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Exam 22: Nucleic Acids

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Question 1

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Use the following to answer the questions below: In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: -Statements: (1) In general, RNA molecules are much smaller than DNA molecules. (2) Recombinant DNA molecules contain DNA segments from two different organisms. (3) In DNA replication, the action of the enzyme DNA helicase causes the DNA double helix to unwind.

A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

E) C) and D)
F) A) and D)

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Question 2

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Use the following to answer the questions below: For each of the heterocyclic bases, choose a correct characterization from the response list. Responses may be used more than once or need not be used at all. -Uracil

A) base found only in DNA
B) base found only in RNA
C) "single ring" base found in both DNA and RNA
D) "double ring" base

E) B) and D)
F) B) and C)

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Question 3

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Which of the following is not necessary for protein synthesis at the time and place where synthesis occurs?

Which of the following are the three "single ring" bases that occur in nucleic acids?

Use the following to answer the questions below: In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: -Statements: (1) In nucleotide formation, the base always attaches to the sugar at the sugar's C-1' position. (2) The genetic code is based on the concept that a single codon exists for each of the 20 standard amino acids. (3) Codons are found in tRNA molecules and anticodons are found in mRNA molecules.

Which of the following changes is associated with the post-translation processing of a protein?

Which of the following events occurs during the transcription phase of protein synthesis?

Which of the following is a correct structural characteristic of a nucleotide?

In a dinucleotide the phosphate linkage between nucleotide units involves

Use the following to answer the questions below: In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: -Statements: (1) Nucleotides are related to nucleic acids in the same way that amino acids are related to proteins. (2) Associated with the structure of tRNA molecules are "hairpin loops." (3) The bases A, G, and U are found in both DNA and RNA molecules.

Use the following to answer the questions below: For each of the base-pairing situations, select a correct possible base-pairing sequence from the response list. Responses may be used more than once or need not be used at all. -Base pairing between a DNA and RNA segment

Associated with the process of DNA transcription is the formation of

The role of E. coli plasmids in recombinant DNA work is to

In which of the following sets of nucleic acid "building blocks" are all members of the set possible components of a DNA molecule?

In DNA replication the unwinding of the double helix

Which of the following types of RNA has a "cloverleaf shape" with three hairpin loops?

The region of a DNA strand carrying the information needed for synthesis of a specific protein is called a

Use the following to answer the questions below: In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: -Statements: (1) DNA nucleotides contain three subunits, and RNA nucleotides contain four subunits. (2) Complementary base pairing in DNA involves the base combinations (A and T) and (G and C) . (3) The interaction between anticodon and codon governs the proper placement of amino acids in a protein.

Which of the following enzymes associated with DNA replication is paired with its correct function?

Use the following to answer the questions below: For each of the heterocyclic bases, choose a correct characterization from the response list. Responses may be used more than once or need not be used at all. -Cytosine