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Quiz 3
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Q.1
Two forms of D-glucopyranose, are called ....
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a) enantiomers
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b) anomers
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c) epimers
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d) diastereomers
Explanation
Answer:(b)
Q.2
Which of the following is correct statement? [ AIPMT 2001]
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a) Starch is a polymer of α-glucose
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b) Amylose is a component of cellulose
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c) Proteins are composed of only one type of amino acid
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d) In cyclic structure of fructose, there are four carbons and one oxygen atom
Explanation
Answer:(a)
Q.3
Which of the following is correct about H-bonding in nucleotide? [ AIPMT 2001]
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a) A-T, G-C
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b) A-G, T_C
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c) G-T, A-C
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d) A-A, T_T
Explanation
Answer:(a)
Q.4
Which one of the following gives positive Fehling's solution test? [ AIPMT 2001]
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a) Sucrose
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b) Glucose
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c) Fats
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d) Protein
Explanation
Answer:(b)
Q.5
The hormone whiich controls the processeslike burning of fats, proteins and carbohydrates to liberate energy in the body is [ AIPMT 2000]
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a) Cortisone
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b) throxine
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c) adrenaline
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d) insulin
Explanation
Answer:(b)
Q.6
α-D-(+)-glucose and β-D-(+)-glucose are [ AIPMT 2000]
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a) anomers
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b) epimers
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c) enantiomers
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d) geometrical isomers
Explanation
Answer:(a)
Q.7
Which one of the following has magnesium? [ AIPMT 2000]
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a) Vitamin-B12
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b) Chlorophyll
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c) Haemocyanin
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d) Carbonic anhydrase
Explanation
Answer:(b)
Q.8
In DNA, the complementary bases are [ AIPMT 2008]
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a) adenine anad thymine, guanine and cytosine
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b) uracil and adenine, cytosine and guanine
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c) adenine and guanine, thymine and cytosine
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d) adenine and thymine, guanine and uracil
Explanation
Answer:(a)
Q.9
the number of molecules of ATP produced in the lipid metabolism of a molecule of palitic acid is ...[ AIPMT 1998]
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a) 130
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b) 36
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c) 56
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d) 86
Explanation
Answer:(a)
Q.10
Glucose molecule reacts with 'X' number of molecules of phenyl hydrazine to yield osazone. the value of 'X' is ...[ AIMPT 1998]
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a) four
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b) one
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c) two
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d) three
Explanation
Answer:(d)
Q.11
Haemoglobin is [ AIPMT 1997]
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a) an enzyme
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b) a globular protein
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c) a vitamin
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d) a carbohydrate
Explanation
Answer:(b)
Q.12
Sucrose in water is dextrorotatory [α]D = +66.4° when boiled with dil. HCL, the solution becomes leavorotatory, [α]D = -39.9°. in this process the sucrose breaks into ...[ AIPMT 1996]
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a) L-glucose + D-fructose
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b) L-glucose + L-fructose
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c) D-glucose + D-fructose
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d) D-glucose + L-fructose
Explanation
Answer:(c)
Q.13
The α-D-glucose and β-D-glucose fiffer from each other due to difference in carbon atom with respect to its ...[ AIPMT 1995]
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a) conformation
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b) configuation
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c) number of OH-groups
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d) size of hemiacetal ring
Explanation
Answer:(b)
Q.14
The couplings between base units of DNA is through ...[ AIPMT 1992]
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a) hydrogen bonding
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b) electrostatic bonding
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c) covalent bonding
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d) van der Waal's forces
Explanation
Answer:(a)
Q.15
On hydrolysis of starch, we finally get [ AIPMT 1991]
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a) glucose
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b) fructose
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c) Both (a) and (b)
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d) sucrose
Explanation
Answer:(a)
Q.16
Asserion: Peptide bond is covalent bond Reason: Disulphide bond is formed by two cysteine amino acids
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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)
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b) amounts of all bases are equal
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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)
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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)
Explanation
Answer:(b)
0 h : 0 m : 1 s
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