1. What does it mean to say that CO, becomes \"fixed\" during photosynthesis? a.
ID: 209203 • Letter: 1
Question
1. What does it mean to say that CO, becomes "fixed" during photosynthesis? a. CO, becomes bonded to an organic compound. b. CO, is released during cellular respiration. c. CO, acts as an electron acceptor d. CO, acts as an electron donor. 2. Which of the following happens during the light-capturing reactions of photosynthesis? a. O, is released from breaking down CO b. Glucose is broken down into CO c. ATP is made using light energy. d. Sugars are made from CO, 2" 3. Which of the following happens during the Calvin cycle? a. Light energy is trapped from the Sun. b. Glucose is broken down into CO. c. ATP is made using light energy. d. Sugars are made from CO 4. When a photon is absorbed by a pigment molecule, a. an electron in the pigment molecule is boosted to a higher energy state b. a photon is boosted up one energy level c. the wavelength of the photon increases d. the pigment changes colorExplanation / Answer
Answer for question number 1 : The correct option is A (CO2 becomes bonded to organisc molecule)
Explanation : Atmospheric carbondioxide fixation occurs when CO2 combines with the ribulose-1,5- bisphosphate to form 3-phosphoglycerate during the calvin cycle in plants. This reaction is catalysed by abundently found enzyme in plants called RUBISCO.
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