Question 1

In an entire DNA strand, what percentage consists of genetic information and what percentage consists of introns?

Accepted Answer

A) 98% genetic information, 2% introns 
B) 2% genetic information, 98% introns 
C) 50% genetic information, 50% introns 
D) 100% genetic information, 0% introns 
E) 99% genetic information, 1% introns 
A) 98% genetic information, 2% introns 
B) 2% genetic information, 98% introns 
C) 50% genetic information, 50% introns 
D) 100% genetic information, 0% introns 
E) 99% genetic information, 1% introns

Question 2

What is a nucleoside? Give an example.

Accepted Answer

A nucleosi

Question 3

Show the hydrogen bonding which occurs when guanine and cytosine form a base pair.

Accepted Answer

The answer of Show the hydrogen bonding which occurs when...

Question 4

What are stacking interactions in DNA and what purpose do they serve?

Accepted Answer

Stacking interactions are weak attractiv

Question 5

Draw the structure of dTTP.

Accepted Answer

The answer of Draw the structure of dTTP....

Question 6

Identify the sugar and the base in the structure below.

Accepted Answer

b-D-2-deox

Question 7

Which of the following constitutes the primary structure of a nucleic acid?

Accepted Answer

A) the sequence of the bases in the strand 
B) the sequence of the riboses in the strand 
C) the sequence of the deoxyriboses in the strand 
D) the sequence of the phosphodiesters in the strand 
E) the sequence of the 5'-OH groups in the strand 
A) the sequence of the bases in the strand 
B) the sequence of the riboses in the strand 
C) the sequence of the deoxyriboses in the strand 
D) the sequence of the phosphodiesters in the strand 
E) the sequence of the 5'-OH groups in the strand

Question 8

Draw the structure of AMP.

Accepted Answer

The answer of Draw the structure of AMP....

Question 9

Which of the following reactions converts nucleotide subunits into nucleic acids?

Accepted Answer

A) nucleophilic attack on the α-phosphorus of ATP 
B) nucleophilic attack on the β-phosphorus of ATP 
C) nucleophilic attack on the γ-phosphorus of ATP 
D) A and B 
E) A, B and C 
A) nucleophilic attack on the α-phosphorus of ATP 
B) nucleophilic attack on the β-phosphorus of ATP 
C) nucleophilic attack on the γ-phosphorus of ATP 
D) A and B 
E) A, B and C

Question 10

Draw the structure of UMP.

Accepted Answer

The answer of Draw the structure of UMP....

Question 11

Which of the following are known as pyrimidines?

Accepted Answer

A) cytosine and thymine 
B) adenine and cytosine 
C) adenine and thymine 
D) guanine and thymine 
E) adenine and guanine 
A) cytosine and thymine 
B) adenine and cytosine 
C) adenine and thymine 
D) guanine and thymine 
E) adenine and guanine

Question 12

Give the maximum number of different codons possible.

Accepted Answer

A) 56 
B) 60 
C) 64 
D) 70 
E) 76 
A) 56 
B) 60 
C) 64 
D) 70 
E) 76

Question 13

Draw the structure of guanosine.

Accepted Answer

The answer of Draw the structure of guanosine....

Question 14

What is a codon? Give an example.

Accepted Answer

A codon is a sequence of three

Question 15

Methionine is the first amino acid incorporated into the heptapeptide specified by the following mRNA:
5'-AUGGACCCCGUUAUUAAACAC-3'.
What is the sequence of the amino acid in the heptapeptide?

Accepted Answer

Using the genetic co

Question 16

List the number of pairs of chromosomes in a human.

Accepted Answer

A) 18 pairs of chromosomes 
B) 20 pairs of chromosomes 
C) 23 pairs of chromosomes 
D) 25 pairs of chromosomes 
E) 27 pairs of chromosomes 
A) 18 pairs of chromosomes 
B) 20 pairs of chromosomes 
C) 23 pairs of chromosomes 
D) 25 pairs of chromosomes 
E) 27 pairs of chromosomes

Question 17

Name the compound.

Accepted Answer

uridine 5'

Question 18

Show the hydrogen bonding which occurs when adenine and thymine form a base pair.

Accepted Answer

The answer of Show the hydrogen bonding which occurs when...

Question 19

Assuming that the human genome with its 3 billion base pairs is entirely in a b-helix, how long is the DNA in a human cell?

Accepted Answer

Recall that b-DNA has 10 base

Question 20

Draw the structure of cytidine 5'-phosphate.

Accepted Answer

The answer of Draw the structure of cytidine 5'-phosphate....

Exam 26: Nucleosides, Nucleotides, and Nucleic Acids

In an entire DNA strand, what percentage consists of genetic information and what percentage consists of introns?

What is a nucleoside? Give an example.

Show the hydrogen bonding which occurs when guanine and cytosine form a base pair.

What are stacking interactions in DNA and what purpose do they serve?

Draw the structure of dTTP.

Identify the sugar and the base in the structure below.

Which of the following constitutes the primary structure of a nucleic acid?

Draw the structure of AMP.

Which of the following reactions converts nucleotide subunits into nucleic acids?

Draw the structure of UMP.

Which of the following are known as pyrimidines?

Give the maximum number of different codons possible.

Draw the structure of guanosine.

What is a codon? Give an example.

Methionine is the first amino acid incorporated into the heptapeptide specified by the following mRNA: 5'-AUGGACCCCGUUAUUAAACAC-3'. What is the sequence of the amino acid in the heptapeptide?

List the number of pairs of chromosomes in a human.

Name the compound.

Show the hydrogen bonding which occurs when adenine and thymine form a base pair.

Assuming that the human genome with its 3 billion base pairs is entirely in a b-helix, how long is the DNA in a human cell?

Draw the structure of cytidine 5'-phosphate.

Remembering General Chemistry: Electronic Structure and Bonding

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds

Isomers: the Arrangement of Atoms in Space

Alkenes Thermodynamics and Kinetics

Reactions of Alkenes

Reactions of Alkynes Introduction to Multistep Synthesis

Electron Delocalization, Resonance, and Aromaticity More About Molecular Orbital Theory

Substitution Reactions of Alkyl Halides

Elimination Reactions of Alkyl Halides Competition Between Substitution and Elimination

Reactions of Alcohols, Ethers, Epoxides, and Sulfur-Containing Compounds

Organometallic Compounds

Reactions of Alkanes, Radicals

Mass Spectrometry, Infrared Spectroscopy, and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Alpha Carbon of Carbonyl Compounds

Reactions of Benzene and Substituted Benzenes

More About Amines Heterocylic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Catalysis

The Organic Mechanisms of the Coenzymes

The Chemistry of Metabolism

Synthetic Polymers

Pericyclic Reactions

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