Introduction to Photosynthesis

The main product of photosynthesis is:

a) Glucose.

b) Oxygen.

c) Carbon dioxide.

d) Water.

e) Sunlight.

Which of the following reactants is reduced during the process of photosynthesis?

a) Oxygen gas.

b) Photons of light.

c) Carbon Dioxide.

d) Water.

Energy used to power photosynthesis & ultimately cellular respiration originates from which energy source?

a) Glucose.

b) ATP.

c) Carbon dioxide.

d) The sun.

A gelatinous matrix inside the chloroplast containing ribosomes, DNA and enzymes is the:

a) Granum.

b) Chlorophyll.

c) Thylakoid.

d) Stroma.

e) Mitochondria.

Which plant structure is responsible for a plant’s gas exchange with the atmosphere?

a) Chloroplast.

b) Stomata.

c) Mesophyll.

d) Stroma.

The component of the electromagnetic spectrum that allows our eyes to visualize color is:

a) X-rays.

b) Gamma rays.

c) Ultraviolet light (UV).

d) Visible light.

e) Infrared light.

A photon is an example of _________ energy. Photons have ________ energy at short wavelengths and _________ energy at long wavelengths.

a) kinetic; high; low.

b) kinetic; low; high.

c) potential; high; low.

d) potential; low; high.

Examples of accessory pigments for photosynthesis are:

a) Chlorophyll b and carotenoids.

b) Chlorophyll a and chlorophyll b.

c) Chlorophyll a and carotenoids.

d) Carotenoids, chlorophyll b and chlorophyll a.

Which of the following pigments does NOT absorb yellow/orange light (650-750nm)?

a) Chlorophyll a.

b) Carotenoids.

c) Chlorophyll b.

d)  Both a & c.

Based on the map above, the step of photosynthesis that generates glucose sugar is…  

a) the Calvin cycle.

b) the light reactions.

c) C3 photorespiration.

d) C4 photorespiration.

Describe the primary function of the light reactions of photosynthesis.

a) Production of NADPH used in cellular respiration.

b) Use of ATP to make glucose.

c) Conversion of chemical energy to light energy.

d) Production of ATP and NADPH.

Where do the electrons that are excited in photosystem II come from?

a) CO₂.

b) O₂.   

c) Glucose.   

d) Photosystem I.   

e) Water.

During the light reactions, photosystem I functions to_________, and photosystem II functions to __________.

a) Reduce CO₂; oxidize NADPH.

b) Synthesize ATP; Produce O₂.

c) Produce O₂; oxidize NADPH.

d) Reduce NADP⁺; oxidize H₂O.

What is the correct order of steps of the light reactions of Photosynthesis?

a) photosystem I, ETC, photosystem II, NADP⁺ reduction, chemiosmosis.

b) photosystem I, photosystem II, ETC, NADP⁺ reduction, chemiosmosis.

c) photosystem II, ETC, photosystem I, NADP⁺ reduction, chemiosmosis.

d) photosystem II, photosystem I, ETC, NADP⁺ reduction, chemiosmosis.

Where in a plant cell does the Calvin cycle take place?

The enzyme rubisco combines RuBP with a carbon atom from:

Which of the following processes occurs during the Calvin cycle?

Plants are more likely to use Photorespiration instead of the Calvin Cycle when:

A plant that opens its stomata only at night is a

All of these are similarities between the light reactions in photosynthesis and the electron transport chain/chemiosmosis in cellular respiration EXCEPT which of these answers?