BIO 235 Exam 3 Study Guide (Ch 10-14) Questions
and Answers
The genetic material of HIV consists of _____. - Answer-single stranded RNA
/.Which of these binds to receptor molecules on the host cell membrane? - Answer-A
/.What is the function of reverse transcriptase? - Answer-It catalyzes the formation of
DNA from an RNA template.
/.What is the source of a viral envelope? - Answer-host cell membrane
/.Which of these is reverse transcriptase? - Answer-C
/.Which of these is the viral genome? - Answer-E
/.Double-stranded viral DNA is incorporated into a host cell as a _____. - Answer-
provirus
/.Which of the following is NOT a characteristic of living things? - Answer-creating
energy
/.Homeostasis is a living organism's - Answer-ability to maintain constant internal
conditions even when environmental conditions change.
/.Which of the following can be found in bacteria, but not viruses? - Answer-a cell
membrane
/.Viruses are - Answer-not alive because they are not made of cells and require a host
cell for reproduction.
/.Which of the following statements about viruses is FALSE? - Answer-The widespread
use of antibiotics has led to resistant strains of viruses.
/.How would you test to see whether a particular influenza vaccine protects elderly
people from influenza? - Answer-Follow tens of thousands of people over the age of 65
during flu seasons and record illnesses and vaccination status.
/.The characteristic of the human immunodeficiency virus (HIV) that makes it different
from other RNA viruses is that it __________. - Answer-can synthesize DNA from an
RNA template
/.What type of infectious agent causes Creutzfeldt-Jakob disease in humans? - Answer-
a prion
, /.In a DNA double helix an adenine of one strand always pairs with a(n) _____ of the
complementary strand, and a guanine of one strand always pairs with a(n) _____ of the
complementary strand. - Answer-thymine ... cytosine
/.After DNA replication is completed, _____. - Answer-each new DNA double helix
consists of one old DNA strand and one new DNA strand
/.The first step in the replication of DNA is catalyzed by _____. - Answer-helicase
/.The action of helicase creates _____. - Answer-replication forks and replication
bubbles
/.Why is the new DNA strand complementary to the 3' to 5' strands assembled in short
segments? - Answer-DNA polymerase can assemble DNA only in the 5' to 3' direction
/.BioFlix Activity: DNA Replication -- DNA Replication Diagram - Answer-Drag the labels
onto the diagram to identify the components of replicating DNA strands.
/.What do DNA and RNA have in common? - Answer-Both are composed of
nucleotides.
/.The DNA polynucleotide structure contains which one of the following? - Answer-
adenine, guanine, cytosine, and thymine
/.This enzyme helps to create mRNA using the information in DNA. - Answer-RNA
polymerase
/.This molecule takes information from DNA out to the cytoplasm. - Answer-mRNA
/.This is the "workbench" where the polypeptide chain is made. - Answer-ribosome
/.This molecule has an anticodon that specifies a particular amino acid, which it delivers
to the growing polypeptide chain. - Answer-tRNA
/.This 3-base subunit on mRNA enables tRNA to deliver the correct amino acid to the
growing polypeptide chain. - Answer-codon
/.. Although generally not considered to be alive, a ____________ is studied alongside
other microbes such as bacteria. - Answer-virus
/.The ____________ is a viral life cycle that results in bursting of the host cell. - Answer-
lytic cycle
/.A ____________ is a viral genome that has inserted itself into the genome of its host. -
Answer-prophage
and Answers
The genetic material of HIV consists of _____. - Answer-single stranded RNA
/.Which of these binds to receptor molecules on the host cell membrane? - Answer-A
/.What is the function of reverse transcriptase? - Answer-It catalyzes the formation of
DNA from an RNA template.
/.What is the source of a viral envelope? - Answer-host cell membrane
/.Which of these is reverse transcriptase? - Answer-C
/.Which of these is the viral genome? - Answer-E
/.Double-stranded viral DNA is incorporated into a host cell as a _____. - Answer-
provirus
/.Which of the following is NOT a characteristic of living things? - Answer-creating
energy
/.Homeostasis is a living organism's - Answer-ability to maintain constant internal
conditions even when environmental conditions change.
/.Which of the following can be found in bacteria, but not viruses? - Answer-a cell
membrane
/.Viruses are - Answer-not alive because they are not made of cells and require a host
cell for reproduction.
/.Which of the following statements about viruses is FALSE? - Answer-The widespread
use of antibiotics has led to resistant strains of viruses.
/.How would you test to see whether a particular influenza vaccine protects elderly
people from influenza? - Answer-Follow tens of thousands of people over the age of 65
during flu seasons and record illnesses and vaccination status.
/.The characteristic of the human immunodeficiency virus (HIV) that makes it different
from other RNA viruses is that it __________. - Answer-can synthesize DNA from an
RNA template
/.What type of infectious agent causes Creutzfeldt-Jakob disease in humans? - Answer-
a prion
, /.In a DNA double helix an adenine of one strand always pairs with a(n) _____ of the
complementary strand, and a guanine of one strand always pairs with a(n) _____ of the
complementary strand. - Answer-thymine ... cytosine
/.After DNA replication is completed, _____. - Answer-each new DNA double helix
consists of one old DNA strand and one new DNA strand
/.The first step in the replication of DNA is catalyzed by _____. - Answer-helicase
/.The action of helicase creates _____. - Answer-replication forks and replication
bubbles
/.Why is the new DNA strand complementary to the 3' to 5' strands assembled in short
segments? - Answer-DNA polymerase can assemble DNA only in the 5' to 3' direction
/.BioFlix Activity: DNA Replication -- DNA Replication Diagram - Answer-Drag the labels
onto the diagram to identify the components of replicating DNA strands.
/.What do DNA and RNA have in common? - Answer-Both are composed of
nucleotides.
/.The DNA polynucleotide structure contains which one of the following? - Answer-
adenine, guanine, cytosine, and thymine
/.This enzyme helps to create mRNA using the information in DNA. - Answer-RNA
polymerase
/.This molecule takes information from DNA out to the cytoplasm. - Answer-mRNA
/.This is the "workbench" where the polypeptide chain is made. - Answer-ribosome
/.This molecule has an anticodon that specifies a particular amino acid, which it delivers
to the growing polypeptide chain. - Answer-tRNA
/.This 3-base subunit on mRNA enables tRNA to deliver the correct amino acid to the
growing polypeptide chain. - Answer-codon
/.. Although generally not considered to be alive, a ____________ is studied alongside
other microbes such as bacteria. - Answer-virus
/.The ____________ is a viral life cycle that results in bursting of the host cell. - Answer-
lytic cycle
/.A ____________ is a viral genome that has inserted itself into the genome of its host. -
Answer-prophage
