Photosynthesis - Unit 3

Question 1

Where are chloroplasts located and why are they green?

Answer 1

Cytoplasm, due to chlorophyll

Question 2

What does chlorophyll do in photosynthesis?

Answer 2

Traps light energy from the sun and converts to chemical energy

Question 3

How can glucose be used?

Answer 3

-stored as starch
-used for respiration
-used to make cellulose

Question 4

Describe what happens in the first stage of photo synthesis

Answer 4

Light reactions
-Water splits to form oxygen and hydrogen in the chloroplasts
-excess oxygen diffuses out the leaf
-light energy is converted to chemical energy (ATP)
-ATP and hydrogen transferred to stage 2

Question 5

Describe what happens in the second stage of photosynthesis

Answer 5

Carbon fixation
-series of enzyme reactions
-ATP provides energy
-Hydrogen from stage ones forms with Carbon dioxide from the air to provide glucose

Question 6

What are the three limiting factors of photosynthesis?

Answer 6

-Temperature
-Carbon dioxide concentration
-light intensity