KCET · BIOLOGY · STD 12 - 5. Molecular Basis of Inheritance
In a 3.2 Kbp long piece of DNA, 820 adenine bases were found. What would be the number of cytosine bases?
- A 780
- B 1560
- C 740
- D 1480
Answer & Solution
Correct Answer
(A) 780
Step-by-step Solution
Detailed explanation
(A) 780,
Total DNA=3.2 Kbp=3200 bp
Adenine 820
According to Chargaff's rule
[A]=[T], [G]=[C]
So, Thymine = 820
Therefor, total AT content=820+820=1640
GC content=3200-1640=1560
So, cytosine \(=\frac{1560}{2}=780\)
Total DNA=3.2 Kbp=3200 bp
Adenine 820
According to Chargaff's rule
[A]=[T], [G]=[C]
So, Thymine = 820
Therefor, total AT content=820+820=1640
GC content=3200-1640=1560
So, cytosine \(=\frac{1560}{2}=780\)
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