The antibiotic puromycin blocks genetic translation The anti

The antibiotic puromycin blocks genetic translation. The antibiotic actinomycinD blocks genetic transcription. These can be used to experimentally determine the mechanism of action for physiologic molecules. The effect of a hormone is immediately blocked by puromycin, but was not blocked by actinomycinD. From this you can conclude that the hormone might.. a. regulate protein synthesis by ribosomes from existing mRNA b. regulate protein degradation of active proteins by the proteosome c. bind DNA as a regulator of mRNA synthesis from DNA template d be needed for nucleic acid synthesis e. be needed for amino acid synthesis Alternative splicing of exons results in a. ribosomal assembly in the nucleolus b. the production of siRNA, miRNA, and RNA silencing c. the production of different mRNA molecules from a common precursor RNA d. posttranslational modifications of proteins e. the existence of a genome that is larger than the proteome

Solution

3. The correct answer should be option a).the hormone might regulate protein synthesis from existing mRNA. Thus, its activity was blocked by puromycin but not actinomycin D

4. correct answer is option c) alternative splicing of exon results in formation of different mRNA from the same preRNA