BIO 152 Lab 4 2024 FINAL EXAM
AND ANSWERS
All of the statements below are true of bacteria except
A) bacteria are usually unicellular and have no organelles.
B) bacteria gain genetic diversity through sexual reproduction.
C) bacteria are the simplest life forms on earth.
D) bacteria are the m...
BIO 152 Lab 4 2024 FINAL EXAM
AND ANSWERS
All of the statements below are true of bacteria except
A) bacteria are usually unicellular and have no organelles.
B) bacteria gain genetic diversity through sexual reproduction.
C) bacteria are the simplest life forms on earth.
D) bacteria are the most abundant form of life on earth. - ANSWERSB) bacteria gain
genetic diversity through sexual reproduction
A bacterial cell does not possess
A) ribosomes.
B) a cell wall.
C) a cell membrane.
D) DNA.
E) mitochondria - ANSWERSE) mitochondria
Bacteria and archaea differ from eukaryotes in that
A) eukaryotes have ribosomes; bacteria and archaea lack ribosomes.
B) eukaryotes have chromosomes; bacteria and archaea lack chromosomes.
C) eukaryotes lack a nucleus; bacteria and archaea have a nucleus.
D) eukaryotes have linear chromosomes; bacteria and archaea have circular
chromosomes. - ANSWERSD) eukaryotes have linear chromosomes; bacteria and
archaea have circular chromosomes.
Cyanobacteria
A) can tolerate oxygen.
B) are heterotrophic.
C) absorb reduced organic compounds.
D) are photosynthetic
E) Both A and D - ANSWERSE) Both A and D
What contributes to the fact that bacterial resistance to antibiotics in humans taking
antibiotics can evolve by the general mechanism of natural selection?
A) Antibiotics kill harmless bacteria that would compete with pathogenic bacteria.
B) Chronic low doses of antibiotics select for resistant individuals.
C) Genes for resistance can be easily acquired by bacteria via mutation, plasmids, or
dead bacterial cells.
D) all of the above - ANSWERSD) All of the Above
Over use of antibiotics in medicine and agriculture can be dangerous because
A) many people can't take any antibiotics because of allergies.
B) it may damage natural bacteria found in the soil and air.
, C) it may increase the occurrence of antibiotic resistant bacteria.
D) it may limit the ability of bacteria to produce natural antibiotics. - ANSWERSC) it may
increase the occurrence of antibiotic resistant bacteria.
Suppose you believe that the flies you are studying are having low reproductive
success because the sperm of the males are infected by a bacterium. Which
observation below would best help you prove this hypothesis?
A) When the flies were fed a diet high in cellulose, they grew more slowly.
B) Bacteria from the sperm of the fly had lots of plasmids.
C) When the flies were given antibiotics, their reproductive success improved.
D) The flies had bacteria on their skin and appendages. - ANSWERSC) When the flies
were given antibiotics, their reproductive success improved.
Which of the following is not part of the current definition of a virus?
A) nanometers in size
B) always contain double-stranded DNA
C) intracellular parasite
D) infectious but not alive
E) None of the above, all choices are part of the definition of a virus. - ANSWERSB)
always contain double-stranded DNA
Viral particles begin to reproduce themselves quickly and soon burst out of the host cell
if they are
A) lytic viruses.
B) RNA viruses.
C) retroviruses.
D) lysogenic viruses.
E) plant viruses. - ANSWERSA) lytic viruses.
Many viruses do NOT immediately kill their host cells in order to replicate. This is
known as a
A) lytic cycle. B) lysogenic cycle.
C) cell transformation. D) prophage. - ANSWERSB) lysogenic cycle
All Protista
A) are heterotrophic. B) are autotrophic.
C) have flagella. D) are eukaryotic. - ANSWERSD) are eukaryotic.
Which characteristic is least true for protists?
A) They may be multicellular.
B) They are well adapted to terrestrial life.
C) They can be autotrophic.
D) They are eukaryotic.
E) They can be heterotrophic. - ANSWERSB) They are well adapted to terrestrial life.
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