Photosynthesis

Question 1

Balanced equation for photosynthesis

Answer 1

6CO\2 + 6H\2O + Light —Chlorophyll—> C\6H\12O\6 + 6O\2

Question 2

Site of photosynthesis

Answer 2

Chloroplast

Question 3

Photosynthesis Experiment:

Plant used
AND
Reason
AND
How to measure rate of photosynthesis

Answer 3

Elodea

It is an underwater plant so bubbles of oxygen can be seen as they are produced.

Count number of bubbles produced per minute.

Question 4

Photosynthesis Experiment:

Explain graph

Answer 4

Rate of photosynthesis increases as light intensity increases until the saturation point is reached where there is a constant rate of photosynthesis.

Question 5

Main events of the LIGHT STAGE

Answer 5

Energized electrons leave chlorophyll.

PATHWAY 1:
Lose energy, return to chlorophyll.

PATHWAY 2:
Lose energy, combine with NADP+ to form NADP-.

Question 6

Is the DARK STAGE anabolic or catabolic

Answer 6

Anabolic, because smaller molecules form larger molecules.

Catabolic Respiration Anabolic Photosynthesis

Question 7

What happens at the end of the DARK STAGE

Answer 7

ADP and NADP+ return to the LIGHT STAGE.

Question 8

Two types of particle transferred in the DARK STAGE

Answer 8

Electrons and Protons

Question 9

End products of the LIGHT STAGE

Answer 9

ATP, NADPH, Oxygen

Question 10

Where does the DARK STAGE take place?

Answer 10

Stroma of the chloroplast, controlled by enzymes

Question 11

Main events of photosynthesis

Answer 11

• Light energy is absorbed by chlorophyll
• Water is split
• The electrons are passed to chlorophyll
• The protons are stored in the chloroplasts
• The oxygen is released
• Sunlight transfers energy to electrons
• The high energy electrons, stored protons (the hydrogen ions) and carbon dioxide are used to make glucose