1. the basic building block of proteins; contains a carboxyl group (-cooh) and an amino group (-nh2) nucleic acid 2. any substance that accelerates a chemical reaction without being used up in the reaction dna (deoxyribonucleic acid) 3. a complex molecule containing the genetic code rna (ribonucleic acid) 4. a protein molecule that is specialized to speed up a specific chemical reaction in biological systems enzyme 5. a sequence of sugars, phosphates, and nitrogenous organic bases—dna and rna amino acid 6. a large, complex organic molecule consisting of a large number of amino acids linked together by peptide bonds protein 7. a nucleic acid that participates in the synthesis of proteins catalyst 8. a compound that is involved in a chemical reaction and is chemically changed by the reaction substrate

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.