bio 116 exam 1 and 2 questions and answers

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 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/55 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 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/55 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 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/55 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 ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 5/55 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 - Ans:-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 - Ans:-3 - 1 - 2 - 4 identify which of the following materials is the primary compone