The chemical recipes of life are stored in each cell as information on _____.
A) carbohydrate molecules
B) deoxyribonucleic acid molecules
C) lipid molecules
D) amino acid molecules
Question 2Which of the following is true of Jupiter's moon Europa?
A) It is rich in organic molecules and water.
B) It appears to have a liquid-water ocean below its icy crust.
C) It has methane in its atmosphere.
D) It was brimming with life in its history.
Question 3In the Drake equation, Nc = N fp nHZ fL fI fs, the factor nHZ is:
A) the average number of planets in a solar system.
B) the average number of stars that have planets.
C) the average number of planets where life evolved to intelligence.
D) the average number of planets in each solar system suitably placed in the habitable zone.
Question 4Which of the following is true of Saturn's moon Enceladus?
A) It is rich in organic molecules.
B) It has been warmed by tidal heating.
C) It has plentiful liquid water necessary for the rise of life.
D) It is airless so any form of water would boil away into space.
Question 5Which of the following planets is the most likely place for life to exist in the Solar System?
A) Venus
B) Mars
C) Jupiter
D) Mercury
Question 6Which of the following is true of ribonucleic acid (RNA)?
A) It carries the genetic code out of the nucleus.
B) It remains safe in the nucleus of a cell.
C) It is the building block of compounds such as proteins and carbohydrates.
D) It is a long spiral molecule that stores the genetic code.
Question 7The NASA SETI project canceled by Congress was renamed__________and completed using private funds.
A) Project Phoenix
B) Gemini Program
C) Project Constellation
D) Landsat program
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