Question

6. Synthesis of a protein is an example of a chemical reaction that is: O endergonic and anabolic. O endergonic and catabolic. O exergonic and catabolic. O explosive. O exergonic and anabolic.

Answer 1

6.Ans:-Endergonic and anabolic.

Explanation:-The reaction in which energy is needed to carry out the reaction is known as Endergonic reaction which is non-spontaneous in nature.The reaction in which energy is released is known as exergonic reaction which is spontaneous in nature.Anbolic is the process which builds up the complex molecule by using energy.Catabolic is the process which breaks down the complex molecule to smaller molecules with the release of energy.As intake of energy takes place in Anbolic process,so it is an Endergonic process as energy is being released in catabolic process so it is an Exergonic process.Translation is the process of synthesis of protein from mRNA with the help of ribosome.A translational unit in mRNA from 5' to 3' comprises of a start codon,region coding for a polypeptide,a stop codon and untranslated region at both 5' end and 3' end for efficient process.There are 3 stages in protein synthesis initiation,Elongation,Termination.In prokaryotes,initiation requires the large and small ribosome subunits,the mRNA initiation tRNA and 3 initiation factors(IFs).Amino acids become activated by binding with aminoacyl tRNA synthetase enzyme in the presence of ATP.The AA-AMP -Enzyme complex formed reacts with specific tRNA to form aminoacyl t-RNA complex.As ,energy is used in initiation so,protein synthesis is endergonic process .As protein is synthesised from mRNA,that means protein(complex molecules) formed from simpler one(mRNA) so,it is a anabolic process.All other options are incorrect.Anabolic and endergonic is correct.