AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
There are ____ phosphate groups on ATP and ____ on ADP.
A
3 / 2
B
3 / 3
C
2 / 3
D
2 / 2
Explanation: 

Detailed explanation-1: -ATP or adenosine triphosphate is composed of one adenine molecule, a ribose sugar and three phosphate groups. Its chemical formula is C10H16N5O13P3. ADP or adenosine diphosphate is composed of one adenine molecule, a ribose sugar and two phosphate groups.

Detailed explanation-2: -ATP Structure and Function ATP (adenosine triphosphate) has three phosphate groups that can be removed by hydrolysis to form ADP (adenosine diphosphate) or AMP (adenosine monophosphate). If there are no phosphates at all, the molecule is referred to as a “nucleoside", rather than a “nucleotide".

Detailed explanation-3: -ATP stands for adenosine triphosphate. The word triphosphate indicates that the molecule has 3 phosphate groups. ATP stores energy within the bonds between phosphate groups, especially the second and third.

Detailed explanation-4: -ATP is a nucleotide consisting of an adenine base attached to a ribose sugar, which is attached to three phosphate groups. These three phosphate groups are linked to one another by two high-energy bonds called phosphoanhydride bonds.

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