BIO 116 EXAM 1 TEST PAPER COMPLETE
SOLUTIONS AND ACCURATE RESPONSES
●● identify which of the following describes a monophyletic group
1. a common ancestor and some of its descendants
2. a common ancestor and all of its descendants
3. several groups that do not share a common ancestor
Answer: 2 only
●● a phylogenetic tree is a diagram that represents
a. a theory that explains how life began
b. the pattern of descent of a group of organisms
c. a prediction of future evolutionary events
d. the relationships between species based on their morphological
similarity
Answer: b
●● compare and contrast the lytic and lysogenic replication cycle of
bacteriophages. which of the following statements accurately describe
BOTH?
a. the host cell is lysed
b. new virus assemble
,c. the bacteriophage genome is replicated
d. a prophage forms
Answer: c
●● correctly sequence the lytic cycle of bacteriophage replication
1. lysis of host cell
2. virus attaches to host cell
3. viral genome enters host cell
4. assembly of new viruses
5. viral gene expression and genome replication
Answer: 2 -> 3 -> 5 -> 4 -> 1
●● identify the statement which correctly describes a component of a
virus
a. an envelope is acquired from the host cell wall
b. the capsid consists of carbohydrates
c. a capsomere contains the information necessary for replication
d. the genetic material is either DNA or RNA
Answer: d
●● identify which of the following would NOT occur during the lytic
sequence of viral reproduction
a. phage proteins are synthesized
,b. phage DNA synthesized
c. prophage is integrated into bacterial chromosome
d. phase injects its DNA into host cell
Answer: c
●● which of the following is/are TRUE regarding bacterial reproduction
1. mutations are the only source of genetic diversity
2. meiosis is the primary mechanism of sexual reproduction
3. gametes are produced under ideal environmental conditions
4. most bacteria divide through binary fission
Answer: 4 only
●● mutations will most likely lead to a rapid increase in genetic
variation in a population with ________________ generation time and
_______________ population size
a. short; large
b. long; large
c. unpredictable; large
d. short; small
Answer: a
●● during bacterial conjugation, a donor cell extends a plus that attaches
to a recipient cell. what is the next step in the process
, a. the bacterial chromosome is transferred into the recipient
b. the donor cell dies following the transfer
c. a phage is transferred from the host to the recipient cell
d. a strand of the plasmid DNA enters the recipient cell
Answer: c
●● compare and contrast viruses, bacteria, and humans. which of the
following are shared by all three
1. peptidoglycan
2. genetic material
3. protein
4. ribosomes
5. mitochondria
Answer: 2 and 3
●● correctly sequence the process of evolution by natural selection in a
population of bacteria exposed to antibiotics
1. antibiotics introduce
2. resistant bacteria survive and reproduce
3. individual variation exists in population
4. frequency of resistance alleles in population increases
Answer: 3 -> 1 -> 2 -> 4
SOLUTIONS AND ACCURATE RESPONSES
●● identify which of the following describes a monophyletic group
1. a common ancestor and some of its descendants
2. a common ancestor and all of its descendants
3. several groups that do not share a common ancestor
Answer: 2 only
●● a phylogenetic tree is a diagram that represents
a. a theory that explains how life began
b. the pattern of descent of a group of organisms
c. a prediction of future evolutionary events
d. the relationships between species based on their morphological
similarity
Answer: b
●● compare and contrast the lytic and lysogenic replication cycle of
bacteriophages. which of the following statements accurately describe
BOTH?
a. the host cell is lysed
b. new virus assemble
,c. the bacteriophage genome is replicated
d. a prophage forms
Answer: c
●● correctly sequence the lytic cycle of bacteriophage replication
1. lysis of host cell
2. virus attaches to host cell
3. viral genome enters host cell
4. assembly of new viruses
5. viral gene expression and genome replication
Answer: 2 -> 3 -> 5 -> 4 -> 1
●● identify the statement which correctly describes a component of a
virus
a. an envelope is acquired from the host cell wall
b. the capsid consists of carbohydrates
c. a capsomere contains the information necessary for replication
d. the genetic material is either DNA or RNA
Answer: d
●● identify which of the following would NOT occur during the lytic
sequence of viral reproduction
a. phage proteins are synthesized
,b. phage DNA synthesized
c. prophage is integrated into bacterial chromosome
d. phase injects its DNA into host cell
Answer: c
●● which of the following is/are TRUE regarding bacterial reproduction
1. mutations are the only source of genetic diversity
2. meiosis is the primary mechanism of sexual reproduction
3. gametes are produced under ideal environmental conditions
4. most bacteria divide through binary fission
Answer: 4 only
●● mutations will most likely lead to a rapid increase in genetic
variation in a population with ________________ generation time and
_______________ population size
a. short; large
b. long; large
c. unpredictable; large
d. short; small
Answer: a
●● during bacterial conjugation, a donor cell extends a plus that attaches
to a recipient cell. what is the next step in the process
, a. the bacterial chromosome is transferred into the recipient
b. the donor cell dies following the transfer
c. a phage is transferred from the host to the recipient cell
d. a strand of the plasmid DNA enters the recipient cell
Answer: c
●● compare and contrast viruses, bacteria, and humans. which of the
following are shared by all three
1. peptidoglycan
2. genetic material
3. protein
4. ribosomes
5. mitochondria
Answer: 2 and 3
●● correctly sequence the process of evolution by natural selection in a
population of bacteria exposed to antibiotics
1. antibiotics introduce
2. resistant bacteria survive and reproduce
3. individual variation exists in population
4. frequency of resistance alleles in population increases
Answer: 3 -> 1 -> 2 -> 4
