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1
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Which of the following microorganisms would find hypotonic conditions
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detrimental?
Select one:
a. Bacteria
b. Protozoa
c. Fungi
d. Algae
e. Cyanobacteria
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Started on February 26, 2021, 1:31 PM
State Finished
Completed on February 26, 2021, 2:31 PM
Time taken 59 mins 54 secs
Grade 100.00 out of 100.00Question
3
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Substrate level phosphorylation occurs in
Select one:
a. Glycolysis and electron transport chain
b. Photosynthesis and glycolysis
c. Glycolysis and Krebs cycle
d. Krebs cycle and electron transport chain
e. All of the choices are correct
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4
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How many carbon dioxide molecules are produced by the complete aerobic
breakdown of one glucose molecule?
Select one:
a. 2
b. 3
c. 4
d. 5
e. 6
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5
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Which is incorrect about inducible operons?
Select one:
a. Have genes turned off by a buildup of end product
b. Are often for catabolic pathways
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The correct answer is: EnzymesThe correct answer is: Have genes turned off by a buildup of end product
Question
8
This molecule is synthesized as a copy of a gene on the DNA template strand
Select one:
a. Ribosomal RNA
d. Are turned on by the substrate of the enzyme
e. Include the lac operon
question
During aerobic cellular respiration, the final electron acceptor is
Select one:
a. Pyruvic acid
b. Oxygen
c. Nitrate
d. Cytochrome c
e. FAD
The correct answer is: OxygenThe development of virulent, toxin-producing bacterial strains due to the
presence of a temperate phage can occur in
Select one:
a. Bacterial conjugation
b. Transformation
c. Generalized transduction
d. Specialized transduction
e. All of the choices are correct
b. Messenger RNA
c. Transfer RNA
d. Primer RNA
e. Ribozymes
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Which enzyme exposes DNA strands prior to the transcription?
Select one:
a. DNA ligases
b. DNA polymerases
c. DNA helicases
d. DNA gyrases
e. Primases
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9
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10
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12
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Organisms called live on or in the body of a host and cause some
degree of harm.
Select one:
a. Mesophiles
b. Thermophiles
c. Commensals
d. Pathogens
e. Halophiles
Question
13
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Enzymes are
Select one:
a. Broken down in reactions that require energy input
b. Proteins that function as catalysts
c. Used up in chemical reactions
d. Not needed for catabolic reactions
e. All of the choices are correct
An organism with a temperature growth range of 45° C to 60° C would be
called a/an
Select one:
a. Extremophile
b. Thermophile
c. Psychrophile
d. Facultative psychrophile
e. Thermoduric
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11
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14
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All of the chemical reactions of the cell are called
Select one:
a. Catabolism
b. Redox reactions
c. Phosphorylation
d. Metabolism
e. Cellular respiration
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15
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A permanent, inheritable change in the genetic information is called a/an
Select one:
a. Translation
b. Transcription
c. Mutation
d. Alteration
e. Regeneration
Question
16
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As
the
electron transport carriers shuttle electrons, they actively pump
into the outer membrane compartment setting up a concentration gradient
called the proton motive force.
Select one:
a. ATPFull induction of the lactose operon requires
Select one:
a. Lactose present
b. Lactose and glucose present
c. Lactose present without glucose
d. Lactose and arabinose present
e. All of the choices induce the lactose operon
b. Phosphate
c. Hydrogen ions
d. Oxygen
e. NADH
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An organism that can exist in both oxygen and oxygen less environments is
a/an
Select one:
a. Aerobe
b. Obligate aerobe
c. Facultative anaerobe
d. Microaerophile
e. Obligate anaerobe
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17
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18
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20
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Replication of DNA begins at a/an
Select one:
a. Guanine-cytosine rich area
b. Uracil-adenine rich area
c. Adenine-thymine rich area
d. Adenine-cytosine rich area
e. Guanine-adenine rich area
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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The movement of substances from lower to higher concentration across a
semi permeable membrane that must have a specific protein carrier and cell
expenditure of energy is called
Select one:
a. Facilitated diffusion
b. Diffusion
c. Active transport
d. Osmosis
e. Endocytosis
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19
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