Photosynthesis

Question 1

Photosynthesis chemical equation

Answer 1

6CO2 + 6H2O → C6H12O6 + 6O2

Question 2

Photosynthesis

Answer 2

• Plants require chlorophyll for photosynthesis.
• There is a high concentration of chloroplasts in leaves, with more chloroplasts in the upper palisade layer (palisade mesophyll).
• Plants from low -light habitats e.g. Ferns have a higher concentration of chloroplasts.

Question 3

Chlorophyll

Answer 3

1.Chlorophyll molecules are pigments found in photosynthetic organisms.
2. These molecules trap or absorb light energy.
3. When light energy is absorbed it is transferred to electrons.
4. These electrons become energised or “ excited”.
5. The energy from the excited electrons is used to generate ATP.

Question 4

Chloroplast structure

Answer 4

1. Chlorophyll molecules present on the inner membranes (grana).
2. This is where the light dependent stage occurs.
3. The liquid phase (stroma) of a chloroplast is where the light independent stage occurs.
4. Small DNA molecule present in each chloroplast to code for the proteins necessary for photosynthesis reactions.