Why is it a problem that rubisco engages in photorespiration?Group of answer choicesBecause it wastes H+ that could be used by the light reactions to make ATPBecause it wastes energy that could be used to make glucoseThis is not a problem for plant cells, it is necessary for their survivalBecause it causes the mitochondria in plant cells to photosynthesiseBecause it prevents photosystems from absorbing light

Why is photorespiration wasteful? BecauseGroup of answer choicesOrganic carbon is converted into CO2 without the production of ATPOrganic carbon is converted into CO2 without the production of ATP and NADPHOrganic carbon is converted into CO2 without the production of ATP, NADPH or another energy-rich metaboliteOxygen is consumed and CO2 is releasedGlycolate is formed instead of CO2

QUIZ – What is rubisco?1. QuestionWhich of the following is true of Rubisco? (select all that apply) Rubisco is located in the thylakoids Rubisco is located in the stroma Rubisco is located in the intermembrane space Rubisco participates in the light-dependent reactions Rubisco participates in the light-independent reactions2. QuestionWhich of the following are substrates of Rubisco? (select all that apply) 3PG CO2 O2 RuBP3. QuestionWhen does photorespiration occur? When Rubisco adds oxygen onto RuBP When Rubisco fixes carbon dioxide When 3PG is produced When NADPH and ATP are consumed4. QuestionWhy is Rubisco considered an inefficient enzyme? (select all that apply) Chloroplasts contain a limited amount of the enzyme It fixes only a few carbon dioxide molecules per second When carbon dioxide is limiting, it fixes oxygen instead The enzyme denatures at high temperature

The energy for producing organic molecules in plants is directly driven byMultiple Choicethe use of rubisco to collect energy from ATP made during the light reactions.the use of chlorophyll to transfer electrons from photons to other pigments.the use of NADPH to carry photons to the Calvin cycle.the use of water to transfer the energy of hydrolysis to enzymes.the use of light to provide electrons for oxidation and reduction reactions.

Let’s look at photosynthesis and cellular respiration. Which of the following statements correctlycompares the light reactions of photosynthesis and oxidative phosphorylation of respiration?1. With both, adding an uncoupler would prevent the formation of ATP.2. Unlike respiration, electron flow from each carrier to the next in photosynthesis requires light.3. In both, the protein complexes involved in electron transport require post-translationalprocessing to become functional.4. With both, the final product of electron transport is an energy-rich metabolite.A. 1, 2 and 3B. 1 and 3C. 2 and 4D. 4 onlyE. All of 1, 2, 3 and 4 are corre

Under which conditions will plant cell mitochondria actively oxidise pyruvate and carry out oxidative phosphorylation?Question 19Select one:a.in all cells, with or without lightb.only in cells that store glucose in the form of starch and only in the darkc.only in photosynthetic cells in the light, while photosynthesis occurs concurrentlyd.in photosynthesising cells in the light, and in other cells in the dark