A) Spontaneous generation is more likely to occur during the hot days of summer.
B) Maggots do not arise spontaneously, but from eggs laid by adult flies.
C) The type of meat affects whether spontaneous generation occurs.
D) Spontaneous generation can occur only if air is present.
E) Flies will develop from rotting meat if the meat is exposed to air.
G) C) and D)
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A) Cyanobacteria
B) Amino acids and nucleotide bases
C) Pentose sugars
D) Pockets of oxygen
E) Protocells assembled from self-organizing fatty acids
G) A) and C)
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A) occurs with an increase of entropy.
B) is spontaneous.
C) requires energy.
D) results in a more random system.
E) gives off heat.
G) A) and E)
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A) No small or large prebiotic molecules were produced.
B) DNA was produced.
C) All 20 amino acids used in protein synthesis were produced.
D) Living cells were produced.
E) Nonliving protocells were produced.
G) C) and D)
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A) carried cyanobacteria that provided Earth's first oxygen.
B) carried retroviruses from which DNA molecules have been synthesized in the lab.
C) show no chemical evidence of water on Mars.
D) contain purines, pyrimidines, sugars, and ten amino acids.
E) carried amino acids that were all l-amino acids, the predominant form found in Earth organisms.
G) A) and C)
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A) The capacity for reproduction by division
B) Replication of nucleic acids using external nucleotides
C) Recognition of other cells
D) The capacity for carrying out metabolic reactions
E) Transfer of biological information to new cells
G) B) and D)
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A) cytosine.
B) uracil.
C) thymine.
D) guanine.
E) adenine.
G) B) and D)
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The protocell contains a group of nucleo...View Answer
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A) The amino acids must be an equal mixture of d- and l-isomers to be considered evidence of life.
B) The molecules should include all 20 standard amino acids found in living organisms on Earth.
C) Organic molecules on the meteorite may be from Earth organisms that contaminated it after it fell to Earth.
D) The extreme cold of Antarctica could have favored unusual chemical reactions in the meteorite before it was picked up.
E) Exposure to the sun as the meteorite lay on the snow and ice could increase the likelihood that organic molecules would form on it.
G) C) and D)
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A) 5-GCC TCG GAA CGT CTT CGA-3
B) 3-GCC CTG GAA CGT CTT CGA-5
C) 3-GCC UCG GAA CGT CUU CGA-5
D) 5-CGA GGC GTC AAC TCG CTT-3
E) 3-CGG AGC CTT GCT GAA GCT-5
G) B) and C)
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A) 1 and 4
B) 2 and 3
C) 2 and 5
D) 3 and 5
E) 4 and 5
G) C) and D)
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A) support the theory that life's molecules originated outside Earth.
B) showed that RNA can catalyze reactions.
C) showed that only the l-isomers of amino acids were formed by living organisms.
D) support the chemical evolution theory.
E) showed how biopolymers are made.
G) A) and B)
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A) The imprints of chloroplasts can be seen in the rocks.
B) Radioactive tracing of CO2 in the rocks shows similarities to modern cells.
C) Microscopic examination of the rocks shows chains of cells that are similar to modern cyanobacteria.
D) DNA analysis of the rocks shows similarities to modern cells.
E) Pieces of RNA found in the rocks are similar to ribozymes.
G) B) and E)
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A) The small molecules of life occur elsewhere than on Earth.
B) Life on Earth must have originated from extraterrestrial molecules.
C) The question of how life originated on Earth has been answered.
D) Other planets must support life.
E) Life arose in multiple places in the universe.
G) B) and C)
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A) Translation uses amino acids as building blocks.
B) Both transcription and translation use nucleotides as building blocks.
C) Both replication and transcription use amino acids as building blocks.
D) Replication uses amino acids as building blocks.
E) Both replication and translation use nucleotides as building blocks.
G) A) and D)
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A) organisms like viruses, with a protein coat.
B) the earliest known cells.
C) also known as cyanobacteria.
D) complexes formed in the lab by self-organizing fatty acids.
E) complexes formed from a ribozyme and a substrate.
G) C) and D)
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DNA structure is a linear chain of regul...View Answer
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A) ribose/deoxyribose sugars
B) phosphate ions
C) nitrogenous bases
D) nucleosides
E) hydroxyl groups
G) A) and B)
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A) It has a double ring and forms two hydrogen bonds.
B) It has a single ring and forms two hydrogen bonds.
C) It has a double ring and forms three hydrogen bonds.
D) It has a single ring and forms three hydrogen bonds.
E) It has a single ring and forms one hydrogen bond.
G) C) and E)
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A) transfer of biological information.
B) breakdown of carbohydrates.
C) transport of cellular energy.
D) storage of cellular energy.
E) transfer of environmental information to cells.
G) B) and C)
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