天文学 TPO30-L3 Jarosite

TPO30-L3

Jarosite


 

 

  1. What is the lecture mainly about?
  • A. Evidence proving that water was once on Mars
  • B. Scientific analyses currently being done on mineral samples from Mars
  • C. Recent developments that could help determine whether life ever existed on Mars
  • D. An approach to determining whether amino acids on Earth originated on Mars

 

  1. What was discovered on Mars that suggests water once existed there?
  • A. Microorganisms that can form only in the presence of water.
  • B. A mineral that can form only in the presence of water.
  • C. Proteins that have the same structure as proteins found on Earth.
  • D. Large deposits of iron and potassium that can form only in the presence of water.

 

  1. How might jarosite found on Mars differ from jarosite found on Earth?
  • A. Mars jarosite and Earth jarosite might have been created by different processes.
  • B. Mars jarosite might have been formed without water.
  • C. Mars jarosite might not contain as much iron or potassium as Earth jarosite.
  • D. Mars jarosite might be more acidic than Earth jarosite.

 

  1. According to the professor, what are TWO important capabilities of the micro fabricated organic analyzer?  [CHOOSE 2 ANSWERS]
  • A. It can accurately test for the presence of water.
  • B. It can analyze soil samples without returning them to Earth.
  • C. It can return soil samples back to Earth quickly.
  • D. It can determine the handedness of amino acids.

 

  1. What point does the professor make about the twenty amino acids that occur on proteins on Earth?
  • A. They can be either right-handed or left-handed.
  • B. They were synthesized through abiotic processes.
  • C. They all have a crystalline structure.
  • D. They are all left-handed.

 

  1. What would a prevalence of right-handed amino acids in mineral samples collected on Mars indicate?
  • A. That amino acids on Mars probably originated on Earth
  • B. That amino acids existed on Mars long before they existed on Earth
  • C. That a type of microorganism may have existed on Mars that is different from any on Earth
  • D. That left-handed amino acids are probably present in some minerals on Mars

handed molecules


答案:
C B A BD D C

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