Question

mRNA is a polymer of
(a) Deoxyribonucleosides
(b) Ribonucleosides
(c) Deoxyribonucleotides
(d) Ribonucleotides

Answer 1

Hint: mRNA stands for messenger RNA which carries a coding sequence for protein synthesis. These are known as transcripts. Messenger RNA transfers genetic information from DNA to the cytoplasm and is single-stranded.

Complete answer:
mRNA is a polymer of ribonucleotides which are made up of ribose sugar, phosphoric acid and a nitrogenous base. It helps in the formation of polypeptides. The process of synthesis of proteins required nucleotide and triphosphate as substrates. This process is catalyzed by the enzyme RNA polymerase ll. Messenger RNA carries the genetic information from the DNA with a series of 3 base codes and each of them represents a particular amino acid. These codes are carried from the DNA to the site of the protein synthesis in the cytoplasm which is the ribosomes. The copying of a gene from the DNA into mRNA includes the process of transcription which is different in both eukaryotic and prokaryotic organisms. The association of RNA polymerase with the process of DNA processing enzymes takes place during transcription which causes the new mRNA strand to produce a complementary strand and make it double-stranded which is known as the transfer RNA strand.
The mRNA starts the process of transcription which ends with the degradation during the edited and transported to word translation. The unprocessed or partly processed product during the transcription is known as the precursor mRNA or pre-mRNA.

So, the correct answer is 'Ribonucleotides'.

Note:
The RNA constitutes $5\%$ weight of the human cell and $1\%$ is of DNA. RNA is used for cancer gene therapies to prevent the expression of cancer-causing genes. Some mRNA vaccines are highly effective on the strain of covid-19 and are used to prevent covid-19 illness through vaccination and have passed all the safety standards by many people.