Gene Expression: Promoter, tRNA, Exons — NEET Biology

Correct answer: D — A-IV, B-I, C-II, D-VI, E-V, F-III

This question assesses the understanding of key structural and functional elements involved in DNA packaging, transcription, and translation, as detailed in NCERT. A. The Promoter is a DNA sequence that provides a binding site for RNA polymerase, initiating transcription. So, A-IV. B. The Terminator is a sequence located towards the 3'-end of the coding strand that defines the end of the transcription process. So, B-I. C. The Anticodon loop of tRNA has bases complementary to the genetic code (codon) on the mRNA, facilitating specific pairing. So, C-II. D. The Initiator tRNA is a specific tRNA molecule that recognises and binds to the start codon (AUG), initiating protein synthesis. So, D-VI. E. Untranslated Regions (UTRs) are additional sequences present at both 5'-end (before start codon) and 3'-end (after stop codon) of mRNA, required for efficient translation. So, E-V. F. A Histone octamer is a unit of eight histone molecules around which negatively charged DNA is wrapped to form a nucleosome, crucial for DNA packaging in eukaryotes. So, F-III. Thus, the correct match is A-IV, B-I, C-II, D-VI, E-V, F-III.