While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were: Adenine = 29 %, Guanine = 17 %, Cytosine = 32 %,Thymine = 17 %. Considering the Chargaff's rule it can be concluded that

Question

While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were: Adenine = 29 %, Guanine = 17 %, Cytosine = 32 %,Thymine = 17 %. Considering the Chargaff's rule it can be concluded that (A) it is a double stranded circular DNA (B) it is single stranded DNA (C) it is a double stranded linear DNA  (D) no conclusion can be drawn

Tardigrade Admin · Accepted Answer

It cannot be a double stranded DNA because as per Chargaff's rule for a dsDNA, the ratios between adenine and thymine and guanine and cytosine are constant and equal. Hence, it is a ssDNA.

Q. While analysing the $D N A$ of an organism a total number of $5386$ nucleotides were found out of which the proportion of different bases were: Adenine = $29%$ , Guanine $= 17%$ , Cytosine $= 32%$ ,Thymine $= 17%$ . Considering the Chargaff's rule it can be concluded that

it is a double stranded circular $D N A$

it is single stranded $D N A$

it is a double stranded linear $D N A$

no conclusion can be drawn

It cannot be a double stranded $D N A$ because as per Chargaff's rule for a $d sD N A$ , the ratios between adenine and thymine and guanine and cytosine are constant and equal. Hence, it is a $ssD N A$ .

Q. While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were: Adenine = 29%, Guanine =17%, Cytosine =32%,Thymine =17%. Considering the Chargaff's rule it can be concluded that

it is a double stranded circular DNA

it is single stranded DNA

it is a double stranded linear DNA