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In the process of photosynthesis, plants take in carbon dioxide and water from the soil and air droplets. In return, they release oxygen by breaking down water and stores glucose as their energy by fixing the carbon dioxide.
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- Rubisco can bind with CO2 or 02. When it binds with O2, it "wastes" some of the energy captured from the sun. This reaction is photorespiration and is favored at high temperatures and low CO2:02 ratios. Which of the following strategies should limit photorespiration (select all that apply). Keep stomata closed. Keep stomata open. Physically separate the light and light-independent reactions. Temporally separate CO2 uptake and fixation.What are potential outcomes when a plant's stomata close in response to heat and water stress? Select all that apply. CO2 and O2 may compete for the active site of rubisco. Photorespiration is more likely to occur. Photosynthesis is more efficient. Gas exchange comes to a halt.If a C3 plant that normally closes its stomata during hot, dry conditions were triggered to open them instead, the most likely outcome would be that O water leaves the leaf, decreasing the rate of photosynthesis O glucose leaves the leaf, increasing the rate of photosynthesis O CO₂ enters the leaf, decreasing the rate of photosynthesis O O₂ enters the leaf, increasing the rate of photosynthesis more chlorophyll is made, increasing the rate of photosynthesis
- Which of the following statements about the challenges of C3 photosynthesis under hot conditions is TRUE? O When they close stomatal cells, they save water but lose too much O2. O Rubisco has a higher affinity for CO2, making the rate of photosynthesis too rapid. When stomatal cells close, photorespiration increases and CO2 is lost. C3 plants have to spend energy to store carbon in a separate specialized cell.The image below shows a plant that has one stem wrapped in plastic. You can see the condensation of water on the inside of the plastic bag. Which of the following best explain the processes required for the bag to accrue 1 point condensation? Water from the root to the leaves via the xylem and transpiration from the stomata O Photosynthesis from the leaves via the stomata. O Cellular respiration through the stems. Cellular division within the dermal tissue.C4 plants differ from C3 plants because C3 plants while C4 plants O gain CO2 via photorespiration; lose CO2 via photorespiration have mesophyll cells that fix CO2 and contain the Calvin cycle; have mesophyll cells that fix CO2 and bundle sheath cells that contain the Calvin cycle concentrate CO2 near rubisco; cannot concentrate CO2 near rubisco can concentrate the CO2 by regulating the stomata closure; can concentrate CO2 at night produce a four-carbon intermediate after CO2 fixation; produce a three-carbon intermediate after CO2 fixation
- Which of the following scenarios happens during the light-dependent reaction of photosynthesis? Oxygen gas is produced in the thylakoid lumen by the oxidation of water by photosystem I. Ferrodoxin and NADP+ reductase participates in the reduction of NADP+ to NADPH. Carbon dioxide enters the plants via stomata. Rubisco attaches three molecules of ribulose bisphosphate (RuBP) to one molecule of carbon dioxide.If a plant closes its stomata, what can no longer get into the leaf, that cells need to do photosynthesis? glucose water carbon dioxide oxygenWhat is the function of the stomata in photosynthesis? Oallowing gas exchange allowing water to enter the plant allowing sunlight to enter the plant allowing pollinators to locate the plant
- Which of the following is TRUE about CAM photosynthetic pathway? Compared to the C3 and C4 pathways, CAM photosynthesis results in greater transpiration and water loss. O By separating where carbon is initially fixed inside the leaf tissue, CAM plants can better control the gradient of carbon dioxide between the air and their leaves. CAM photosynthesis is more energy efficient than C3 photosynthesis. Compared to C3 and C4 photosynthetic pathways, the rate of CAM photosynthesis is limited.How do C4 plants minimize photorespiration? Multiple Choice Stomata are only opened at night, storing carbon dioxide in the stroma. During the day, the carbon dioxide is released for photosynthesis. Carbon dioxide is fixed twice in different cells. The Calvin cycle occurs in the bundle sheath cells where oxygen concentrations are lower. Carbon dioxide is fixed twice in different cells so that carbon dioxide does not come into contact with rubisco. Stomata are only opened at night, storing oxygen in malate. During the day, the oxygen is released for photosynthesis. Stomata are only opened at night, storing carbon dioxide in malate. During the day, the carbon dioxide is released for photosynthesis.In hot, dry climates, plants have evolved mechanisms to avoid photorespiration. Which of the following is FALSE Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d C3 plants have no mechanism to avoid photorespiration C4 plants reduce photorespiration by separating the light reaction in the mesophyll cells from the light- independent reaction in the bundle-sheath cells CAM plants minimize photorespiration by collecting and storing CO2 at night and keeping their stomata closed during the day C4 plants include corn, sugarcane, and many grasses CAM plants can undergo photophosphorylation in the absence of sunlight 7 Open in Readin