To start the transcription process, a large molecule, , recognizes a . a. RNA polymerase; messenger RNA b. DNA polymerase; termination site c. DNA polymerase; promoter site d. RNA polymerase; promoter site e. DNA polymerase; messenger RNA.

answer; ///(b) it is composed of four protein chains and four heme groups;

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.

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