Question

Which of the following is correct regarding genetic code?
A. UUU is the initiation codon which also coats phenylalanine.
B. There are 64 triplet codons and only 20 amino acids.
C. Three random nitrogen bases specify the placement of one amino acid.
D. UAA is the nonsense codon which also codes for methionine.

Answer 1

Hint: Genetic code carries genetic information in the form of a series of three-base sequences which are translated form proteins.

Step by step answer:Genetic code: Genetic code is defined as a set of rules which is used to decode the information from the living cells encoded within genetic material to translate into proteins. DNA and mRNA are the carriers of genetic information.
Codon: It is a sequence of three nucleotides which together form a unit of genetic code in the chromosomes. Codon specifically codes for a particular amino acid in a protein and is used in initiation or termination of protein synthesis. It is also called a triplet.
Amino acid: Amino acids are organic compounds of which the proteins are formed. Amino acids are formed as a result of the process of translation. Please contain amine and carboxyl functional groups along a side chain (R group) specific for each amino acid.
Translation: It is the process of protein synthesis in which the sequence of a messenger RNA molecule translates into a sequence of amino acid. It occurs in three stages namely initiation, elongation and termination.
There are 64 combinations of nucleotides (nitrogenous bases) in the form of codons which code for 20 amino acids.

Note: Generally, there is more than one codon per amino acid. Genetic code is used contains four bases of DNA-the A, C, G, and T that can join together and read through the cellular machinery, the ribosome, and translate into the protein.