How do cells use the ATP cycle shown in the figure? Cells use the cycle to recycle ADP and phosphate. Cells use the cycle to recycle energy released by ATP hydrolysis. Cells use the cycle to recycle ADP, phosphate, and the energy released by ATP hydrolysis.
As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in one hour. You find that 30,000 molecules of ATP were consumed, but only 20,000 molecules of NADPH were consumed. What is the source of the extra ATP molecules? A. cyclic electron flow B. photosystem I C. linear electron flow D. photosystem II C
D. Most of the free energy available from the oxidation of glucose is used in the production of ATP in glycolysis. B Which of the following statements describes what happens to a molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction? A.
The ATP must first have to attach to the tRNA. The binding of the first two molecules must cause a 3-D change that opens another active site on the enzyme. The ATP must be hydrolyzed to allow the amino acid to bind to the synthetase.
How do cells use the ATP cycle illustrated in the figure? Cells use the cycle to recycle ADP and phosphate. Cells use the cycle to recycle ADP, phosphate, and the energy released by ATP hydrolysis.
ATP plays a critical role in the transport of macromolecules such as proteins and lipids into and out of the cell. The hydrolysis of ATP provides the required energy for active transport mechanisms to carry such molecules across a concentration gradient.
ATP is able to power cellular processes by transferring a phosphate group to another molecule (a process called phosphorylation). This transfer is carried out by special enzymes that couple the release of energy from ATP to cellular activities that require energy.
ATP is consumed for energy in processes including ion transport, muscle contraction, nerve impulse propagation, substrate phosphorylation, and chemical synthesis. These processes, as well as others, create a high demand for ATP.