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.

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.