Consider the two-step metabolic pathway: a—(enzyme 1)—> b—(enzyme 2)—> c how would inactivating enzyme 1 affect the concentrations of molecules a, b, and c relative to what they would be if the pathway were fully functional? see section 8.5 (page 185) .

Answer;

D. A would increase; B and C would decrease

Explanation;

-Enzymes can be regulated by other molecules that either increase or reduce their activity. Molecules that increase the activity of an enzyme are called activators, while molecules that decrease the activity of an enzyme are called inhibitors.

-Inactivating enzyme 1 mean that the concentrations of molecules A would increase because enzymes is not acting on it to produce product B, which is the substrate for enzyme 2, thus both B and C would decrease relative to what they would be if the pathway were fully functional.

answer; (phospholipid);

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.