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Biochemistry quiz - Nucleic acids
A nucleoside consists of
nitrogenous base
purine or pyrimidine base + sugar
purine or pyrimidine base + phosphorous
purine or pyrimidine base + sugar + phosphorous
A Purine nucleotide is
AMP
UMP
CMP
TMP
2,4-Dioxypyrimidine is
Thymine
Cytosine
Uracil
Guanine
The nucleic acid base found in mRNA but not in DNA is
Adenine
Cytosine
Thymine
Uracil
The chemical name of guanine is
2,4-Dioxy-5-methylpyrimidine
2-Amino-6-oxypurine
2-Oxy-4-aminopyrimidine
2,4-Dioxypyrimidine
The carbon of pentose in ester linkage with the phosphate in a nucleotide structure is
C1
C2
C4
C5
In RNA molecule
G=C
A=U
A=G
None of the above
The width (helical diameter) of the double helix in B form DNA in nm is
1
2
3
0.34
In a DNA molecule, the guanosine content is 40%, the adenine content will be
10%
20%
30%
40%
In DNA, three hydrogen bonds are formed between
Adenine and guanine
Adenine and thymine
Guanine and Cytosine
Cytosine and Thymine
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