Q.1.
Thiol group is present in [ IIT 2016]
-
9%
a) cyctine
-
39%
b) cystein
-
39%
c) methionine
-
14%
d) cytosin
Q.2.
Which of the following pairs give positive Tollen's test? [ IIT 2004]
-
19%
a) Glucose, sucrose
-
60%
b) Glucose, fructose
-
13%
c) Hexanal, acetophenone
-
9%
d) Fructose, sucrose
Q.3.
During the process of digestion, the proteins present in food materials are hydrolysed to amino aacids. the two enzymes involved in the process are respectively
-
20%
a) amylase and maltase
-
11%
b) diastase and lipase
-
42%
c) pepsin and trypsin
-
27%
d) invertase and zymase
Q.4.
Which functional group participates in disulphide bond formation in proteins? [ AIPMT 2005]
-
7%
a) Thiolactone
-
57%
b) Thiol
-
33%
c) Thioether
-
2%
d) Thioester
Q.5.
The cell membranes are mainly composed of [ AIPMT 2005]
-
18%
a) carbohydrates
-
28%
b) proteins
-
49%
c) phospholipids
-
5%
d) fats
Q.6.
Synthesis of each molecule of glucose in photosynthesis involves ... [ IIT 2013]
-
56%
a) 18 molecules of ATP
-
19%
b) 10 molecules of ATP
-
14%
c) 8 molecules of ATP
-
11%
d) 6 molecules of ATP
Q.7.
Assertion: Starch is consists of amylose and amylopectin Reason: The glucose molecules in starch joined by α1,4 linkage
-
42%
a) Both Assertion and Reason are true and the Reason is correct explanation of Assertion
-
44%
b) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
-
14%
c) Assertion is true, but Reason is false
-
0%
d) Assertion and Reason are false
Q.8.
The helical structure of protein is stabilised by ...[ AIPMT 2004]
-
12%
a) dipeptide bonds
-
44%
b) hydrogen bonds
-
3%
c) ether bonds
-
41%
d) peptide bonds
Q.9.
Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution? [ IIT 2017]
-
8%
a)
-
32%
b)
-
24%
c)
-
36%
d)
Q.10.
Number of chiral carbon atoms in β-D-(+)-glucose is ...[ AIPMT 2004]
-
31%
a) five
-
31%
b) six
-
17%
c) three
-
21%
d) four
Q.11.
he correct statement in respect of protain haemoglobin is that it ....[ AIPMT 2004]
-
11%
a) functions as a catalyst for biological reactions
-
15%
b) maintains blood sugar level
-
67%
c) act as an oxygen carrier in the blood
-
7%
d) forms antibodies and offers resistance to diseases
Q.12.
The hormone that helps in the conversion of glucose to glycogen is ... [ AIPMT 2004]
-
15%
a) cortisone
-
0%
b) bile acids
-
19%
c) adrenaline
-
65%
d) insulin
Q.13.
A sequence of how many nucleotides in messenger RNS makes a codon for an amino acid? [ AIPMT 2004]
-
61%
a) Three
-
25%
b) Four
-
4%
c) One
-
11%
d) Two
Q.14.
Which of the following is incorrect statement? [ AIPMT 2001]
-
14%
a) Starch is a polymer of α-glucose
-
17%
b) Amylose is a component of cellulose
-
48%
c) Proteins are composed of only type of amino acid
-
21%
d) In cyclic structure of fructose, there are four carbons and one oxygen atom
Q.15.
Chargaff's rule states that in an organism ...[ AIPMT 2003]
-
26%
a) amount of adenine (A) is equal to that of cytosine (C) and the amount of thymine (T) is equal to that of guanine (G)
-
13%
b) amounts of all bases are equal
-
57%
c) amount of adenine (A) is equal to that of thymine (T) and the amount of guanine (G) is equal to that of cytosine (C)
-
4%
d) amount of adenine (A) is equal to that of guanine (G) and the amount of thymine (T) is equal to that of cytosine (C)
Q.16.
Phospholipids are esters of glycerol with ... [ AIPMT 2003]
-
33%
a) one carboxylic acid residue and two phosphate groups
-
25%
b) three phosphate groups
-
12%
c) three carboxylic acid residues
-
29%
d) two carboxylic acid residues and one phosphate groups
Q.17.
Vitamin-B12 contains ... [ AIPMT 2003]
-
23%
a) Zn(II)
-
23%
b) Ca(II)
-
23%
c) Fe(II)
-
31%
d) Co(II)
Q.18.
Which is not true statement? [ AIPMT 2002]
-
24%
a) α-carbon of α-amino acid is asymmetric
-
16%
b) All proteins are found in L-form
-
44%
c) Human body can synthesise all proteins thay need
-
16%
d) At pH = 7 both amino anda carboxylic groups exist in ionised form
Q.19.
Which statement is incorrect about peptide bond [AIPMT 2001]
-
35%
a) C - N bond length in proteins is longer than usual bond length of C-N bond
-
10%
b) Spectroscopic analysis show planar structure of
-
45%
c) C - N bond length in proteins is smaller than usual bond length of C - N bond
-
10%
d) None of the above
Q.20.
hich one of the following bases is not present in DNA? [ IIT 2014 ]
-
72%
a) Quinoline
-
12%
b) Adenine
-
4%
c) Cytosine
-
12%
d) Thymine