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Practice each question, then open the answer or worked solution.
What are the functions of (i) methylated guanosine cap, (ii) poly-A “tail” in a mature on RNA?
Ans: Methylated Guanosine Cap is a protein that regulates the nuclear export of mRNA. It encourages people to translate. (hnRNA that has been fully processed is referred to as mRNA.)
Poly-A Tail's role is to protect RNA from exonuclease degradation. Plays a key function in the conclusion of transcription.
Do you think that the alternative splicing of exons may enable a structural gene to code for several iso proteins from one and the same gene? If yes, how? If not, why so?
Ans: Approximately 95% of multi-exonic genes in humans are alternatively spliced. Alternative splicing aids in the production of many proteins from a single gene. A certain exon may be excluded from or included in a specific RNA during this procedure. Alternative splicing is a type of splicing those results in a single gene coding for numerous proteins.
Comment on the utility of variability in a number of tandem repeats during DNA fingerprinting.
Ans: In DNA fingerprinting, variability in the number of tandem repeats (VNTR) is quite valuable. Gel electrophoresis or Southern blotting are used to examine the DNA sample. VNTR then appears as a pattern of lines of varying lengths. The lengths of lines and the order in which they are arranged differ from one person to the next. This is similar to how a person's fingerprint is unique. As a result, VNTR aids in determining an individual's specific identify through DNA finger printing.