Unit 5 - Photosynthesis

Question 1

Autotrophs

Answer 1

An organism that makes their own food (complex organic compounds) from inorganic molecules using energy (chemical/ light)
Producers in an ecosystem

Question 2

Relationship between respiration and photosynthesis

Answer 2

All organisms respire but not all photosynthesise
Reverse processes

Question 3

When do plants photosynthesise

Answer 3

In the day but always respire
The intensity of light has to be sufficient to allow photosynthesis to replenish carbs used in respiration

Question 4

Factors affecting photosynthesis

Answer 4

Light Intensity
CO2 conc.
Temp
Water stress

Question 5

Temp as factor of photosynthesis

Answer 5

25 - 30 degrees: rate increases
30 - 45 degrees: O2 more successfully competes w/ CO2 for active site of RuBisCO
> 45 degrees: Enzymes denature