Question

What is the number of thymine bases in a 340 nm strand of B-DNA in which 50% of the total bases are purines, out which 50% are adenine?
O
500
O
1000
0
2000
O
700​

Answer 1

Answer:

A double-stranded DNA molecule with 20% thymine would contain 30% guanine. Erwin Chargaff determined that species have almost equal levels of adenine...

Answer 2

250 is the number of thymine bases in a 340 nm strand of B-DNA in which 50% of the total bases are purines, out which 50% is adenine.

Explanation:

• As the normal length of a nucleotide is 3.4 Angstrom, therefore, there are 200 nucleotides existing in 68nm long DNA.
• 2 nucleotides form a base pair hereafter 100 base pairs are present. Adenine - Thymine creates a base pair with a dual hydrogen bond and Guanine-Cytosine creates base pair with a threefold bond.
• According to this puzzle, 25% of this DNA molecule consists of Adenine which suggests that similar per cent of thymine is being as well making 50% DNA as Adenine-Thymine base pair (50 base pairs) while the base of the 50% DNA consists of Guanine-Cytosine base pairs).
• Based on this number of hydrogen bonds existing are,

$2X50+3X50=250$

To learn more:

A 340A° long segment of DNA has 20 thymine nitrogen bases, what ...

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