How does photosynthesis affect carbon flow?

During photosynthesis, plants absorb carbon dioxide and sunlight to create fuel(glucose and other sugars)for building plant structures. This process forms the foundation of the fast (biological) carbon cycle.

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.