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WorksheetsDNA
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
The accepted hypothesis for DNA replication isdispersive theory
a)
conservative theory
b)
dispersive theory
c)
semi-conservative theory
d)
evolutionary theory
2.
Which is the largest among the followings?
a)
Nucleotide
b)
Nitrogenous base
c)
Phosphate
d)
Carbon
3.
In DNA double helix, the two DNA chains are held together by
a)
covalent bonds between the pair of bases
b)
hydrogen bonds between the pair of bases
c)
ionic bonds between the pair of bases
d)
none of the above
4.
Messelsen and Stahl model of replication was called
a)
conservative replication
b)
semi-conservative replication
c)
dispersive replication
d)
Cri du Chat
5.
DNA replication takes place in which direction?
a)
3' to 5'
b)
5 'to 3'
c)
Randomly
d)
Vary from organism to organism
6.
In DNA, there are
a)
five bases known as adenine, guanine, thymine, tryptophan and cytosine
b)
four bases known as adenine, guanine, thymine and cytosine
c)
three bases known as adenine, guanine and cytosine
d)
only two bases known as adenine and cytosine
7.
In DNA, guanine pairs with
a)
Thymine
b)
Uracil
c)
Adenine
d)
Cytosine
8.
Which of the following is incorrect?
a)
In DNA double helix, two strands of the DNA are bound with each other with the bases
b)
Adenine always pairs with thymine
c)
Guanine always pairs with the cytosine
d)
None of the above
9.
The overall conclusion of the Hershey-Chase experiment was that
a)
DNA was responsible for heredity
b)
proteins and DNA were responsible for heredity
c)
the ratio of Adenine to thymine was always the same
d)
phage DNA was similar to bacterial DNA
10.
If one cell has AT contents 40%, what will be the percentage of Guanine residue?
a)
60%
b)
15%
c)
30%
d)
Guanine residue can not be calculated
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