26) All of the following statements about telomeres and telomerase are true EXCE

Question

26) All of the following statements about telomeres and telomerase are true EXCEPT that(2 pts) A) telomeres shorten as cells age (senescence) B) telomerase minimizes telomere shortening C) telomerase activity is high in adult cells D) telomerase activity is high in embryonic stem cells E) None of these choices 27) Which of the following statements best describes RNAi techniques for gene silencing? (2 pts) A) siRNAs block DNA replication. B) siRNAs inhibit transcription of a gene. C) siRNAs inhibit mRNA splicing. D) siRNAs trigger degradation of mRNAs to prevent their translation. E) siRNAs prevent transport of mRNA from the nucleus to the cytoplasm. 28) What form of gene therapy involves direct injection of DNA into cells within the body? (2 pts) A) In situ hybridization B) In vivo C) In vitro D) Ex vivo E) Liposome mediated

Explanation / Answer

Ans 26:-(C) telomerase activity is high in adult cells.

Ans 27:- (D) siRNA trigger degradation of mRNA to prevent their translation

Explaination:- RNAi is the technique in which RNA molecule inhibit gene expression by degrading the mRNA.

Ans 28:- (B) In vivo

Explaination:- in vivo gene transfer is the technique in which gene is directly injected into the cells.

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