Question 1

Topoisomerasesــــــــــــــــــــــــــــــــــ .

Accepted Answer

A) are antibiotics that kill bacterial cells 
B) bend DNA 
C) change the level of supercoiling in DNA 
D) repair DNA 
A) are antibiotics that kill bacterial cells 
B) bend DNA 
C) change the level of supercoiling in DNA 
D) repair DNA C

Question 2

The most common form of DNA is A-DNA.

Accepted Answer

A) True 
 B)False  False

Question 3

Homologous chromosomesــــــــــــــــــــــــــ .

Accepted Answer

A) are the same length 
B) have the same genes at the same loci 
C) pair up during cell division 
D) are all of the above. 
A) are the same length 
B) have the same genes at the same loci 
C) pair up during cell division 
D) are all of the above. D

Question 4

Alu elements represent ــــــــــــــــــــــــof the human genome.

Accepted Answer

A) less than 1% 
B) 4-5% 
C) 6-8% 
D) more than 10% 
A) less than 1% 
B) 4-5% 
C) 6-8% 
D) more than 10%

Question 5

The melting temperature of DNA is the temperature at which ـــــــــــــــــــ.

Accepted Answer

A) half of the two strands are separated. 
B) the two DNA strands are completely separated. 
C) the DNA is completely degraded. 
D) half of the DNA is degraded. 
A) half of the two strands are separated. 
B) the two DNA strands are completely separated. 
C) the DNA is completely degraded. 
D) half of the DNA is degraded.

Question 6

The form of DNA that consists of a triple helix promoted by acid conditions and runs of purine bases is calledـــــــــــــــــــــــــ .

Accepted Answer

A) H-DNA 
B) Z-DNA 
C) A-DNA 
D) B-DNA 
A) H-DNA 
B) Z-DNA 
C) A-DNA 
D) B-DNA

Question 7

Compared to the other answers listed,which is the least compacted structure?

Accepted Answer

A) DNA double helix 
B) chromatid 
C) 30 nm fiber 
D) nucleosome 
A) DNA double helix 
B) chromatid 
C) 30 nm fiber 
D) nucleosome

Question 8

All of the following describe Z-DNA except ـــــــــــــــــــــــــ.

Accepted Answer

A) left-handed helix 
B) 12 base pairs per turn 
C) acid conditions 
D) GC- or GT-rich tracts 
A) left-handed helix 
B) 12 base pairs per turn 
C) acid conditions 
D) GC- or GT-rich tracts

Question 9

DNA wrapped around histones are calledــــــــــــــــــــــــ .

Accepted Answer

A) chromatids 
B) nucleosomes 
C) heterochromatin 
D) 300 nm fibers 
A) chromatids 
B) nucleosomes 
C) heterochromatin 
D) 300 nm fibers

Question 10

Type II topoisomerases ـــــــــــــــــــــــــ.

Accepted Answer

A) break both strands of DNA 
B) include DNA gyrase,for example 
C) change the linking number in steps of two 
D) are all of the above 
A) break both strands of DNA 
B) include DNA gyrase,for example 
C) change the linking number in steps of two 
D) are all of the above

Question 11

A large amount of satellite DNA is foundـــــــــــــــــــــــ .

Accepted Answer

A) in euchromatin 
B) around the centromeres of chromosomes 
C) in loosely packed forms of chromatin 
D) in Alu elements. 
A) in euchromatin 
B) around the centromeres of chromosomes 
C) in loosely packed forms of chromatin 
D) in Alu elements.

Question 12

Which of the following sequences would have the highest melting temperature relative to the others listed?

Accepted Answer

A) 5'-ATATATAT-3' 
B) 5'-GAGAGAGA-3' 
C) 5'-GCGCGCGC-3' 
D) 5'-AAAAAAAA-3' 
A) 5'-ATATATAT-3' 
B) 5'-GAGAGAGA-3' 
C) 5'-GCGCGCGC-3' 
D) 5'-AAAAAAAA-3'

Topoisomerasesــــــــــــــــــــــــــــــــــ .

The most common form of DNA is A-DNA.

Homologous chromosomesــــــــــــــــــــــــــ .

Alu elements represent ــــــــــــــــــــــــof the human genome.

The melting temperature of DNA is the temperature at which ـــــــــــــــــــ.

The form of DNA that consists of a triple helix promoted by acid conditions and runs of purine bases is calledـــــــــــــــــــــــــ .

Compared to the other answers listed,which is the least compacted structure?

All of the following describe Z-DNA except ـــــــــــــــــــــــــ.

DNA wrapped around histones are calledــــــــــــــــــــــــ .

Type II topoisomerases ـــــــــــــــــــــــــ.

A large amount of satellite DNA is foundـــــــــــــــــــــــ .

Which of the following sequences would have the highest melting temperature relative to the others listed?

Cells and Organisms

Basic Genetics

DNA, RNA, and Protein

Manipulation of Nucleic Acids

Polymerase Chain Reaction

Recombinant DNA Technology

DNA Sequencing

Genomics Systems Biology

Cell Division and DNA Replication

Transcription of Genes

Processing of RNA

Protein Synthesis

Protein Structure and Function

Proteomics

Regulation of Transcription in Prokaryotes

Regulation of Transcription in Eukaryotes

Regulation at the RNA Level

Analysis of Gene Expression

Plasmids

Viruses

Mobile DNA

Mutations and Repair

Recombination

Bacterial Genetics

Molecular Evolution

Filters

Exam 4: Genes, genomes, and DNA

Topoisomerasesــــــــــــــــــــــــــــــــــ .

The most common form of DNA is A-DNA.

Homologous chromosomesــــــــــــــــــــــــــ .

Alu elements represent ــــــــــــــــــــــــof the human genome.

The melting temperature of DNA is the temperature at which ـــــــــــــــــــ.

The form of DNA that consists of a triple helix promoted by acid conditions and runs of purine bases is calledـــــــــــــــــــــــــ .

Compared to the other answers listed,which is the least compacted structure?

All of the following describe Z-DNA except ـــــــــــــــــــــــــ.

DNA wrapped around histones are calledــــــــــــــــــــــــ .

Type II topoisomerases ـــــــــــــــــــــــــ.

A large amount of satellite DNA is foundـــــــــــــــــــــــ .

Which of the following sequences would have the highest melting temperature relative to the others listed?

Cells and Organisms

Basic Genetics

DNA, RNA, and Protein

Manipulation of Nucleic Acids

Polymerase Chain Reaction

Recombinant DNA Technology

DNA Sequencing

Genomics Systems Biology

Cell Division and DNA Replication

Transcription of Genes

Processing of RNA

Protein Synthesis

Protein Structure and Function

Proteomics

Regulation of Transcription in Prokaryotes

Regulation of Transcription in Eukaryotes

Regulation at the RNA Level

Analysis of Gene Expression

Plasmids

Viruses

Mobile DNA

Mutations and Repair

Recombination

Bacterial Genetics

Molecular Evolution

Filters