Question

Question 53 (1 point) Transcription of RNA from RNA is not a normal cellular process. Question 53 options: A) True B) False

Question 54 (1 point) At the time of Louis Pasteur and Robert Koch, the term"virus" was used to refer to: Question 54 options: anthrax etiologic agent of tuberculosis cholera etiologic agent of syphilis all of the above

Question 55 (1 point) Which of the following types of animal virus requires RNA-dependent RNA polymerase for replication? Question 55 options: A) -ssRNA viruses B) +ssRNA viruses C) dsRNA viruses D) A and B only E) A, B, and C

Question 56 (1 point) Which of the following viruses contain dsRNA genome? Question 56 options: A) orthomyxoviridae B) rhabdoviridae C) picornaviridae D) reoviridae E) paramyxoviridae

Answer 1

False

The given statement is incorrect because RNA can be transcribed only from DNA according to Central dogma of Molecular Biology. According to this dogma, the flow of genetic information is always from DNA to RNA and then to proteins. DNA directly cannot form proteins and therefore required and RNA intermediate. The process of formation of RNA from DNA is called as transcription. The normal process used DNA as a template and DNA dependent RNA polymerase enzyme. But in certain exceptions, like RNA viruses, the flow of information is Reversed. The information flows from RNA to DNA and the process is called as reverse transcription. It uses reverse transcriptase enzyme which is RNA dependent DNA polymerase. Also transcription of RNA from RNA is unavailable process in RNA viruses.

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