Question 1

The carbohydrates that form part of nucleosides in RNA and DNA,respectively,are:

Accepted Answer

A) d-ribose and 2-deoxy-l-ribose 
B) d-ribose and 2-deoxy-d-ribose 
C) l-ribose and 2-deoxy-l-ribose 
D) 2-deoxy-d-ribose and d-ribose 
E) 2-deoxy-l-ribose and d-ribose 
A) d-ribose and 2-deoxy-l-ribose 
B) d-ribose and 2-deoxy-d-ribose 
C) l-ribose and 2-deoxy-l-ribose 
D) 2-deoxy-d-ribose and d-ribose 
E) 2-deoxy-l-ribose and d-ribose

Question 2

During the laboratory synthesis of oligonucleotides

Accepted Answer

A) A phosphite triester is oxidized to a phosphate triester with iodine. 
B) A phosphate triester is reduced to a phosphite triester with iodine. 
C) A phosphate triester is reduced to a phosphite triester with tetrazole. 
D) A phosphite triester is oxidized to a phosphate triester with tetrazole. 
E) A phosphite triester is oxidized to a phosphate triester with NH4OH. 
A) A phosphite triester is oxidized to a phosphate triester with iodine. 
B) A phosphate triester is reduced to a phosphite triester with iodine. 
C) A phosphate triester is reduced to a phosphite triester with tetrazole. 
D) A phosphite triester is oxidized to a phosphate triester with tetrazole. 
E) A phosphite triester is oxidized to a phosphate triester with NH4OH.

Question 3

Which is the predominant tautomeric form of cytosine when it is present in DNA?

Accepted Answer

A) I 
B) II 
C) III 
D) None of these choices. 
E) I,II and III are present in approximately equal amounts. 
A) I 
B) II 
C) III 
D) None of these choices. 
E) I,II and III are present in approximately equal amounts.

Question 4

The action of nitrous acid (HNO2)on 5-methylcytosine produces which nitrogen base?

Accepted Answer

A) Adenine 
B) Guanine 
C) Cytosine 
D) Thymine 
E) Uracil 
A) Adenine 
B) Guanine 
C) Cytosine 
D) Thymine 
E) Uracil

Question 5

If an mRNA codon is GUC,what was the original base sequence in DNA?

Accepted Answer

A) GUC 
B) GTC 
C) CAG 
D) GAC 
E) CTG 
A) GUC 
B) GTC 
C) CAG 
D) GAC 
E) CTG

Question 6

If you start a PCR amplification with one molecule of double stranded DNA,how many double stranded copies will you obtain after 10 cycles?

Accepted Answer

A) 2 
B) 8 
C) 20 
D) 1024 
E) 512 
A) 2 
B) 8 
C) 20 
D) 1024 
E) 512

The carbohydrates that form part of nucleosides in RNA and DNA,respectively,are:

During the laboratory synthesis of oligonucleotides

Which is the predominant tautomeric form of cytosine when it is present in DNA?

The action of nitrous acid (HNO₂)on 5-methylcytosine produces which nitrogen base?

If an mRNA codon is GUC,what was the original base sequence in DNA?

If you start a PCR amplification with one molecule of double stranded DNA,how many double stranded copies will you obtain after 10 cycles?

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Filters

Exam 25: Nucleic Acids and Protein Synthesis

The carbohydrates that form part of nucleosides in RNA and DNA,respectively,are:

During the laboratory synthesis of oligonucleotides

Which is the predominant tautomeric form of cytosine when it is present in DNA?

The action of nitrous acid (HNO2)on 5-methylcytosine produces which nitrogen base?

If an mRNA codon is GUC,what was the original base sequence in DNA?

If you start a PCR amplification with one molecule of double stranded DNA,how many double stranded copies will you obtain after 10 cycles?

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Filters

The action of nitrous acid (HNO₂)on 5-methylcytosine produces which nitrogen base?