Question

remaining time: 05 minutes, 15 seconds.
question completion status:
the o2 gas produced during photosynthesis is derived from
a. co2
b. co
c. glucose.
d. water.
question 4
chlorophyll, the pigment responsible for interacting with photons, absorbs __ and reflects __ light.
a. red and blue; blue
b. red and blue; green
c. green and blue; green
d. green; green
question 5
when a photon is absorbed by a molecule, the photon
a. raises the molecule from a ground state of low energy to an excited state.
b. causes a change in the velocity of the wavelengths.
c. affects the molecule in ways that are not clearly understood.
d. loses its ability to generate any energy.
question 6
considering only the light reactions of photosynthesis, inputs are __ and the outputs are __
a. (in) energy, o2, water, (out) co2, atp, nadph.
b. (in) energy, water, (out) o2, atp and nadph
c. (in) atp, water, co2; (out) o2, sugar
d. (in) water, co2 and energy; (out) o2 and sugar.

Explanation:

• For the first question, during photosynthesis, water is split in the light - dependent reactions to produce oxygen. So the oxygen gas comes from water.
• For the second question, chlorophyll absorbs red and blue light and reflects green light, which is why plants appear green.
• For the third question, when a photon is absorbed by a molecule, it raises the molecule from a ground state of low energy to an excited state.
• For the fourth question, in the light reactions of photosynthesis, the inputs are light energy and water, and the outputs are oxygen, ATP, and NADPH.

Answer:

• Question 3: D. water
• Question 4: B. red and blue; green
• Question 5: A. raises the molecule from a ground state of low energy to an excited state
• Question 6: B. (in) energy, water; (out) O2, ATP and NADPH