Chapter 7 outline

Question 1

How is a field an energy plantation?

Answer 1

Living solar panels capture sunlight to produce food as long as the sunlight is available and shining.

Question 2

Where are chloroplasts found in plants? What are thylakoids?

Answer 2

Chloroplasts = Leaves
Thylakoids = stacked green pancakes

Question 3

What creates high energy electrons and why are they important?

Answer 3

1. Sunlight
2. Shuttles
3. Food

Question 4

What is the light reaction?

Answer 4

Light reaction is when chlorophyll in the thylakoid membranes absorbs solar energy which is then converted to chemical energy of ATP & NADH.

Question 5

What is dark reaction?

Answer 5

The Calvin Cycle / dark reaction makes sugars from carbon dioxide. CO2 comes in & makes sugars from carbon dioxide C6H12O6.

Question 6

What kind of energy conversion takes place during photosynthesis?

Answer 6

Photosynthesis is a two-step process light reaction followed by dark reaction. The light reactions convert solar energy to chemical energy.

Question 7

What is the role of chlorophyll?

Answer 7

Chlorophyll molecules absorb light energy to provide energy for photosynthesis.

Question 8

What are photosystems?

Answer 8

Photosystems are when pigments are organized into light-gathering complexes. When a pigment molecule absorbs a photon, one of the pigment’s electrons gains energy. Thus making the electron “excited”. The “excited” electron is unstable and falls back to the ground.

Question 9

How is the Calvin cycle a sugar factory?

Answer 9

Calvin cycle is a sugar factory within a chloroplast. The inputs are CO2 from air as well as ATP & NADPH produced by the light reactions. Using carbon from CO2, energy from ATP, and high-energy electrons from NADPH, the Calvin cycle constructs glucose.

Question 10

What is G3P?

Answer 10

The plant cells use the G3P as raw material to make glucose & other organic compounds.

Question 11

What are C3 plants?

Answer 11

-get CO2 directly from the air
-common & widely distributed
-almost every plan is carbon C3 plant

Question 12

What are C4 plants?

Answer 12

-close their stomata to save water during hot dry weather. Cactus are C4 plants
-with stomata closed CO2 can not get in but they can still do light reaction.
-can still carry out photosynthesis

Question 13

What are CAM plants?

Answer 13

-open their stomata only at night to collect CO2
-plant/tree-dry Mediterranean climate