What Process Is Described Here? a Concentration Gradient of H

question 39

Multiple Choice

What process is described here? A concentration gradient of H+ ions is created in the periplasmic space by actively transporting the ions across the membrane using the energy liberated when carrier molecules are oxidized. When the H+ ions pass through ATPase, enough energy is generated to add phosphate groups onto ADP molecules.

• A) Fermentation
• B) The Calvin cycle
• C) Substrate-level phosphorylation
• D) Oxidative phosphorylation
• E) Deamination

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Definitions:

Isomaltose

A disaccharide consisting of two glucose molecules linked together, often produced during the digestion of starch.

Secretin

Secretin is a hormone produced by the S cells of the duodenum that stimulates the pancreas to release bicarbonate-rich fluids, aiding in the neutralization of stomach acid in the small intestine.

Small Intestine

A part of the gastrointestinal tract between the stomach and the large intestine that is responsible for most of the digestion and absorption of nutrients.

Cholecystokinin

A hormone released by the small intestine in response to the ingestion of fats, playing a critical role in digestion by stimulating the gallbladder to release bile.