review QUESTION 1 Various species of fungi can be used to do all of the followin
ID: 220135 • Letter: R
Question
review
QUESTION 1
Various species of fungi can be used to do all of the following except:?
.
.
. study genes similar to those that cause genetic diseases in humans
.
.
. produce antibiotics
.
.
. produce biofuels
.
.
. make certain kinds of cheese
.
.
. make agar as a medium in petri dishes
. ??
QUESTION 2
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis, what features might we expect these organelles to contain??
.
.
. a plasma membrane, nucleus, and cilia
.
.
. a plasma membrane, DNA, and ribosomes
.
.
. DNA, a nucleus, and ribosomes
.
.
. a nucleus, ribosomes, and cilia
.
.
. a plasma membrane, nucleus, and ribosomes
. ??
QUESTION 3
One of the most significant beneficial roles of protists in the biosphere is their action as:?
.
.
. predators
.
.
. producers
.
.
. pathogens
.
.
. decomposers
.
.
. consumers
. ??
QUESTION 4
Which of the following is true of archaeans??
.
.
. They are easily cultured in the lab.
.
.
. They are very common and are found in all environments.
.
.
. They exist only as symbionts within other organisms.
.
.
. Most of them are extremophiles.
. ??
QUESTION 5
Which of the following is true of mycorrhizae??
.
.
. They are parasitic on plants, deriving their energy from digesting and absorbing plant tissues.
.
.
. They fix atmospheric nitrogen, making it available to plants.
.
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. Only a few vascular plants have mycorrhizae, but these include important food crops such as wheat and corn.
.
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. They make phosphate available to plants and increase surface area for water absorption
. ??
QUESTION 6
Some archaeans are extremophiles, such as those that survive very high temperatures or extremely salty conditions. An archaean that can survive a very low pH might be called a/n:?
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. thermophile
.
.
. alkalophile
.
.
. acidophile
.
.
. methanogen
.
.
. halophile
. ??
QUESTION 7
Many protists such as dinoflagellates, stramenopiles, and euglenids contain plastids that have three or even four membranes, as well as DNA similar to that of cyanobacteria. A hypothesis that explains these characeristics is:?
.
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. transformation
.
.
. conjugation
.
.
. binary fission
.
.
. transduction
.
.
. endosymbiosis
. ??
QUESTION 8
Suppose you are involved in research investigating the cause of an emergent disease that impairs the function of nervous tissue. You wish to begin by isolating the pathogen. To do this, you extract DNA and RNA from infected nervous tissue so you can determine whether the pathogen is closely related to any known pathogens. To your surprise, you find that the extracted DNA and RNA belong only to the host. Given this result, which of the following conclusions could you most appropriately make??
.
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. The disease may be caused by a prion.
.
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. The disease may be caused by a protist.
.
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. The disease may be caused by a fungus.
.
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. The disease may be caused by a virus.
.
.
. The disease may be caused by a viroid.
. ??
QUESTION 10
Occasionally, bacterial DNA is transferred from one cell to another by a bacteriophage. This process is called:?
.
.
. transduction
.
.
. replication
.
.
. conjugation
.
.
. transformation
.
.
. binary fission
. ??
QUESTION 11
Suppose that you are treating a patient who has a bacterial infection that is highly resistant to antibiotic treatment. Which of the following traits is this bacterial strain likely to possess??
.
.
. Gram negative
.
.
. endospore
.
.
. capsule
.
.
. all of these traits are likely in antibiotic-resistant bacteria
.
.
. R-plasmid (plasmid with resistance genes)
. ??
QUESTION 12
Imagine that you are treating patients with a serious viral infection. You determine that the patients' immune system is unable to easily detect the presence of the virus, and so you conclude that the virus is most likey possesses which of the following features??
.
.
. a capsid
.
.
. a membranous envelope
.
.
. a reverse transcriptase enzyme
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.
. an RNA genome
.
.
. a DNA genome
. ??
QUESTION 14
Which of the following structures is NOT included in any virus?
.
.
. capsid proteins
.
.
. RNA
.
.
. cytoplasm
.
.
. membranous envelope
.
.
. DNA
. ??
QUESTION 16
Certain fungi form mutualistic symbioses with a photosynthetic partner such as a protist or cyanobacterium. These are commonly known as _________________.?
.
.
. mycelia
.
.
. parasites
.
.
. lichens
.
.
. mycorrhizae
.
.
. hyphae
. ??
QUESTION 17
Multicellular fungi are made up of numerous thin filaments called: ?
.
.
. spores
.
.
. mycelia
.
.
. gills
.
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. hyphae
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. mushrooms
. ??
QUESTION 18
The food-absorbing part of a fungus (as opposed to the reproductive structure) is called the:
.
.
. hyphae
.
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. spores
.
.
. mycorrhizae
.
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. mushrooms
.
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. mycelium
. ??
QUESTION 19
Which of the following is a trait shared by prokaryotes and eukaryotes, but not by viruses??
.
.
. nucleic acids used to store hereditary information
.
.
. complex and ordered arrangements of macromolecules
.
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. the capacity to evolve
.
.
. the ability to process energy through metabolic reactions
. ??
QUESTION 20
Which of the following is NOT a difference between Archaea and Bacteria?
.
.
. presence of peptidoglycan
.
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. inhibition by the antibiotics chloramphenicol and streptomycin
.
.
. presence of histones in DNA
.
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. presence of introns in genes
.
.
. lack of a nucleus
. ??
QUESTION 21
It is thought that many protists evolved from a symbiotic relationship that formed when a heterotrophic eukaryote engulfed a prokaryote. This process is called:?
.
.
. commensalism
.
.
. transduction
.
.
. conjugation
.
.
. endosymbiosis
.
.
. transformation
. ??
QUESTION 22
Which of the following is NOT a role of bacteria in the ecosystem??
.
.
. producers
.
.
. decomposers
.
.
. symbionts
.
.
. all of these are roles of bacteria
.
.
. pathogens
. ??
QUESTION 23
The cell walls of fungi are composed of:
.
.
. chitin
.
.
. lipopolysaccharides
.
.
. protein
.
.
. cellulose
.
.
. peptidoglycan
. ??
.
.
. study genes similar to those that cause genetic diseases in humans
.
.
. produce antibiotics
.
.
. produce biofuels
.
.
. make certain kinds of cheese
.
.
. make agar as a medium in petri dishes
Explanation / Answer
Various species of fungi can be used to do all of the following except:
The answer is make agar as a medium in petri dishes, because agar is extracted from the red alage.
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis, what features might we expect these organelles to contain?
The answer is a plasma membrane, DNA, and ribosomes
One of the most significant beneficial roles of protists in the biosphere is their action as:
The answer is producers because the alage is included in the protists. The alage is the main producer the earth which occupaies almost 98% of the total photosynthesis.
Which of the following is true of archaeans?
The answer is They are very common and are found in all environments.
The archaeans is common microbes which account almost 20% of the total microbial fauna...
Which of the following is true of mycorrhizae?
The answer is They make phosphate available to plants and increase surface area for water absorption
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