bio exam #3

Question 1

What does photosynthesis use and produce?

Answer 1

Reduction of Co2 and H2O to build sugars to generate ATP

Question 2

T/F ATP synthase exists among all living organisms & work similar to each other.

Answer 2

True

Question 3

What is metabolism?

Answer 3

oxidation of sugars to generate ATP.

Question 4

Autroph

Answer 4

produce complex organic molecules (glucose/starch) and form inorganic molecules Co2 and H2O.

Question 5

How many reactions of photosynthesis are there?

Answer 5

2 reactions: light reaction, and Calvin cycle

Question 6

Photoautroph

Answer 6

transform sunlight into ATP to produce organic molecules (sugars/starch) from simple inorganic molecules like Co2 and H2o.

Question 7

What is an example of a photoautroph?

Answer 7

plants, protists, and prokaryotes (bc they’re photosynthetic)

Question 9

What primary producers use light as an energy source?

Answer 9

photoautrophs

Question 10

What do light reactions need and produce?

Answer 10

Need: sunlight
Produce: ATP & NADPH

Question 11

What does the Calvin cycle do?

Answer 11

Light-independent reaction
Uses: ATP, NADPH
Makes: sugar

Question 12

Where in a plant cell is light absorbed for photosynthesis?
a. stroma
b. thylakoid membranes
c. inner chloroplast membrane
d. matrix
e. cytoplasm

Answer 12

b) thylakoid membranes

Question 13

Which of the following are produced during the light reaction of photosynthesis?
a. glucose, ADP, NADP+
b. glucose, ADP, NADP+, CO2
c. ADP, NADP+, O2
d. ATP, NADPH, O2
e. ATP, NADPH, CO2

Answer 13

d) ATP, NADPH, O2

Question 14

The electrons needed to keep
photosynthesis running come from
a. CO2
b. O2
c. ATP
d. H2O
e. NADPH

Answer 14

d) H20 (splitting of H2O)

Question 15

The final electron acceptor in the light reactions of
photosynthesis is
a. CO2
b. O2
c. ATP
d. H2O
e.NADP+

Answer 15

e) NADP+

Question 16

Which of the following is NOT true?
a. ATP is produced during respiration, but not during photosynthesis
b. Photosynthesis is powered by light energy, respiration by the
chemical energy of fuel molecules.
c. Photosynthesis consumes CO2; respiration consumes O2
d. Photosynthesis produces O2; respiration produces CO2
e. The principal electron carrier in photosynthesis is NADPH; the
principal electron carrier in cellular respiration is NADH.

Answer 16

A)

Question 17

What gets used in the Calvin cycle?

Answer 17

6 ATP & 6 NADPH
(need 3C’s to make 6C glucose)

Question 18

Why is there no ATP synthase in the middle of the thylakoid membrane?

Answer 18

the concentration of H+ will be relatively the same, so it would not support the creation of ATP.