

D(+)-Glucose and D(+)-Galactose

(b)

D(+)-Glucose and D(+)-Mannose

(c)

Neither (a) nor (b)

(d)

Both (a) and (b)

Disaccharides have general formula

(a)

C_n(H₂O)_n

(b)

(CO₂)_n n,

(c)

C_n(H₂O)_n-1

(d)

C_n(H₂O)_2n-l

Sucrose is not

(a)

a di-saccharide

(b)

a non-reducing sugar

(c)

hydrolysed to only glucose

(d)

hydrolysed to glucose & fructose

Glucose is not oxidised to gluconic acid by

(a)

Br₂/H₂O

(b)

Fehling's solution

(c)

Tollen's reagent

(d)

Conc.HNO₃

Which is not true of amino acid?

(a)

amino acid forms zwitter ion

(b)

has isoelectric point

(c)

dual behaviours

(d)

amino acid is insoluble in NaOH solution

Ultimate products of hydrolysis of proteins is

(a)

aniline

(b)

aliphatic acid

(c)

amino acid

(d)

aromatic acid

Hair and nail contains

(a)

cellulose

(b)

fat

(c)

keratin

(d)

lipid

The oxide bridges through which a large number of monosaccharide units are linked in polysaccharides are called

(a)

peptide bond

(b)

hydrogen bond

(c)

nitrogen bond

(d)

glycosidic linkage

Sugars that yield two to ten monosaccharide molecules on hydrolysis is

(a)

monosaccharides

(b)

disaccharides

(c)

oligosaccharides

(d)

polysaccharides

Fructose is not oxidised by bromine water indicates

(a)

the presence of aldehydic group

(b)

presence of ketonic group

(c)

absence of aldehydic group

(d)

absence of ketonic group

An example for reducing disaccharide is

(a)

glucose

(b)

fructose

(c)

sucrose

(d)

lactose

On hydrolysis, which one of the following disaccharide will give a ketose and an aldose?

(a)

Maltose

(b)

Sucrose

(c)

Lactose

(d)

All the above

An example of non-protein amino acid is

(a)

Alanine

(b)

orinithine

(c)

proline

(d)

serine