Question 1

The term ____________ refers broadly to compounds that contain carbon.

Accepted Answer

The answer of The term ____________ refers broadly to compounds...

Question 2

Heating dry mixtures of amino acids and then mixing them with water forms small

Accepted Answer

A)   strands of DNA.
B)   living cells.
C)   proteinoid microspheres.
D)   plasma membranes.E) A) and B)
F) All of the above

Question 3

Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called __________ ___________.

Accepted Answer

The answer of Submarine hot springs where seawater seeps through...

Question 4

Does the recognition of prokaryotes as two major lineages,Archaebacteria and Eubacteria,result in any major changes to the internal taxonomic arrangement of the fungi,protozoan groups,plants and animals?

Accepted Answer

The recognition of prokaryotes as two ma...

Question 5

What may have been the "reason" for the "Cambrian explosion"?

Accepted Answer

The "Cambrian explosion" refers to a rel...

Question 6

Why can't we set up an experiment that would again duplicate the conditions that were present at the early origin of protocells?

Accepted Answer

Setting up an experiment to duplicate th...

Question 7

Amino acids are linked together to form proteins by __________ bonds.

Accepted Answer

The answer of Amino acids are linked together to form...

Question 8

A solution that has a pH of 5 has

Accepted Answer

A)   a concentration of H+ 20 times higher than water.
B)   a concentration of H+ 100 times higher than water.
C)   a concentration of H+ the same as water.
D)   a concentration of H+ 20 times lower than water.
E)   a concentration of H+ 100 times lower than water.F) C) and D)
G) A) and B)

Question 9

An alternative environment to the "hot dilute soup" and clay hypothesis that offers a possible source of energy and molecules for the origin of life is/are the

Accepted Answer

A)   frozen Antarctic ice sheets.
B)   surface of Mars.
C)   hydrothermal vents in ocean bottoms.
D)   Earth mantle and core.E) B) and C)
F) None of the above

Question 10

If the hypothesis that protocells were based on an "RNA world" is correct,what would be necessary to shift to a "DNA world"?

Accepted Answer

A)   An enzyme or reaction capable of removing one oxygen from ribose in nucleotides
B)   Enzymes for reverse transcription of RNA into DNA
C)   New enzymes to replicate the DNA
D)   New enzymes for transcribing DNA back to RNA
E)   All are necessary to switch to a "DNA world."F) B) and E)
G) A) and E)

Question 11

Prions are infectious

Accepted Answer

A)   carbohydrates.
B)   proteins.
C)   lipids.
D)   Prions are not actually infectious.E) B) and C)
F) A) and B)

Question 12

Which of the following carbohydrates is used in animal muscle and liver cells for energy storage?

Accepted Answer

A)   Starch
B)   Chitin
C)   Cellulose
D)   GlycogenE) None of the above
F) B) and D)

Question 13

Sidney Fox studied the synthesis of polypeptides into polymers which in water formed small spherical bodies called ____________ _____________.

Accepted Answer

proteinoid...

Question 14

At the molecular level,a cell's ability to vary in its operational tolerance to temperature,etc.,is most closely related to

Accepted Answer

A)   enzyme activity and protein denaturation.
B)   ATP efficiency.
C)   replication of nucleic acids.
D)   extent of saturation of fatty acids.E) A) and C)
F) C) and D)

Question 15

Which of the following is the most abundant carbohydrate in the world?

Accepted Answer

A)   Cellulose
B)   Glycogen
C)   Fructose
D)   GlucoseE) C) and D)
F) B) and C)

Question 16

Who first performed an experiment that proved that amino acids could be produced in the laboratory from a reducing atmosphere and electrical sparks?

Accepted Answer

A)   Stanley Miller and Harold Urey
B)   Graham CairnsSmith
C)   Thomas Cech
D)   Alexander Oparin and J.B.S. HaldaneE) B) and D)
F) None of the above

Question 17

A molecule of RNA that has enzymatic or catalytic properties is called a _______________.

Accepted Answer

A)   deoxyribose
B)   nucleotide
C)   ribonucleic acid
D)   ribozymeE) All of the above
F) None of the above

Question 18

DNA and RNA are polymers composed of repeated units called

Accepted Answer

A)   nucleotides.
B)   bases.
C)   sugars.
D)   None of the choices are correct.E) A) and B)
F) C) and D)

Question 19

Describe the first evidence for chemical evolution that came from Stanley Miller's experiment.

Accepted Answer

The first evidence for chemical evolutio...

Question 20

What evidence do scientists have that the earth's primeval atmosphere was a reducing atmosphere?

Accepted Answer

Scientists have gathered evidence to sup...

Exam 2: The Origin and Chemistry of Life

At the molecular level,a cell's ability to vary in its operational tolerance to temperature,etc.,is most closely related to

Correct AnswerverifiedShow Answer

A molecule of RNA that has enzymatic or catalytic properties is called a _______________.

Correct AnswerverifiedShow Answer

Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called __________ ___________.

Correct AnswerverifiedShow Answer

Amino acids are linked together to form proteins by __________ bonds.

Correct AnswerverifiedShow Answer

Describe the first evidence for chemical evolution that came from Stanley Miller's experiment.

Correct AnswerAnswered by ExamLex AIThe first evidence for chemical evolutio...View AnswerShow Answer

Which of the following is the most abundant carbohydrate in the world?

Correct AnswerverifiedShow Answer

Why can't we set up an experiment that would again duplicate the conditions that were present at the early origin of protocells?

Correct AnswerAnswered by ExamLex AISetting up an experiment to duplicate th...View AnswerShow Answer

Which of the following carbohydrates is used in animal muscle and liver cells for energy storage?

Correct AnswerverifiedShow Answer

Who first performed an experiment that proved that amino acids could be produced in the laboratory from a reducing atmosphere and electrical sparks?

Correct AnswerverifiedShow Answer

A solution that has a pH of 5 has

Correct AnswerverifiedShow Answer

Heating dry mixtures of amino acids and then mixing them with water forms small

Correct AnswerverifiedShow Answer

What may have been the "reason" for the "Cambrian explosion"?

Correct AnswerAnswered by ExamLex AIThe "Cambrian explosion" refers to a rel...View AnswerShow Answer

If the hypothesis that protocells were based on an "RNA world" is correct,what would be necessary to shift to a "DNA world"?

Correct AnswerverifiedShow Answer

An alternative environment to the "hot dilute soup" and clay hypothesis that offers a possible source of energy and molecules for the origin of life is/are the

Correct AnswerverifiedShow Answer

DNA and RNA are polymers composed of repeated units called

Correct AnswerverifiedShow Answer

Does the recognition of prokaryotes as two major lineages,Archaebacteria and Eubacteria,result in any major changes to the internal taxonomic arrangement of the fungi,protozoan groups,plants and animals?

Correct AnswerAnswered by ExamLex AIThe recognition of prokaryotes as two ma...View AnswerShow Answer

Sidney Fox studied the synthesis of polypeptides into polymers which in water formed small spherical bodies called ____________ _____________.

Correct Answerverifiedproteinoid...View AnswerShow Answer

Prions are infectious

Correct AnswerverifiedShow Answer

The term ____________ refers broadly to compounds that contain carbon.

Correct AnswerverifiedShow Answer

What evidence do scientists have that the earth's primeval atmosphere was a reducing atmosphere?

Correct AnswerAnswered by ExamLex AIScientists have gathered evidence to sup...View AnswerShow Answer

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Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called _.

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The first evidence for chemical evolutio...
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Setting up an experiment to duplicate th...
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Correct Answer
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The "Cambrian explosion" refers to a rel...
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Correct Answer
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Correct Answer
Answered by ExamLex AI
The recognition of prokaryotes as two ma...
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Sidney Fox studied the synthesis of polypeptides into polymers which in water formed small spherical bodies called _.

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proteinoid...
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Correct Answer
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Answered by ExamLex AI
Scientists have gathered evidence to sup...
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