Question

The difference(s) between mRNA and tRNA is/are that:
(i) mRNA has a more elaborate 3 - dimensional structure due to extensive base - pairing
(ii) tRNA has a more elaborate 3 - dimensional structure due to extensive pairing
(iii) tRNA is usually smaller than mRNA
(iv) mRNA bears anticodon but tRNA has codons
A) (i) and (iii)
B) All of these
C) (ii) and (iii)
D) (i), (ii) and (iii)

Answer 1

Hint: Nucleic acids are biomolecules or monomers that are responsible for the formation of DNA and RNA. They are naturally occurring and are very large. They are considered the primary information-carrying molecules in all living organisms.

Complete answer:
RNA is a five-carbon sugar which is attached with a phosphate group and a nitrogenous base. In RNA all nitrogenous bases are the same as DNA but instead of pyrimidine thymine; uracil is attached to the sugar. A DNA molecule has coding and non-coding regions. The coding regions are known as the exons and the non-coding regions are known as introns. RNA is transcribed from DNA. There are various types of RNA present in an organisms’ body that have different functions. The RNA strand that is transcribed only from the coding region of the DNA is known as messenger RNA (mRNA). Its primary function is to make proteins. Different types of RNA are formed from non-coding parts of the DNA. One example is transfer RNA (tRNA). Its main function is to help mRNA in translation. tRNA is a small molecule in comparison to mRNA. Since mRNA is formed from the coding regions of the DNA, it has a more elaborate 3D structure than tRNA. This is due to extensive base-pairing.

Hence, the correct answer is option A.

Note:
Nucleic acids are the primary components in an organism's cell. They are responsible for carrying the genetic information of organisms and passing it on within generations. It is responsible for maintaining hereditary. They play a very crucial role in the synthesis of proteins and directing all the important mechanisms in the body essential for living.