Energy Transfers In And Between Organisms

Question 1

Photosynthesis is a reaction in which..

Answer 1

light energy is used to produce glucose in plants

Question 2

What does photosynthesis require

Answer 2

The process requires water and carbon dioxide, with the products being glucose and oxygen.

Question 3

What are the 2 stages of photosynthesis

Answer 3

the light dependent stage and the light independent stage

Question 4

What is the rate of photosynthesis determined by

Answer 4

The rate of photosynthesis is determined by carbon dioxide concentration, light intensity and temperature

Question 5

How are chloroplasts adapted for photosynthesis

Answer 5

• Contains stacks of thylakoid membranes called grana which provides a large surface area for the attachment of chlorophyll, electrons and enzymes

• A network of proteins in the grana hold the chlorophyll in a very specific manner to absorb the maximum amount of light

• The granal membrane has ATP synthase channels embedded allowing ATP to be synthesised as well as being selectively permeable allowing the establishment of a proton gradient

• Chloroplasts contain DNA and ribosomes allowing them to synthesise proteins needed in the light dependent reaction

Question 6

Photosynthesis equation

Answer 6

6CO2 + 6H2O -> C6H12O6 + 6O2