The end products of the light dependent reactions of photosynthesis are a. ADP, H 2 O, NADPH b. ADP, PGAL, RuBP (RuDP) c. ATP, CO 2 , H 2 O d. ATP, NADPH, O 2 e. CO 2 , H + , PGAL

Answer: d

The function of water in photosynthesis is to a. combine with CO 2 b. absorb light energy c. supply electrons in the light-dependent reactions d. Transport H + ions in the light-independent (dark) reactions e. Provide O 2 reactions for the light-independent

Answer: c

When hydrogen ions are pumped out of the chloroplast stroma, across the thylakoid membrane, and into the thylakoid space, the result is a. damage to the chloroplast.

b. the reduction of NAD c. the restoration of the Na-K balance across the membrane.

d. the creation of a proton gradient.

e. the lowering of pH in the chloroplast stroma.

Answer: d

Which of the following processes is carried out more efficiently by a C 4 a C 3 plant?

plant than by a. Light absorption b. Chemiosmotic coupling c. Photolysis d. Fixation of CO 2 e. Transport of sugars

Answer: d

Needed: Light Photons (discrete packets of energy)

High energy photons (UV and above) cause cellular damage by denaturing organic molecules Only ~ 42% of solar radiation Makes it to the surface

Needed: Chlorophyll

(blue green in color) (yellow green in color)

Also present: Carotenoids

(chlorophyll In membranes)

Thylakoid space Stroma

Comparison of chemiosmosis in mitochondria and chloroplasts Electron source Site of hydrogen reservoir Site of ATP synthesis Mitochondria Chemical energy from food molecules Chloroplast Light energy from photons Intermembrane space Thylakoid lumen Mitochondrial matrix Chloroplast stroma

Comparison of chemiosmosis in mitochondria and chloroplasts

Campbell; Fig. 10.15

(PGAL) (PGAL) (PGA) (PGAP)

The function of water in photosynthesis is to a. combine with CO 2 b. absorb light energy c. supply electrons in the light-dependent reactions d. Transport H + ions in the light-independent (dark) reactions e. Provide O 2 reactions for the light-independent

Answer: c

The end products of the light dependent reactions of photosynthesis are a. ADP, H 2 O, NADPH b. ADP, PGAL, RuBP (RuDP) c. ATP, CO 2 , H 2 O d. ATP, NADPH, O 2 e. CO 2 , H + , PGAL

Answer: d

Which of the following processes is carried out more efficiently by a C 4 a C 3 plant?

plant than by a. Light absorption b. Chemiosmotic coupling c. Photolysis d. Fixation of CO 2 e. Transport of sugars

Answer: d

When hydrogen ions are pumped out of the chloroplast stroma, across the thylakoid membrane, and into the thylakoid space, the result is a. damage to the chloroplast.

b. the reduction of NAD c. the restoration of the Na-K balance across the membrane.

d. the creation of a proton gradient.

e. the lowering of pH in the chloroplast stroma.

Answer: d