Which of the following represents a correct sequence in non-cyclic photophosphorylation? a. photosystem I -> ATP production -> photosystem II -> NADPH production       b. photosystem II -> ATP production -> photosystem I -> NADPH production       c. photosystem I -> NADPH production -> photosystem II -> ATP production       d. photosystem II -> NADPH production -> photosystem I -> ATP production

Every kid from Grade 4 onwards knows that photosynthesis involves light.    Remind me, what do photons of light specifically do in photosynthesis?        A.  They remove electrons from H2O, releasing oxygen into the atmosphere.  B.  They reduce P680+ to P680.  C.  They convert carbon dioxide into a carbohydrate (glucose)   D.  They make chlorophyll easier to oxidize.

A botanist brings you a plant that she has collected during her travels and asks you to determine the photosynthetic pathway the plant uses. You grow the plant in a special chamber on a 14:10-hour light/dark cycle and track the fate of radiolabeled CO2 in the plant over 24 hours. You begin monitoring the plant's photosynthetic activity at the beginning of the light portion of the cycle. You find that during the day, the plant's stomata remain closed, and an enzyme with a low affinity for CO2 slowly catalyzes the joining of CO2 and a five-carbon molecule in the plant's mesophyll cells. Once the chamber switches to the night cycle, the plant stomata open, and an enzyme with a high affinity for CO2 slowly catalyzes the joining of CO2 to a three-carbon molecule to produce a four-carbon molecule in the mesophyll cells. What photosynthetic pathway(s) does this plant use? Group of answer choices C4 Photorespiration CAM C3

In C3 plants CO2 is first incorporated into __________, whereas in C4 and CAM plants the CO2 is first incorporated into __________, and subsequently put into the Calvin cycle by Rubisco. a. 3-phosphoglycerate; oxaloacetate b. dihydroxyacetone phosphate; malate c. 3-phosphoglycerate; malate d. glyceraldehyde-3- phosphate; erythrose-4-phosphate

Which of the following lists the stages of the Calvin cycle in order, starting with the stage where carbon dioxide is added? PGAL synthesis → carbon fixation → light reactions → regeneration of RuBP carbon fixation → PGAL synthesis → regeneration of RuBP regeneration of RuBP → carbon fixation → PGAL synthesis photorespiration → PGAL synthesis → regeneration of RuBP → carbon fixation

Explain briefly why the following ideas are false. a. Photosynthesis is the food-making process done by plants. b The Calvin cycle was called the dark reactions because it can only take place in the absence of light. c. Photosynthesis can only be powered by sunlight.

Your friend is looking for advice for growing healthy houseplants. With what you read in the textbook about photosynthesis, provide your friend with three specific factors that are key to successful plant growth. Provide specific details as to why you chose these factors and how your friend can make sure the plants are able to maximize their photosynthetic rate.

A mutant form of an Arabidopsis thaliana plant has defective chlorophyll production, such that the abundance of chlorophyll molecules in chloroplasts is 5% the normal level, and the chlorophyll molecules are on average too far apart for resonance energy transfer to occur. What will be the effect on the overall efficiency of photosynthesis in the plant? Rationalize your answer

Which of the following is true of light-independent reactions of photosynthesis? Select all that apply. a. Light-independent reactions occur in the stroma. b. Water molecules are split during light-independent reactions. c. Chlorophyll absorbs energy from sunlight. d. Carbon dioxide is necessary for light-independent reactions.

Photorespiration causes a number of impacts on a plant.  Which of these drives the ECOLOGICAL difference between C3 and C4 plants   Question 4 options:   Rubisco mistakes Oxygen for CO2   The plant uses energy to convert the toxic product of photorespiration back into something less harmful   The plant needs a large number of enzymes to be able to regain the energy invested in the 2 carbon molecule produced by photorespiration   None of these explain the difference   The plant needs to do gas exchange to remove oxygen and add CO2 to the cell doing photosynthesis to avoid photorespiration.