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Many nucleotides joins in a specific manner and form a polynucleotide…….
a) ring                                    

b) circle
c) strand                                               

d) rectangle

c

How many strands of polynucleotides are coiled together to form DNA molecule?
a) two

b) three                 

c) four

d) twenty

a

Explanation:two strands of polynucleotides coils with each other like a ladder in DNA


In a DNA molecule, which of the following links with adenine in opposite strand?
a) guanine                                            

b) cytosine
c) adenine                                            

d) thymine

d

In a DNA molecule, which of the following links with thymine in opposite strand?
a) guanine                                            

b) cytosine
c) adenine                                            

d) thymine

c

In a DNA molecule, which of the following links with cytosine in opposite strand?
a) guanine                                           

b) cytosine
c) adenine                                            

d) thymine

a

In a DNA molecule, which of the following links with guanine in opposite strand?
a) guanine                                            

b) cytosine
c) adenine                                            

d) thymine

b