ATP synthesis from ADP and a phosphate group occurs via a dehydration reaction,and is the reverse process of ATP hydrolysis. The reaction for ATP dehydrationsynthesis is:

ADP + P -> ATP + water / \

Overall, this reaction is:

a) exothermic because ATP is produced, which is a source of energy.

b) exothermic because it is a dehydration reaction._ ___ __

c^rendotherrriicmecausfTenergy is needed to form the phosphoester bongun ATP.~ - ^d) enoothermic because the bonds that are formed are weaker than the bonds that

are broken.

(No explanation needed)

<>rt answer. Use the following cartoon diagram of a short section of DNA to answerthe following questions. Complete sentences are NOT required.

Label the 2 strands to show theirdirections (3' and 5' ends).

8 What type of bond is indicatedDY the arrow labeled G?

9. What structure or group doesthe^tructure labled D represent?t e ^ t

i /pA

1 0, What is the general term for thenrcled structure?

i ,. What is the general term for thestructures labeled A, C, E and

CH,

D

-f

s'-si 2 What are the specific names of the structures labeled A, C, E and F?

F = Purin &