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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 EXAMThe language of nucleic acids is converted to the language of amino acids during the
process known as:
a. translation.
b. transcription.
c. central dogma.
d. replication. - ANSWER: a. translation
The first cells were most similar to:
a. eukaryotes.
b. multicellular forms.
c. none
d. viruses.
e. prokaryotes. - ANSWER: e. prokaryotes.
Observations are used by scientists to draw tentative explanations called
hypotheses.
a. false
b. true - ANSWER: b. true
In which of the domains do the cells store their genetic information in a nucleus?
a. Archaea and Bacteria
b. Archaea
c. Eukarya
d. Eukarya and Archaea
e. Bacteria and Eukarya - ANSWER: c. Eukarya
When we say that the cell is the fundamental unit of life, we mean that:
a. a single cell can carry out all life processes.
b. all living things are made up of one or more cells.
c. all of these choices are correct.
d. the smallest entity that can be considered living is a cell.
e. life doesn't exist in the absence of cells. - ANSWER: c. all of these choices are
correct.
Nucleic acids are important information storage molecules present in virtually every
cell. Which of the processes is carried out by a cell when it accesses that information
in the DNA of the genes?
a. DNA replication and transcription
b. transcription and translation
,c. DNA replication and translation - ANSWER: b. transcription and translation
Which process is an example of the first law of thermodynamics in action?
a. Energy is created by cells during ATP synthesis.
b. Some energy is released as heat during metabolic processes.
c. As monomers combine into polymers, the disorder inside the cell decreases.
d. Light energy is transformed into chemical energy during photosynthesis. -
ANSWER: d. Light energy is transformed into chemical energy during photosynthesis.
If you were to compare the entropy of a dog to that of a bucket of water, which of
the statements would be true?
a. The entropy of the bucket of water would be greater.
b. The entropy of the bucket of water and the entropy of the dog would be equal.
c. The entropy of the dog would be greater. - ANSWER: a. The entropy of the bucket
of water would be greater. (To maintain itself as a living organism, the dog (or any
living organism) needs constant input of energy. A bucket of water will remain a
bucket of water without input of energy. In fact, if you add energy to water, it may
change its state to a gas and become even more disordered (exhibit higher
entropy).)
Suppose 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. This is impossible because such a plant would violate the laws of
thermodynamics.
b. The researcher has likely doubled the amount of DNA present in the plant's
genome.
c. The researcher has inserted genes into the plant's genome that increase the
amount of work the plant is capable of performing.
d. The researcher has inserted a mutation into the plant's genome that causes twice
the amount of ATP to be produced.
e. The researcher has found a way to decrease the overall entropy of the plant. -
ANSWER: a. This is impossible because such a plant would violate the laws of
thermodynamics.
The three main groups, or domains, of organisms are:
a. animals, plants, and protists.
b. animals, plants, and fungi.
c. animals, plants, and Bacteria.
d. Bacteria, Archaea, and prokaryotes.
e. Bacteria, Archaea, and Eukarya. - ANSWER: e. Bacteria, Archaea, and Eukarya.
, A mutation in _____ results in a change in _____ that sometimes produces a(n)
_____ with altered structure and function.
a. RNA; protein; DNA
b. RNA; DNA; protein
c. protein; RNA; DNA
d. protein; DNA; RNA
e. DNA; RNA; protein - ANSWER: e. DNA; RNA; protein
Which one of the options by itself does not possess the ability to synthesize its own
proteins?
a. a human cell, a virus, and a bacterial cell
b. a virus
c. a human cell
d. a viral particle and a bacterial cell
e. a bacterial cell - ANSWER: b. a virus
At some point in their life cycle, all cells have a _____, whereas not all cells have a(n)
_____.
a. plasma membrane; nuclear membrane
b. nucleus; cytoplasm
c. nucleus; plasma membrane
d. nucleus; nuclear membrane
e. plasma membrane; RNA or DNA - ANSWER: a. plasma membrane; nuclear
membrane
Which choice correctly pairs the particles of an atom with their physical properties?
a. proton - uncharged; neutron - negatively charged; electron - positively charged
b. proton- positively charged; neutron - negatively charged; electron - uncharged
c. proton - positively charged; neutron - uncharged; electron - negatively charged
d. proton - negatively charged; neutron - uncharged; electron - positively charged -
ANSWER: c. proton - positively charged; neutron - uncharged; electron - negatively
charged
A pair of atoms joined by a polar covalent bond:
a. has the charge spread evenly across both atoms.
b. mixes well with nonpolar solvents.
c. has a slight positive charge on one atom and a slight negative charge on the other.
d. is unlikely to form hydrogen bonds with water. - ANSWER: c. has a slight positive
charge on one atom and a slight negative charge on the other.
The ability of atoms to attract electrons is referred to as:
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