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InterviewSolution
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Question : Differentiate between the followings:a. Repetitive DNA and Satellite DNA b. mRNA and tRNAc. Template strand and Coding strand |
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Answer» Solution : a. Repetitive sequences are stretches of DNA sequences that arerepeated many times, sometimes hundred to thousand times. When the repetitive DNA sequences are separated from bulk genomic DNA as different peaks during density gradient centrifugation, the bulk DNA forms major peak and the other small peaks are referred to assatellite DNA. b. mRNA or messenger RNA is transcribed from DNA. It carries thegenetic information from DNA to the ribosomes for protein SYNTHESIS. tRNA or transfer RNA is the smallest RNA. It has a triplet code which is complementary to the CODON in the mRNA. It carries amino acids to the SITE of protein synthesis. c. The strand with polarity `3. to 5. `acts as a template during DNAsynthesis. This strand is called template strand. The strand whichdoes not code for anything is called coding strand. |
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