Factors Affecting

Question 1

What are limiting factors?

Answer 1

-when one of the factors needed for a plant to photosynthesise is in short supply
-it reduces the rate of photosynthesis

Question 2

What are the 3 factors that affect photosynthesis?

Answer 2

1. light intensity
2. CO2 concentration
3. temperature

Question 3

How does a decrease in light affect photosynthesis?

Answer 3

= decreased rate of LDR = reduced ATP + NADP
-ATP + NADPH are needed to convert GP to TP
-conc of GP increases, conc of TP decreases
-less TP to regenerate RuBP = less of it

Question 4

How does an increase/decrease in temperature affect photosynthesis?

Answer 4

-enzyme + substrate molecules have less KE = fewer successful collisions = reduced rate or reaction

Question 5

How does a decreased CO2 concentration affect photosynthesis?

Answer 5

-decrease conc of GP and TP
-conc of RuBP will increase as its still being formed from TP but not used to fix CO2