Question 1

Who noted that A:T and G:C ratios in DNA are approximately 1:1?

Accepted Answer

A)  James Watson 
B)  Rosalind Franklin 
C)  Erwin Chargaff 
D)  Francis Crick 
E)  None of the answers is correct. 
A)  James Watson 
B)  Rosalind Franklin 
C)  Erwin Chargaff 
D)  Francis Crick 
E)  None of the answers is correct.

Question 2

mRNAs of higher organisms are formed by splicing together _________________ after removal of intervening sequences.

Accepted Answer

The answer of mRNAs of higher organisms are formed by...

Question 3

What are the characteristics of Z-DNA and what does the Z in Z-DNA stand for?

Accepted Answer

Z-DNA is a double helix that i

Question 4

The feature(s) of DNA deduced by Watson and Crick included

Accepted Answer

A)  two antiparallel polynucleotide chains coiled in a helix around a common axis. 
B)  the pyrimidine and purine bases lie on the inside of the helix. 
C)  the bases are nearly perpendicular to the axis. 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  two antiparallel polynucleotide chains coiled in a helix around a common axis. 
B)  the pyrimidine and purine bases lie on the inside of the helix. 
C)  the bases are nearly perpendicular to the axis. 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Question 5

What are the minimal components required for DNA replication?

Accepted Answer

DNA replication requires DNA template; a

Question 6

Features of the genetic code include

Accepted Answer

A)  a codon is defined by three bases. 
B)  the code overlaps. 
C)  the code is degenerate. 
D)  a codon is defined by three bases and the code is degenerate. 
E)  a codon is defined by three bases and the code overlaps. 
A)  a codon is defined by three bases. 
B)  the code overlaps. 
C)  the code is degenerate. 
D)  a codon is defined by three bases and the code is degenerate. 
E)  a codon is defined by three bases and the code overlaps.

Question 7

________________molecules participate in the splicing of mRNA.

Accepted Answer

The answer of ________________molecules participate in the splicing of mRNA....

Question 8

Draw the hydrogen-bonded base pairs of A to T and show why A does not hydrogen bond to C.

Accepted Answer

The answer of Draw the hydrogen-bonded base pairs of A...

Question 9

Stop codons are read by

Accepted Answer

A)  initiation factors 
B)  transcription factors 
C)  release factors 
D)  elongation factors 
E)  None of the answers is correct. 
A)  initiation factors 
B)  transcription factors 
C)  release factors 
D)  elongation factors 
E)  None of the answers is correct.

Question 10

Ribosomes are composed of

Accepted Answer

A)  DNA. 
B)  rRNA. 
C)  protein. 
D)  DNA and rRNA. 
E)  rRNA and protein. 
A)  DNA. 
B)  rRNA. 
C)  protein. 
D)  DNA and rRNA. 
E)  rRNA and protein.

Question 11

What is the nucleotide sequence on the DNA template strand that yields the CUA codon for leucine?

Accepted Answer

A)  AUC 
B)  TAG 
C)  CTA 
D)  GAT 
E)  CUA 
A)  AUC 
B)  TAG 
C)  CTA 
D)  GAT 
E)  CUA

Question 12

In DNA and RNA synthesis, the new strand growth is always in the ___________ direction.

Accepted Answer

The answer of In DNA and RNA synthesis, the new...

Question 13

What is a consensus sequence?

Accepted Answer

A consensus sequence is a common sequenc

Question 14

The phenomenon that stacked bases in double-helical DNA absorb less UV light than the unstacked bases in single-stranded DNA is referred to as _________________.

Accepted Answer

hypochromi

Question 15

In what type of organisms can genetic information flow from RNA to DNA?

Accepted Answer

A)  bacteria 
B)  viruses 
C)  cyanobacteria 
D)  archaea 
E)  None of the answers is correct. 
A)  bacteria 
B)  viruses 
C)  cyanobacteria 
D)  archaea 
E)  None of the answers is correct.

Question 16

What are the common promoter regions found in bacterial genes?

Accepted Answer

A)  a Hogness box at about -10 and a -35 region 
B)  a TATA box at about -25 and a CAAT box at about -75 
C)  a Pribnow box at about -10 and a TATA box at about -25 
D)  a TATA box at about -25 and a -35 region 
E)  None of the answers is correct. 
A)  a Hogness box at about -10 and a -35 region 
B)  a TATA box at about -25 and a CAAT box at about -75 
C)  a Pribnow box at about -10 and a TATA box at about -25 
D)  a TATA box at about -25 and a -35 region 
E)  None of the answers is correct.

Question 17

How does RNA polymerase differ from DNA polymerase?

Accepted Answer

Although similar in many respe

Question 18

What is the approximate error rate in DNA replication?

Accepted Answer

A)  1 *10 - 8  
B)  1 *10 - 5  
C)  1 *10 - 14  
D)  1 * 10 - 11  
E)  None of the answers are correct. 
A)  1 *10 - 8  
B)  1 *10 - 5  
C)  1 *10 - 14  
D)  1 * 10 - 11  
E)  None of the answers are correct.

Question 19

How does a nucleotide differ from a nucleoside?

Accepted Answer

A)  Nucleosides are found in DNA, whereas nucleotides are found in RNA. 
B)  Purines are only found in nucleotides. 
C)  Nucleosides contain only deoxyribose sugars. 
D)  A nucleotide is a nucleoside with a phosphate ester linked to the sugar. 
E)  None of the answers is correct. 
A)  Nucleosides are found in DNA, whereas nucleotides are found in RNA. 
B)  Purines are only found in nucleotides. 
C)  Nucleosides contain only deoxyribose sugars. 
D)  A nucleotide is a nucleoside with a phosphate ester linked to the sugar. 
E)  None of the answers is correct.

Question 20

The nucleoside that is composed of a D-ribose linked to a cytosine base is called __________________.

Accepted Answer

The answer of The nucleoside that is composed of a...

Exam 4: DNA, RNA, and the Flow of Genetic Information

Who noted that A:T and G:C ratios in DNA are approximately 1:1?

mRNAs of higher organisms are formed by splicing together _________________ after removal of intervening sequences.

What are the characteristics of Z-DNA and what does the Z in Z-DNA stand for?

The feature(s) of DNA deduced by Watson and Crick included

What are the minimal components required for DNA replication?

Features of the genetic code include

________________molecules participate in the splicing of mRNA.

Draw the hydrogen-bonded base pairs of A to T and show why A does not hydrogen bond to C.

Stop codons are read by

Ribosomes are composed of

What is the nucleotide sequence on the DNA template strand that yields the CUA codon for leucine?

In DNA and RNA synthesis, the new strand growth is always in the ___________ direction.

What is a consensus sequence?

The phenomenon that stacked bases in double-helical DNA absorb less UV light than the unstacked bases in single-stranded DNA is referred to as _________________.

In what type of organisms can genetic information flow from RNA to DNA?

What are the common promoter regions found in bacterial genes?

How does RNA polymerase differ from DNA polymerase?

What is the approximate error rate in DNA replication?

How does a nucleotide differ from a nucleoside?

The nucleoside that is composed of a D-ribose linked to a cytosine base is called __________________.

Biochemistry: an Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters