201. Which of the following is the sweetest sugar?
A
Sucrose
B
Glucose
C
Fructose
D
Maltose
Answer :
Fructose
202. Glucose molecule reacts with $$X$$ number of molecules of phenylhydrazine to yield osazone. The value of $$X$$ is
A
three
B
two
C
one
D
four
Answer :
three
203. Glucocorticoids
A
control the carbohydrate metabolism
B
modulate inflammatory reactions
C
are involved in the responses to stress
D
all of these
Answer :
all of these
204. Which of the following does not reduce Benedict’s solution ?
A
Glucose
B
Fructose
C
Sucrose
D
Aldehyde
Answer :
Sucrose
205.
The increasing order of $$pKa$$ of the following amino acids in aqueous solution is :
$$Gly{\text{ }}Asp{\text{ }}Lys{\text{ }}Arg$$
A
$$Asp < Gly < Arg < Lys$$
B
$$Gly < Asp < Arg{\text{ }} < {\text{ }}Lys$$
C
$$Asp < Gly < Lys < Arg$$
D
$$Arg{\text{ }} < Lys < Gly < Asp$$
Answer :
$$Asp < Gly < Lys < Arg$$
206. Which of the following statements is not correct?
A
Only $$\alpha $$ - amino acids are obtained on hydrolysis of proteins.
B
The amino acids which are synthesised in the body are known as non-essential amino acids.
C
There are 20 essential amino acids.
D
$$L$$ - amino acids are represented by writing the $$ - N{H_2}$$ group on the left side.
Answer :
There are 20 essential amino acids.
207. Most common types of secondary structures of proteins are
A
$$\alpha $$ - helix and $$\beta $$ - helix structures
B
$$\alpha $$ - helix and $$\beta $$ - pleated sheet structures
C
right and left hand twisted structures
D
globular and fibrous structures
Answer :
$$\alpha $$ - helix and $$\beta $$ - pleated sheet structures
208. A compound which contains both ________ and ________ is called amino acid. The amino acids in polypeptide chain are joined by ________ bonds.
A
amino, carboxylic group, ester
B
amino, carboxylic group, peptide
C
nitrogen, carbon, glycosidic
D
hydroxy, carboxylic group, peptide
Answer :
amino, carboxylic group, peptide
209. Keratin, a structural protein is present in
A
hair
B
wool
C
silk
D
all of these
Answer :
all of these
210. The number of amino acids required for protein synthesis is
A
20
B
25
C
10
D
100
Answer :
20