10.5 photosynthesis is an integral part of plant metabolism

Question 1

Link Between Photosynthesis and Respiration

Answer 1

• The Calvin cycle connects photosynthesis and respiration by producing G3P, a molecule used in both processes.

Question 2

Partitioning of G3P

Answer 2

• G3P generated in the Calvin cycle can be partitioned.
• Some enters glycolysis and cellular respiration.
• Some undergoes gluconeogenesis to produce glucose.

Question 3

Energy Source for Life

Answer 3

• Photosynthesis is the primary source of energy for life on Earth.
• However, only about 5% of sunlight energy is transformed into energy stored in chemical bonds during photosynthesis.

Question 4

Sunlight Energy Efficiency

Answer 4

• Despite its importance, photosynthesis is relatively inefficient in converting sunlight energy.
• Only about 5% of sunlight energy is utilized to form chemical bonds during photosynthesis.