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Exam (elaborations)

bio 116 exam 1 and 2 questions and answers

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  • BIO 116
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  • BIO 116

bio 116 exam 1 and 2 questions and answers you identify two new organisms that share a specific morphological feature. genetic analysis reveals that each organism uses different protein structure. which of the following are true regarding these organisms 1. the shared feature is analogous 2. ...

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  • October 23, 2024
  • 55
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIO 116
  • BIO 116
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GraceAmelia
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bio 116 exam 1 and 2 questions and
answers

you identify two new organisms that share a specific morphological feature. genetic analysis reveals that

each organism uses different protein structure. which of the following are true regarding these

organisms


1. the shared feature is analogous


2. these organisms represent sister taxa


3. their common ancestor probably did not possess this feature


4. the shared feature is a homologous character - Ans:✔✔-1 and 3


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 - Ans:✔✔-2 only




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FIRST PUBLISH OCTOBER 2024




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 - Ans:✔✔-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 - Ans:✔✔-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

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FIRST PUBLISH OCTOBER 2024




4. assembly of new viruses


5. viral gene expression and genome replication - Ans:✔✔-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 - Ans:✔✔-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 - Ans:✔✔-c


which of the following is/are TRUE regarding bacterial reproduction


1. mutations are the only source of genetic diversity



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FIRST PUBLISH OCTOBER 2024




2. meiosis is the primary mechanism of sexual reproduction


3. gametes are produced under ideal environmental conditions


4. most bacteria divide through binary fission - Ans:✔✔-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 - Ans:✔✔-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 - Ans:✔✔-c


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