Ch. 10 Quiz

Question 1

To promote plant growth, lights called “grow lights” should produce light enriched in what wavelengths?

Answer 1

Red and blue

Question 2

Which of the following is not a protective adaptation against intense sunlight?

Answer 2

Abundant chlorophyll

Question 3

The main advantage of Kranz anatomy is..

Answer 3

RuBP carboxylase is found only in bundle sheath chloroplasts

Question 4

The ultimate source of elections for photosynthesis is ___.

Answer 4

H2O

Question 5

In yards, crab grass, a C4 plant, grows very efficiently and can usually outcompete the more desirable Kentucky bluegrass, a C3 plant. Crab grass grows so well because..

Answer 5

All of the above

• it contains PEP carboxylase, which has a high affinity for CO2
• CO2 concentrations inside the leaves are low, so CO2 diffuses into the leaves rapidly
• photorespiration is low
• it’s H2O lost/CO2 absorbed ratio is low

Question 6

If you identified a desert plant as belonging to the family Crassulaceae, it would very likely..

Answer 6

Open it’s stomates at night and close them during the day

Question 7

If light strikes photosystem I in an intact chloroplast, it is..

Answer 7

Absorbed by chlorophyll a or an accessory pigment and the energy transferred to P700, which passes an election to an electron acceptor

Question 8

The energy to synthesize ATP during photophosphorylation comes directly from..

Answer 8

The flow of protons from thylakoid lumen to the stroma through ATP synthetase channels

Question 9

Photosystem I produces ___.

Answer 9

NADPH

Question 10

The most unstable way to store energy in a cell is in the form of ___.

Answer 10

ATP