The diagram summarizes the steps of photosynthesis inside chloroplasts. If the plant cell the chloroplast is in does not receive enough sunlight, which event will happen first?A.An increase in the rate of the Calvin cycleB.A decrease in the rate of the Calvin cycleC.A decrease in the production of ATPD.An increase in the production of ATP
Question
The diagram summarizes the steps of photosynthesis inside chloroplasts. If the plant cell the chloroplast is in does not receive enough sunlight, which event will happen first?A.An increase in the rate of the Calvin cycleB.A decrease in the rate of the Calvin cycleC.A decrease in the production of ATPD.An increase in the production of ATP
Solution
The first event that will happen if the plant cell the chloroplast is in does not receive enough sunlight is C. A decrease in the production of ATP.
Here's why:
Photosynthesis is a process that converts light energy, usually from the Sun, into chemical energy that can be later released to fuel the organisms' activities. This process occurs in two stages: the light-dependent reactions and the light-independent reactions (Calvin Cycle).
The light-dependent reactions occur in the thylakoid membranes of the chloroplasts where they capture light energy to produce ATP and NADPH. These are then used in the Calvin cycle to fix carbon dioxide into three-carbon sugars.
If the plant cell does not receive enough sunlight, the light-dependent reactions cannot occur at a normal rate because there's not enough light energy to convert into chemical energy (ATP and NADPH). As a result, the production of ATP decreases first. This decrease in ATP production then leads to a decrease in the rate of the Calvin cycle because ATP is needed for the Calvin cycle to occur.
Similar Questions
Photosynthesis is a highly complex process that occurs in plants and photosynthetic bacteria. The site of photosynthesis is the chloroplast, shown below. Photosynthesis is divided into two main parts: the light-dependent reactions and the light-independent reactions (the Calvin Cycle).Chloroplast Diagram by Kelvin Ma (CC BY 3.0)Which of the following statements BEST describes the interactions between the light-independent and light-dependent reactions?Elimination ToolSelect one answerAThe light-dependent and light-independent reactions do not interact.BThe light-dependent and light-independent reactions produce the same products at different times.CThe light-dependent reactions rely on the light-independent reactions for ATP and NADPH.DThe light-independent reactions rely on the light-dependent reactions for ATP and NADPH.
Which statement is TRUE about Calvin cycle?*1 pointOccurs in thylakoid membrane.Require ATP and NADPH.Use sugar to produce CO2.Involves photosystem I and photosystem II
Enumerate the events involved in photosynthesis
Which of the following accurately describes the role of the Calvin cycle in photosynthesis?Question 8Answera.The Calvin cycle releases oxygen as a byproduct of carbon fixation.b.The Calvin cycle uses light energy to produce ATP and NADPH.c.The Calvin cycle converts carbon dioxide into glucose using ATP and NADPH.d.The Calvin cycle takes place in the thylakoid membrane and is responsible for splitting water molecules.
Which of the following events does not occur during photosynthesis?Only one correct answerA.Splitting of water molecules into hydrogen and oxygenB.Oxidation of carbon dioxide to carbohydratesC.Conversion of light energy to chemical energyD.Absorption of light energy by chlorophyll
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