Question

Length of dna is 1700a . the number of nucleotides it contains is

Answer 1

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Aysha asked in Biology

 if the length of E.coli DNA is 1.36mm, calculate the no.of base pairs in E.coli

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Surbhi Gupta answered this
628 helpful votes in Biology, Class VII

The distance between two consecutive base pairs is 0.34 × 10 -9 m

The total length of double helix DNA in an organism can be calculated by multiplying the total number of base pairs with the distance between two consecutive base pairs.

Total length of double helix DNA = total number of bp × distance between two consecutive bp

Let, the total number of bp be x

1.36mm = x × 0.34 × 10 -9 m

x = 1.36 ×10 -3 / 0.34 × 10 -9 m

x = 4 × 10 6 bp

The number of base pairs in the given strand of DNA of E.coli are 4 X 10 6 bp

Answer 2

Explanation:

The three components of a nucleotide are a 5-carbon sugar, a phosphate group, and a nitrogenous base.

• A nucleotide does not contain phospholipids; those are molecules that make up the cell membrane and nuclear envelope.