LIST I | LIST II | ||
---|---|---|---|
A | Recombination in Bacteria | I | Transcription factor |
B | Clover leaf model | II | snRNA |
C | Spliceosome | III | Rec A protein |
D | Zinc-finger | IV | t-RNA |
A - Recombination in Bacteria involves the exchange of genetic material between two similar DNA molecules. Rec A protein plays a crucial role in this process by facilitating the strand exchange between the DNA molecules, promoting genetic diversity in bacteria.
B - The Clover leaf model is a representation of the secondary structure of transfer RNA (t-RNA). t-RNA molecules fold into a cloverleaf-like shape, with specific regions responsible for carrying and transferring amino acids to the ribosome during protein synthesis.
C - The Spliceosome is a complex molecular machine found in eukaryotic cells, responsible for removing introns from pre-mRNA transcripts. Small nuclear RNAs (snRNAs) are essential components of the spliceosome, guiding its assembly and catalyzing the splicing process.
D - Zinc-finger proteins are a class of transcription factors that regulate gene expression by binding to specific DNA sequences. These proteins contain zinc ions that stabilize their structure, allowing them to recognize and bind to target DNA sequences and modulate the transcription of associated genes.
So, the correct option is (C): A-III, B-IV, C-II, D-I
List-I (Scientist) | List-II (Contribution) |
(A) A. Jeffreys | (I) Nuclein |
(B) Miescher | (II) Amino acid formation |
(C) J. Monod | (III) DNA fingerprinting |
(D) S.L. Miller | (IV) Transcriptionally regulated system |