Question

Code transfer for synthesis of polypeptide involves:
A. DNA, tRNA, rRNA and mRNA.
B. mRNA, tRNA, rRNA and DNA.
C. tRNA, DNA, mRNA and rRNA.
D. DNA, mRNA, tRNA and amino acids.

Answer 1

Hint: The genetic code is a collection of instructions that allow living cells to make proteins from genetic data found in codon sequences in DNA or RNA. Polypeptides are simply chains of amino acids. A peptide is formed when two amino acids form a peptide bond, which is the first step in the development of a protein's fundamental structure.

Complete step by step solution:
DNA codons of three bases are translated into RNA codons of complementary three bases, which are then translated into amino acids to create polypeptides. The DNA sequence of a gene dictates the amino acid sequence for the protein it encodes, just as words in a sentence. Codons are collections of three nucleotide bases that are used to interpret the DNA sequence in the protein-coding region of a gene.
A protein's codons each designate a single amino acid. The codon AUG, often known as the start codon, designates methionine. At a certain location on the mRNA, the ribosome binds. The ribosome begins matching the codon sequence of the mRNA to the anticodon sequence of the tRNA. The amino acid that was carried by each new tRNA when it entered the ribosome was added to the growing polypeptide chain. Synthesis of polypeptide involves code transfer from DNA, mRNA, tRNA and amino acids.
So, option (D) is correct.

Note:
Polypeptides are another name for proteins. The sequence of amino acids in every type of protein is distinct and identical from one molecule to the next. There are countless varieties of proteins, each with a unique amino acid sequence.