1what is an advantage of increasing the catalytic rate of en

1)what is an advantage of increasing the catalytic rate of enzymes in cold environment?

A. there is a high metabolic cost to maintaining a high Kcat

b. the binding ratio doesn\'t matter

c. there is a high metabolic cost to producing more enzymes

2) the major role of brown fat is to?

a. warm the body by non shivering mechanisms

b. serve as a cushion for organs to allow newborns to withstand harsh treatment

c. provide an energy source for muscle movement by soaring lots of triglycerides

3) Enzyme substrate affinity___

a. is greatest at highest and lowest temperatures

b. generally decreases with temperature

c. does not vary with temperature

Solution

2) the major role of brown fat is to?

a. warm the body by non shivering mechanisms

brown fat cells are abundant in newborn humans and in hibernating animals. Brown fat cells are packed with mitochondria that leak part of their H+ gradient futilely back across the membrane for the sole purpose of warming up the organism.

(3) b. generally decreases with temperature

Enzyme substrate affinity depends on temperature, the nature of the substrate, pH, ionic strength, and other reaction conditions.  Increased temperature decreased the affinity