Exam 4: Nucleic Acids and the Rna World

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In the context of chemical evolution,DNA's structure is interesting because it suggests a possible copying mechanism.What about DNA's structure facilitates copying?

(Multiple Choice)

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Question 21

The work of Bartel's group on the ribozyme RNA replicase supports which conclusion?

(Multiple Choice)

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Question 22

Why is DNA said to be antiparallel?

(Multiple Choice)

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Question 23

Which of the following did Watson and Crick already know when they were trying to determine the structure of DNA?

(Multiple Choice)

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Question 24

Which one of the following is not a way that RNA is seen as intermediate between DNA and proteins?

(Multiple Choice)

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Question 25

Hairpins and stem-and-loop patterns make up what part of RNA's structure?

(Multiple Choice)

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Question 26

Franklin and Wilkins analyzed DNA by bombarding DNA crystals with X-rays.Their analysis yielded two numbers that sparked interest,3.4 nm and 0.34 nm.What is the significance of these numbers?

(Multiple Choice)

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Question 27

What is responsible for holding the two strands together in the DNA double helix?

(Multiple Choice)

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Question 28

Which of the following nitrogenous bases is found in RNA,but not DNA?

(Multiple Choice)

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Question 29

All organisms have which of the following attributes?

(Multiple Choice)

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Question 30

Nucleic acids have a definite polarity,or directionality.Stated another way,one end of the molecule is different from the other end.How are these ends described?

(Multiple Choice)

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Question 31

When doing gel electrophoresis,why do researchers add a "ladder" made up of molecules of known size?

(Multiple Choice)

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Question 32

Which of the following best describes DNA's secondary structure?

(Multiple Choice)

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Question 33

If a molecule of DNA contains 10% cytosine,it has guanine and adenine respectively.

(Multiple Choice)

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Question 34

Is Nakano's quote consistent with the textbook's claim that RNA is a good candidate for the first life-form?

(Multiple Choice)

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Question 35

Which of these scientists was not directly involved in the discovery of DNA's structure?

(Multiple Choice)

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Question 36

What can be inferred about the free-energy profile for the self-cleavage reaction from the information provided in the paragraph?

(Multiple Choice)

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Question 37

What feature of mononucleotides provides the energy needed for polymerization when nucleic acids are formed?

(Multiple Choice)

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Question 38

By convention,the sequence of bases in a nucleic acid is always written in which direction?

(Multiple Choice)

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Question 39

Why is DNA more appropriate than RNA as the information storing molecule of the cell?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 40

Exam 4: Nucleic Acids and the Rna World

In the context of chemical evolution,DNA's structure is interesting because it suggests a possible copying mechanism.What about DNA's structure facilitates copying?

The work of Bartel's group on the ribozyme RNA replicase supports which conclusion?

Why is DNA said to be antiparallel?

Which of the following did Watson and Crick already know when they were trying to determine the structure of DNA?

Which one of the following is not a way that RNA is seen as intermediate between DNA and proteins?

Hairpins and stem-and-loop patterns make up what part of RNA's structure?

Franklin and Wilkins analyzed DNA by bombarding DNA crystals with X-rays.Their analysis yielded two numbers that sparked interest,3.4 nm and 0.34 nm.What is the significance of these numbers?

What is responsible for holding the two strands together in the DNA double helix?

Which of the following nitrogenous bases is found in RNA,but not DNA?

All organisms have which of the following attributes?

Nucleic acids have a definite polarity,or directionality.Stated another way,one end of the molecule is different from the other end.How are these ends described?

When doing gel electrophoresis,why do researchers add a "ladder" made up of molecules of known size?

Which of the following best describes DNA's secondary structure?

If a molecule of DNA contains 10% cytosine,it has ________ guanine and ________ adenine respectively.

Is Nakano's quote consistent with the textbook's claim that RNA is a good candidate for the first life-form?

Which of these scientists was not directly involved in the discovery of DNA's structure?

What can be inferred about the free-energy profile for the self-cleavage reaction from the information provided in the paragraph?

What feature of mononucleotides provides the energy needed for polymerization when nucleic acids are formed?

By convention,the sequence of bases in a nucleic acid is always written in which direction?

Why is DNA more appropriate than RNA as the information storing molecule of the cell?

Biology and the Tree of Life

Water and Carbon: the Chemical Basis of Life

Protein Structure and Function

An Introduction to Carbohydrates

Lipids, membranes, and the First Cells

Inside the Cell

Cell-Cell Interactions

Cellular Respiration and Fermentation

Photosynthesis

The Cell Cycle

Meiosis

Mendel and the Gene

Dna and the Gene: Synthesis and Repair

How Genes Work

Transcription, RNA Processing, and Translation

Control of Gene Expression in Bacteria

Control of Gene Expression in Eukaryotes

Analyzing and Engineering Genes

Genomics

Principles of Development

An Introduction to Animal Development

An Introduction to Plant Development

Evolution by Natural Selection

Evolutionary Processes

Speciation

Phylogenies and the History of Life

Bacteria and Archaea

Protists

Green Algae and Land Plants

Fungi

An Introduction to Animals

Protostome Animals

Deuterostome Animals

Viruses

Plant Form and Function

Water and Sugar Transport in Plants

Plant Nutrition

Plant Sensory Systems, signals, and Responses

Plant Reproduction

Animal Form and Function

Water and Electrolyte Balance in Animals

Animal Nutrition

Gas Exchange and Circulation

Electrical Signals in Animals

Animal Sensory Systems and Movement

Chemical Signals in Animals

Animal Reproduction

The Immune System in Animals

An Introduction to Ecology

Behavioural Ecology

Population Ecology

Community Ecology

Ecosystems

Biodiversity and Conservation Biology

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If a molecule of DNA contains 10% cytosine,it has guanine and adenine respectively.