Concept explainers
To determine: Whether C3, C4, and CAM plants all have rubisco.
Introduction: Botanists use C3, C4, and CAM (Crassulacean acid
To determine: Whether C3, C4, and CAM plants all have PEP carboxylase enzyme.
Introduction: Botanists use C3, C4, and CAM (Crassulacean acid metabolism) as a method to classify Earth’s plants into different categories; this classification refers to the number of first carbon compounds to which the CO2 is fixed. The majority of land plants use the C3 pathway. In higher plants, certain respiratory processes take place where the plants uptake oxygen in the presence of sunlight and releases the CO2 into the atmosphere. This process is entirely different from the photosynthesis process.
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Biology (MindTap Course List)
- It is the term referring to the characteristic leaf structure of C4 plants that enables them to outperform C3 plants in an environment that has high O2 concentration and/or temperature. Unlike C3 and CAM plants, C4 plants, such as corn and sugarcane, have leaves with vascular bundles that are surrounded by a chloroplast-rich vascular bundle sheath, which is further surrounded by the spongy mesophyll.arrow_forwardMatch the -troph term with the correct definition. (match each letter to the corresponding number) Each term applies to only 1 definition. A.chemotroph B. phototroph C. heterotroph D.heliotroph E. autotroph -------------------------------- 1.gets energy from chemical bonds 2.gets carbon from inorganic sources (carbon dioxide) 3.gets carbon from organic sources (other organisms) 4.gets energy from lightarrow_forwardWhat is so special about thylakoid membranes (and chloroplasts in general) that allow it to be the site for photosynthetic activity in plants?arrow_forward
- In C3 plants, high concentrations of oxygen inhibit photosynthesis. Why is this so?arrow_forwardEven though C4 plants require more ATP per CO₂ fixed, at higher temperatures, they are more efficient than C3 plants. Which of the following explains the effectiveness of C4 plants? contains a mutant form of Rubisco that does not bind to oxygen oxygen is prevented from entering the bundle-sheath cells where Rubisco is found Oduring the night, carbon dioxide is stored as malate so that stomata do not need to open during the day O photorespiration in C4 plants produces energy while in C3 plants, energy is consumedarrow_forwardWhy are some plants called C4 plants and why are they important? How have they adapted to unfavorable climatic conditions? How do the activities of C4 plants compare with the activities of CAM plants?arrow_forward
- All plants contain chlorophyll a. In addition, many plants contain other types of chlorophylls and accessory pigments. Suppose a new agricultural technology is developed in which accessory pigments are somehow embedded or injected into crops that naturally have only chlorophyll a. Explain the food production advantage that these plants could hypothetically provide if they could utilize many of these pigments rather than just one type of chlorophyllarrow_forwardwhat is the role of ascorbic acid in photosynthesis of fruits and vegetables?arrow_forwardIf corn, a C4 plant, is exposed to 14CO2, in what moleculewill it initially appear? Indicate the portion of the moleculein which the label will be found.arrow_forward
- Which of the following is the source of the carbon in sugar produced during photo-synthesis? CO2 H2O Rubisco PEP carboxylasearrow_forwardC4 plants have higher photosynthetic rates than C3 plants because they have an additional CO2-fixing enzyme located in the bundle sheath cells.arrow_forwardAgricultural biotechnologists have developed genetically modified tomato plants in which ethylene production is blocked. Why might such a plant be valuable to tomato growers?arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning