Question

question 27
how many phosphate groups are present in a single strand of dna?
o the same number as there are adenine bases
o the same number as there are adenine + thymine bases
o the same number as there are adenine + thymine + guanine + cytosine bases
o the same number as there are guanine + cytosine bases

Explanation:

A DNA strand is made up of nucleotides. Each nucleotide has one phosphate group. The total number of nucleotides in a single - strand of DNA is equal to the sum of all types of nitrogenous bases (adenine + thymine + guanine + cytosine) in that strand. So, the number of phosphate groups is the same as the total number of bases (adenine + thymine + guanine + cytosine).

Answer:

the same number as there are adenine + thymine + guanine + cytosine bases