Here is a sketch. All of the following processes produce this molecule EXCEPT the (A) Calvin cyc

step 1 Here we have a picture of a molecule, and we have to say which of these processes does not produ

Here is a sketch. All of the following processes produce...

Key Concepts

ATP Production

ATP (adenosine triphosphate) is the universal energy currency of the cell, synthesized through various pathways in both cellular respiration and photosynthesis. Its production involves processes like substrate-level phosphorylation and chemiosmosis, where a proton gradient is used to drive ATP synthase activity.

Glycolysis

Glycolysis is the metabolic pathway that breaks down glucose into pyruvate, yielding a net gain of ATP along with NADH. It occurs in the cytosol and is one of the primary ways cells extract energy from glucose, serving as the entry point for further metabolic processes.

Krebs Cycle

The Krebs cycle, also known as the citric acid cycle, is a series of enzyme-catalyzed reactions in the mitochondria that oxidizes acetyl-CoA to produce high-energy electron carriers (NADH and FADH2) and a small amount of ATP (or GTP). This cycle is central to cellular respiration and links to the electron transport chain.

Electron Transport Chain

The electron transport chain is a series of protein complexes located in the inner mitochondrial membrane (or thylakoid membrane in chloroplasts during photosynthesis) where electrons from NADH and FADH2 are transferred through redox reactions. The energy released pumps protons across the membrane, creating a gradient that drives the production of ATP via oxidative phosphorylation.

Light-dependent Reactions

The light-dependent reactions are the stage of photosynthesis that convert light energy into chemical energy in the form of ATP and NADPH. This process occurs in the thylakoid membranes of chloroplasts and involves the absorption of light by pigments, the generation of a proton gradient, and the use of photophosphorylation to synthesize ATP.

Calvin Cycle

The Calvin cycle is the set of light-independent reactions in photosynthesis that occurs in the stroma of chloroplasts. Unlike other processes that produce ATP, the Calvin cycle consumes ATP (and NADPH) to fix atmospheric carbon dioxide into organic molecules such as sugars, making it a carbon assimilation pathway rather than an ATP-producing one.

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