The Surface of This Planet Is Obscured by an Atmosphere

question 31

Multiple Choice

The surface of this planet is obscured by an atmosphere of thick clouds and toxic gases. What planetary body is it?

• A) Mercury
• B) Earth
• C) Earth's moon
• D) Mars
• E) Venus

---

Definitions:

Poly-A Tail

A stretch of adenine nucleotides added to the 3' end of mRNA molecules, protecting the mRNA and aiding in its export from the nucleus.

Transcriptional

Pertaining to transcription, the process by which genetic information from DNA is copied to RNA, leading to protein synthesis.

Posttranscriptional

Pertaining to modifications and processes that occur in a eukaryotic cell after transcription of DNA into RNA, affecting mRNA stability, translation, and other aspects.

Pretranscriptional

Pertaining to the biological regulatory processes that occur before the transcription of DNA to RNA.