The reactions of the Calvin cycle take place within the stromaand do not require sunlight. 1. Which substance from the light-dependent reactions of photosynthesis is a source of energy for the Calvin Cycle? On the other hand, light-dependent reactions take place through the involvement of photosystems. “Calvin cycle or C3 cycle is defined as a set of chemical reactions performed by the plants to reduce carbon dioxide and other compounds into glucose.” What is Calvin Cycle? Every living thing on Earth depends on the Calvin cycle. In plants, carbon dioxide (CO 2) enters the leaves through stomata, where it diffuses over short distances through intercellular spaces until it reaches the mesophyll cells.Once in the mesophyll cells, CO 2 diffuses into the stroma of the chloroplast, the site of light-independent reactions of photosynthesis. It combines ribulose bisphosphate with CO2 to from an unstable 6 carbon molecule. Played 444 times. The dark reaction takes place in the stroma of chloroplast. 78% average accuracy. These reactions actually have several names associated with them. The Calvin cycle reactions (Figure 2) can be organized into three basic stages: fixation, reduction, and regeneration. 1. The Calvin cycle is a series of reactions which takes place in the stroma of chloroplasts in a plant cell. The Calvin cycle is a process that plants and algae use to turn carbon dioxide from the air into sugar, the food autotrophs need to grow. The Calvin cycle begins with the intake of atmospheric CO. 2, to be combined with RuBP, forming the first in a series of metabolites that will eventually yield G3P. Edit. The Calvin Cycle includes: carbon dioxide fixation, carbon dioxide reduction, and regeneration of RuBP. It is the most abundant enzyme in the world. 2. Calvin Cycle DRAFT. The Calvin cycle, Calvin–Benson–Bassham (CBB) cycle, reductive pentose phosphate cycle (RPP cycle) or C3 cycle is a series of biochemical redox reactions that take place in the stroma of chloroplast in photosynthetic organisms.. Enzymes. Plants depend on the Calvin cycle for energy and food.Other organisms, including herbivores, also depend on it indirectly because they depend on plants for food. The Calvin Cycle. Thus, it takes place in the thylakoid membranes of the chloroplast. by arreis018. Meaning of Calvin Cycle: Like the photosynthetic reactions which are driven by the light energy the reactions which joint hydrogen and CO 2 to produce carbohydrate also require energy and the main source of this energy is the assimilatory power (ATP + NADPH 2) regenerated in photolysis. 3 years ago. Each time the Calvin cycle is The Calvin Cycle is a series of reactions producing carbohydrates. Calvin cycle is also known as the C3 cycle or light-independent or dark reaction of photosynthesis. Accordingly, light-independent reactions are also called the Calvin cycle. The relatively stable compound that is formed in this cycle is a 3-carbon sugar. In this article we will discuss about:- 1. 3. The cycle is named for Melvin Calvin who used a radioactive isotope of carbon to trace the reactions. This is the first step in the Calvin cycle. arreis018. Biology. Enzyme responsible for CO2 fixation. Features of Calvin Cycle 3. 444 times. In contrast, the Calvin cycle takes place via the formation of organic compounds. The carbon dioxide taken up by the plant cell is reduced to glucose with the help of ATP and NADPH which is formed in the dark reaction of photosynthesis. Edit. Save. 10th - 11th grade. In the stroma, in addition to CO 2, two other chemicals are present to initiate the Calvin cycle: an enzyme abbreviated RuBisCO, and the molecule ribulose bisphosphate (RuBP). Calvin Cycle DRAFT. 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