What is the benefit of substrate channeling? the pdh active site forms in the hydrophobic core of the complex instead of a surface‑exposed region. reaction intermediates move to sequential active sites faster than the diffusion constant. every intermediate or product made by the pdh complex enters the citric acid cycle as a substrate. the pdh complex sequesters excess substrate to use at later time. intermediates of a multistep reaction sequence do not dissociate from the enzyme complex.

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.