AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which has phosphate groups?
A
DNA
B
RNA
C
Both
Explanation: 

Detailed explanation-1: -Adenosine triphosphate (ATP) has one phosphate ester bond and two phosphate anhydride bonds.

Detailed explanation-2: -ADP, the “uncharged” version of the molecule, stands for adenosine diphosphate. The word diphosphate indicates that the molecule has 2 phosphate (PO3) groups.

Detailed explanation-3: -Both DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base.

Detailed explanation-4: -DNA and RNA, the genetic material of all living things, are nucleic acids. They are made up of nucleotides, which in turn are made up of a nitrogenous base, a 5-carbon sugar, and a phosphate group. The 5-carbon sugar and the phosphate group of each nucleotide attaches to form the backbone of DNA and RNA.

Detailed explanation-5: -A free, unincorporated nucleotide usually exists in a triphosphate form; that is, it contains a chain of three phosphates. In DNA, however, it loses two of these phosphate groups, so that only one phosphate is incorporated into a strand of DNA.

There is 1 question to complete.