A) m-RNA molecule
B) Protein molecule
C) Another DNA molecule
D) t-RNA molecule
Correct Answer: B
Solution :
DNA is not directly involved in the sysnthesis of protein molecules. Protein synthesis takes place by translation, the process by which the genetic message carried by m-RNA from the DNA is converted in the form of a polypeptide chain having a specific sequence of amino acids. Plus protein synthesis is an extra-nuclear process which occurs on the ribosomes, the rib nucleoprotein particles that provide the sites for protein synthesis. Protein synthesis follows the central dogma of molecular biology; the basic mechanism by which DNA makes RNA, which in turn makes protein. \[\text{DNA}\xrightarrow[{}]{\text{Replication}}\text{DNA}\xrightarrow[{}]{\text{Transcription}}\]\[\text{RNA}\xrightarrow[{}]{\text{Transcription}}\text{Protein}\] All processes except translation, i.e., replication and transcription, take place within nucleus or are intra-nuclear. Thus, DNA maybe said to control protein synthesis, but not directly involved with it.
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