ATP Importance- Unit 3.1

Question 1

What main chemical processes is ATP required for?

Answer 1

Muscle contraction
Active transport
Photosynthesis
Reproduction & growth

Question 2

What is ATP?

Answer 2

Adenosine Tri Phosphate

Question 3

What is ATP’s structure?

Answer 3

Adenine base, ribose sugar, 3 phosphate groups

Question 4

What happens when ATP is hydrolysed?

Answer 4

ADP and phosphate are produced

Question 5

How is hydrolysis of ATP catalysed?

Answer 5

ATPase

Question 6

What can ADP be hydrolysed to?

Answer 6

AMP

Question 7

What is phsophorylation?

Answer 7

When phosphate is added to ADP/AMP to make ATP again

Question 8

Where does photophosphorylation occur?

Answer 8

Membranes of chloroplasts during photosynthesis

Question 9

Where does oxidative phosphorylation occur?

Answer 9

Membranes of mitochondria during aerobic respiration (cristae)

Question 10

Similarities between oxidative & photophosphorylation:

Answer 10

-Both use ATPase
-Have ETC by pumping protons to 1 side of membrane, the flow through ATPsynthase channel causing enzyme to spin & combine with ADP to make ATP
-Need 3 protons per ATP synthesis

Question 11

Differences between oxidative & photo:

Answer 11

-Ox occurs in cristae of membrane of mitochondria, photo occurs in thylakoid membranes of chloroplasts.
-Ox pumps protons from intermembrane space to matrix, photo pumps fromthylakoid space to stroma.
-Light needed for photo, oxidation occurs in ox.
-NAD/FAD used in ox, NADP in photo
-Final electron acceptor in ox is oxygen, in photo is NADP and chlorophyll