Assertion : All three ENAs (mRNA, tRNA and rRNA) are needed to synthesise a protein in a cell.
Reason : The mRNA provides the template, RNA brings aminoacids and reads the genetic code, and tRNA play structural and catalytic role.a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If both assertion and reason are true but reason is not the correct explanation of the assertion. c. If assertion is true but reason is false. d. If both assertion and reason are false.

Sure, here are the step-by-step solutions: 1. To synthesize a protein in a cell, three types of RNA are needed: mRNA, tRNA, and rRNA. 2. mRNA serves as a template for protein synthesis. It carries the genetic information from DNA to the ribosome, where it is read and translated into a sequence of amino acids. 3. tRNA reads the genetic code carried by the mRNA and delivers the appropriate amino acid to the ribosome. Each tRNA molecule is specific for a particular amino acid and has an anticodon that matches the codon on the mRNA. 4. rRNA plays a structural and catalytic role in the ribosome. It helps to hold the mRNA and tRNA in the correct positions for protein synthesis and catalyzes the formation of peptide bonds between adjacent amino acids. 5. Together, these three types of RNA work together to ensure accurate and efficient protein synthesis in the cell.