Question

What is the purpose of the dark tube?

measure the activity of the dark reaction of the Calvin cycle

determine if plants can perform photosynthesis in the dark

account for the incidental reaction of DCIP

Answer 1

The purpose of the dark reactions is to take the Chergy from ATP and energized electrons and hydrogen lone from NADPH and add them to con to make glucose or sugar. The dark reactions occur in the part of the chloroplast known as the stroma. The Calvin cycle is also called dark reactions or light independent reactions because it is the part that does not need energy from the sun to happen. During the dark reaction of photosynthesis the plant uses carbon dioxide with the ATP ana NADPH from the light dependent reactions to produce glucose. Phases of Dark reactions T13 Carbon fixation - The (o taken in by the plant combines a 5 carbon compound known as ribulose 4,5 biphosphate to from molecules of 3- phosphogly- - create (3 PGA). This step is catalyzed by the enzyme ribulose biphosphate carboxylase or RUBISCO CRUPP). (2] Carbon reduction - - In this phase, I PGA uses 6 ATP molecules to from an isomer of JPGA called as 1,9 phosphoglycorate. In the next Step 6 NAPPH to from glyceride 3 phosphate.

[3] RuBP regeneration This step responsibility is to regenerate the Rube which is what the reaction began with. At the same time, it also synthesizes glucose which is stored as food. Clyceride-3- phosphate uses 3 ATP molecules to Convert into ribylose a 1,5-biphosphate which enters a new cycle of dark reaction by combining with the incoming con Photosynthesis stops at night due to the lack of sunlight. A pland's photosynthesis requires sunlight and co2 which gets processed in to energy for itself. At night it infact does the opposite process and takes in O2 and emits con because storing co2 at night harms the plant, so the plant releases it. Depip has a higher ferredoxin and the chain can reduce for NAPPT, that electron carrier affinity for electrons then photosynthetic electron tranport DC PIP as a substitute is normally the final in photosynthesis.