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BS 161 EXAM 1
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Exam study book CompTIA A+ Complete Practice Tests of Jeff T. Parker, Quentin Docter - ISBN: 9781119516972 (BS 161 EXAM 1)
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WGU D318 Cloud Applications CompTIA A+ Certification Exam |Core1 CompTIA 220-1001 Total Questions- 426 and answers|
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BS 161 EXAM 1,2,3 AND FINAL BUNDLE NEWEST EXAM1. Based on the primer on scale and approximation, the length of a ribosome is
approximately ____ orders of magnitude smaller than the length of a eukaryotic cell
and approximately ____ orders of magnitude larger than the length of an amino
acid.
a. 3, 2
b. 100, 10
c. 1, 5
d. 0,1 - ANSWER: a. 3, 2
Translation is the process by which:
a. proteins are synthesized from DNA molecules.
b. RNA is synthesized from protein.
c. RNA is synthesized from DNA.
d. DNA is synthesized from protein.
e. proteins are synthesized from RNA molecules. - ANSWER: e. proteins are
synthesized from RNA molecules.
All organisms use which of the following molecules to carry out cellular work such as
growth and moving substances?
a. membranes
b. DNA
c. ATP
d. RNA
e. None of the above - ANSWER: c. ATP
A major difference between eukaryotic cells and prokaryotic cells is that:
a. neither eukaryotic cells nor prokaryotic cells have a nucleus.
b. both eukaryotic cells and prokaryotic cells have a nucleus.
c. prokaryotic cells have a nucleus and eukaryotic cells do not.
d. eukaryotic cells have a nucleus and prokaryotic cells do not. - ANSWER: d.
eukaryotic cells have a nucleus and prokaryotic cells do not.
True or False:
Observations allow scientists to draw tentative explanations called hypotheses. -
ANSWER: True
,Which of the following is NOT a key feature of individual cells?
a. the presence of a plasma membrane
b. the ability to store and transit information using nucleic acids
c. the presence of a nucleus
d. the ability to harvest and transform energy from the environment - ANSWER: c.
the presence of a nucleus
Nucleic acids are important information storage molecules present in virtually every
cell. Which of the following process are carried out by a cell when it accesses that
information in the DNA of the genes?
a. DNA replication and translation
b. DNA replication and transcription
c. transcription and translation - ANSWER: c. transcription and translation
The energy before a chemical reaction and the energy after a chemical reaction is
the same. This is an example of:
a. The second law of thermodynamics
b. The first law of thermodynamics
c. The scientific method
d. Evolution by natural selection - ANSWER: b. The first law of thermodynamics
If you were to compare the entropy of a dog to that of a bucket of water, which of
the following statement would be TRUE?
a. The entropy of the bucket of water and the entropy of the dog would be equal.
b. The entropy of the dog would be greater.
c. The entropy of the bucket of water would be greater. - ANSWER: c. The entropy of
the bucket of water would be greater.
Imagine that a researcher claimed to have created a genetically modified plant that
produces twice as much energy as it harnesses from its environment. How could this
be possible?
a. The researcher has found a way to decrease the overall entropy of the plant.
, b. The researcher has inserted a mutation into the plant's genome that causes twice
the amount of ATP to be produced.
c. The researcher has likely doubled the amount of DNA present in the plant's
genome.
d. The researcher has inserted genes into the plant's genome that increase the
amount of work the plant is capable of performing.
e. This is not possible because such a plant would violate the second law of
thermodynamics. - ANSWER: e. This is not possible because such a plant would
violate the second law of thermodynamics.
The three main groups, or domains, of organisms are:
a. bacteria, archaea, and eukaryotes.
b. animals, plants, and fungi.
c. bacteria, archaea, and prokaryotes.
d. animals, plants, and bacteria.
e. animals, plants, and protists. - ANSWER: a. bacteria, archaea, and eukaryotes.
A mutation in _____ results in a change in _____ that sometimes produces a(n)
_____ with altered structure and function.
a. protein; RNA; DNA
b. protein; DNA; RNA
c. DNA; RNA; protein
d. RNA; DNA; protein
e. RNA; protein; DNA - ANSWER: c. DNA; RNA; protein
Which one of the following entities does NOT possess the ability to synthesize its
own proteins?
a. a bacterial cell
b. a human cell, a virus, & a bacterial cell
c. a viral particle & a bacterial cell
d. a virus
e. a human cell - ANSWER: d. a virus
In which of the following domains do the cells store their genetic information in a
nucleus?
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