Q26
Allen
1. GENETIC MATERIAL, DNA
MCQ
A single stranded DNA is present in:-
A.
TMV
B.
Salmonella
C.
Ļx174
D.
Bacteria
Q27
Allen
1. GENETIC MATERIAL, DNA
MCQ
What is the nature of the 2 strands of a DNA duplex ?
A.
Identical & Complimentary
B.
Antiparallel & complimentary
C.
Dissimilar & non complimentary
D.
Antiparallel & non complimentary
Q28
Allen
1. GENETIC MATERIAL, DNA
MCQ
On an average, how many purine Nā bases are present in single coil of DNA :-
A.
Four
B.
Five
C.
Ten
D.
Uncertain BMI022
Q29
Allen
1. GENETIC MATERIAL, DNA
MCQ
Distance between two nucleotide pairs of DNA is :-
A.
0.34 nm
B.
34 Ć
C.
3.4 Ī¼
D.
34 nm RMI023
Q30
Allen
1. GENETIC MATERIAL, DNA
MCQ
In a double strand DNA amount of Guanine is 35% then what will be the amount of cytosine:
A.
70%
B.
15%
C.
30%
D.
35%
Q31
Allen
1. GENETIC MATERIAL, DNA
MCQ
Chargaff 's rule is given as :-
A.
Purines ā Pyrimidines
B.
A + G = T+ C
C.
A+ U = G + C
D.
A + T / G + C = Const.
Q32
Allen
1. GENETIC MATERIAL, DNA
MCQ
In RNA, Nucleotides are bonded by :-
A.
H - bonds
B.
Phosphodiester bonds
C.
lonic bonds
D.
Salt linkage
Q33
Allen
1. GENETIC MATERIAL, DNA
MCQ
A nucleoside differs from a nucleotide is not having :-
A.
Phosphate
B.
Sugar
C.
Phosphate & sugar
D.
Nitrogen base
Q34
Allen
1. GENETIC MATERIAL, DNA
MCQ
Wilkins X-ray diffraction showed the diameter of the DNA helix is :-
A.
10 Ć
B.
20 Ć
C.
30 Ć
D.
40 Ć
Q35
Allen
1. GENETIC MATERIAL, DNA
MCQ
In the DNA of an animal percentage of Adenine is 30 then percentage of Guanine will be :-
A.
40
B.
30
C.
20
D.
70
Q36
Allen
1. GENETIC MATERIAL, DNA
MCQ
Length of one loop of B- DNA:-
A.
3.4 nm.
B.
0.34 nm.
C.
20 nm.
D.
10 nm.
Q37
Allen
1. GENETIC MATERIAL, DNA
MCQ
If base order in one chain of DNA is "ATCGA" then how many no. of H-bond found in DNA duplex :-
A.
20
B.
12
C.
10
D.
11
Q38
Allen
1. GENETIC MATERIAL, DNA
MCQ
In DNA purine nitrogen bases are :
A.
Uracil and Guanine
B.
Guanine and Adenine
C.
Adenine and cytosine
D.
None
Q39
Allen
1. GENETIC MATERIAL, DNA
MCQ
Two free ribonucleotide units are interlinked with :-
A.
Peptide bond
B.
Disulphide bond
C.
Hydrogen bond
D.
Phosphodiester bond
Q40
Allen
1. GENETIC MATERIAL, DNA
MCQ
Short DNA segment has 80 thymine and 90 guanine bases. The total number of nucleotides are :-
A.
160
B.
40
C.
80
D.
340
Q41
Allen
1. GENETIC MATERIAL, DNA
MCQ
Prokaryotic DNA is :-
A.
double stranded circular
B.
single stranded circular
C.
double stranded linear
D.
double stranded RNA as nucleic acid
Q42
Allen
1. GENETIC MATERIAL, DNA
MCQ
Nucleoside is :
A.
Polymer of nucleic acid
B.
Phosphoric acid + base
C.
Phosphoric acid + sugar + base
D.
Sugar + base
Q43
Allen
1. GENETIC MATERIAL, DNA
MCQ
The back bone of RNA is consists of which of the following sugar?
A.
Deoxyribose
B.
Ribose
C.
Sucrose
D.
Maltose
Q44
Allen
1. GENETIC MATERIAL, DNA
MCQ
In a nucleotide HāPOā binds to which carbon atom of pentose sugar?
A.
Only 1st carbon
B.
Only 3rd carbon
C.
Only 5th carbon
D.
Both 3rd and 5th carbon
Q45
Allen
1. GENETIC MATERIAL, DNA
MCQ
DNA is acidic due to:-
A.
Sugar
B.
Phosphoric acid
C.
Purine
D.
Pyrimidine
Q46
Allen
1. GENETIC MATERIAL, DNA
MCQ
RNA contains which of the following base, in place of Thymine of DNA?
A.
Thymine
B.
Uracil
C.
Adenine
D.
None of these
Q47
Allen
1. GENETIC MATERIAL, DNA
MCQ
Genetic information are transferred from nucleus to cytoplasm of cell through :-
A.
DNA
B.
RNA
C.
Lysosomes
D.
ACTH
Q48
Allen
1. GENETIC MATERIAL, DNA
MCQ
If one strand of double stranded DNA, consists of the sequence 3'-ATTCGTACā5', then the complementary sequence must be:-
A.
5'-UAAGCAUG-3'
B.
3'-TAAGCATGā5'
C.
5'-TAAGCATG-3'
D.
5'-TAAGCATGā3' in the reverse direction
Q49
Allen
1. GENETIC MATERIAL, DNA
MCQ
DNA molecule has uniform diameter due to:
A.
Double stranded
B.
Presence of phosphate
C.
Specific base pairing between purine and pyrimidine
D.
Specific base pairing between purine and purine
Q50
Allen
1. GENETIC MATERIAL, DNA
MCQ
Following structure is related to which
compound?
A.
Adenine
B.
Guanine
C.
Uracil
D.
Thymine