AP Bio Quiz Ch 20
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The fact that no one knows how life began on earth is one of the primary unsolved questions of biology since life began on earth 4billion years ago. Test how well you understood the topic in AP class on history and origin of life on earth by taking this challenging but short quiz.
- 1.Which of the following kinds of molecules is thought to have been absent from the primitive reducing atmosphere?
- A.
Water vapor (H2O)
- B.
Carbon dioxide (CO2)
- C.
Hydrogen (H2)
- D.
Oxygen (O2)
- E.
Nitrogen (N2)
- 2.The person who performed an experiment that proved that amino acids could be produced in the laboratory from a reducing atmosphere and electrical sparks was
- A.
Stanley Miller.
- B.
Graham Cairns-Smith.
- C.
Thomas Cech.
- D.
Aleksander Oparin.
- E.
Sidney Fox.
- 3.Which statement is NOT true about the RNA-first hypothesis?
- A.
It is supported by the discovery that RNA can act as a catalyst.
- B.
It is supported by the fact that some viruses have RNA as their genetic material.
- C.
It suggests that there was an "RNA world" about 4 billion years ago.
- D.
It says that first RNA, then DNA, then proteins would have been necessary to interact in the chemical evolution that would have led to the development of the first cells.
- 4.Which of these would have been most likely to develop only after the formation of a true cell?
- A.
Autotroph
- B.
Heterotroph
- C.
Protocell
- D.
Microsphere
- E.
Proteinoid
- 5.The dilemma of whether proteins or nucleic acids directed the first synthesis of the other is avoided by the
- A.
Protein-first hypothesis.
- B.
RNA-first hypothesis.
- C.
Clay-catalyst hypothesis.
- 6.Prokaryotic cells are represented by fossils that are dated back as far as _____ billion years ago.
- A.
1.5
- B.
2.8
- C.
3.8
- D.
4.8
- 7.The oxidizing atmosphere probably developed about _____ billion years ago.
- A.
1.5
- B.
2.5
- C.
3.5
- D.
4.5
- 8.A ribozyme is a molecule of RNA that has catalytic properties.
- A.
True
- B.
False
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