Question

1. click on the calvin cycle a. what is phase 1? i. a five carbon sugar is bound to a molecule of carbon dioxide (co₂) by the enzyme, rut ii. this forms 2 molecules of 3 - phosphoglycerate b. what is phase 2? i. each molecule of 3 - phosphoglycerate is reduced to form g3p which requires energy fr and electrons from. ii. 2 molecules of g3p leave the calvin cycle, to form c. what is phase 3? i. the other 5 g3p molecules are used to regenerate rubp so that the can continue. ii. these reactions require energy to occur. this comes from atp produced from the 7. quiz! (not in the same order as the interactive site quiz) a. which part of the plant cell performs photosynthesis? i. mitochondrion ii. nucleus iii. cell wall iv. chloroplast b. what does light do when it strikes the chlorophyll molecules of photosystems i and ii? i. light causes glucose to be synthesized directly inside the chlorophyll molecules of the photosystems.

Explanation:

a. The first phase of the Calvin - cycle is carbon fixation. A five - carbon sugar (RuBP) binds to CO₂ by the enzyme Rubisco, forming 2 molecules of 3 - phosphoglycerate.
b. Phase 2 is reduction. Each 3 - phosphoglycerate is reduced to form G3P, requiring energy from ATP and electrons from NADPH. Two G3P molecules leave the cycle to form glucose.
c. Phase 3 is regeneration. Five G3P molecules are used to regenerate RuBP so that the Calvin cycle can continue. The energy for these reactions comes from ATP produced from the light - dependent reactions.
For the quiz:
a. Chloroplasts are the organelles in plant cells that perform photosynthesis. Mitochondria are for cellular respiration, the nucleus contains genetic material, and the cell wall provides structure and protection.
b. When light strikes the chlorophyll molecules of photosystems I and II, it excites electrons, starting the process of the light - dependent reactions, not directly synthesizing glucose.

Answer:

a. Phase 1: Carbon Fixation
b. Phase 2: Reduction; ATP; NADPH; glucose
c. Phase 3: Regeneration; Calvin cycle; light - dependent reactions

1. a. iv. Chloroplast

b. Light excites electrons in chlorophyll (none of the given options in b are correct as stated)