The genetic code is always reada.3 bases at a time in the same direction. b.4 bases at a time in the same direction. c.3 bases at a time and the direction varies. d.4 bases at a time and the direction varies.

A. 3 bases at a time in the same direction

Explanation:

The genetic code refers to the rules guiding the synthesis of a protein molecule from the information enclosed in a gene. It encompasses all the 64 possible codons in living organisms. During translation where each codon is read to synthesize an amino acid, the genetic code reads three bases at a time since there are three bases in one codon.

These three bases are read at the same time in the same direction i.e. 5′→3′ direction of the mRNA molecule. This direction is referred to as the reading frame.

a

explanation:

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.