4. How will you trace the energy changes in photosynthesis?
a. chemical energy-energy of flowing electrons-light energy
b. chemical energy-light energy-energy of flowing electrons.
c. light energy-energy of flowing electrons-chemical energy, d. light energy-chemical energy-energy of flowing electrons

5. Where does light-independent reactions (Calvin cycle) take place in the chloroplast? a. Thylakoid
b. grana.
C. Stroma
d. Stomata

6. These are needed by plants in such a way that it will grow under normal condition. a. Presence of CO2, light and water.
c. Presence of oxygen, water and light
b. Presence of glucose, water and CO2. d. Presence of water, light and oxygen

7. Which of the following environmental conditions would likely increase the rate of photosynthesis?
a. increase in light intensity
b. increase in oxygen concentration
c. increase in nitrogen concentration
d. increase in carbon dioxide concentration

8. In the Calvin cycle, how the glucose molecules are formed?
a. From the combination of light energy, water and NADPH.
b. From the combination of ATP, NADPH and CO2.
c. From water, oxygen and CO2.
d. From the combination of water, sunlight and ATP.

9. Why plants are those organisms that can perform photosynthesis and not animals? a. Plants are multicellular and eukaryotic organisms.
b. Plants evolved earlier than animals.
c. Plants contain chlorophyll in their cells.
d. Plants are found at the bottom of the food chain.

10 . which of the following raw materials from the environment goes into the dark reaction ?
a . water
b . sugar
c . carbon dioxide
d . atp and nadph​