Question

Match List I with List II and choose the correct matches:

List - I	List - II
A. SnRNA	I. Serves as precursor for mRNA
B. LncRNA	II. Inhibits gene expression
C. miRNA	III. Regulates mRNA synthesis
D. hnRNA	IV. Involved in mRNA processing

Choose the correct answer from the options given below:

• A. A-IV, B-III, C-II, D-I \
• B. A-I, B-II, C-III, D-IV \
• C. A-IV, B-I, C-II, D-III \
• D. A-III, B-IV, C-I, D-II

Hint:

hnRNA is simply the unprocessed form of a gene transcript, meaning it always serves as the direct precursor for mature mRNA (D-I).

Answer 1

The Correct Option is A

Step 1: Concept Non-coding and coding RNA molecules perform distinct, specialized functional roles inside eukaryotic cells during transcription, post-transcriptional processing, and translational regulation.

Step 2: Meaning * snRNA: Small nuclear RNA. * lncRNA: Long non-coding RNA. * miRNA: MicroRNA. * hnRNA: Heterogeneous nuclear RNA.

Step 3: Analysis * snRNA (A) forms complexes with proteins to construct small nuclear ribonucleoproteins (snRNPs) that catalyze the splicing and processing of pre-mRNA transcripts $\rightarrow$ (A-IV). * lncRNA (B) contains longer non-coding strands that interact with chromatin remodeling complexes to chemically regulate transcription and mRNA synthesis parameters $\rightarrow$ (B-III). * miRNA (C) functions in RNA silencing by base-pairing with complementary sequences on target mRNA molecules to induce degradation or translational repression, which inhibits gene expression $\rightarrow$ (C-II). * hnRNA (D) is the direct product of RNA polymerase II transcription containing introns and exons, acting as the primary precursor molecule that is processed into mature mRNA $\rightarrow$ (D-I).

Step 4: Conclusion The resulting unified configuration is A-IV, B-III, C-II, D-I, matching option A. Final Answer: (A)