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

1. Amino acid

2. Catalyst

3. DNA

4. Enzymes

5. Nucleic acid

6. Protein

7. RNA

8. Substrate

Explanation:

1. AMINO ACIDS are the basic building block of proteins; they contain a carboxyl group (-COOH) and an amino group (-NH 2) in their structure.

2. A CATALYST is any substance that accelerates a chemical reaction without being used up in the reaction. They do this by lowering the activation energy of the reaction.

3. Deoxyribose nucleic acid (DNA) is a complex molecule containing the genetic code. It carries all the genetic information of living organisms.

4. AN ENZYME is a protein molecule that is specialized to speed up a specific chemical reaction in biological systems. It is referred to as a biological catalyst because it speeds up a chemical reaction in living systems.

5. NUCLEIC ACID is a sequence of sugars, phosphates, and nitrogenous organic bases. A nucleic acid (DNA and RNA) is a polymer of nucleotides, which are composed of the three molecules mentioned above. A sequence of nucleotides forms a NUCLEIC ACID.

6. PROTEIN is a large, complex organic molecule consisting of a large number of amino acids linked together by peptide bonds. The amino acid building blocks are linked together in a condensation reaction and catalyzed by Peptidyl transferase enzyme.

7. Ribonucleic acid (RNA) is a type of nucleic acid that participates in the synthesis of proteins. RNA is of three types viz: mRNA, rRNA and tRNA. They all play a role in the process of protein synthesis.

8. A SUBSTRATE is a compound that is involved in a chemical reaction and is chemically changed by the reaction. The substrate usually forms part of the reactant that yields the product.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.