Give a brief account of enzymes as biological catalysts

enzymes speed up a reaction but aren't used up during the reaction

Explanation:

a catalyst speeds up a reaction by lowering the amount of energy it takes for the reaction to occur enzymes are described as biological catalysts because they speed up the reaction without being used in the reaction

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.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.