{"id":132729,"date":"2024-07-29T09:31:52","date_gmt":"2024-07-29T09:31:52","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=132729"},"modified":"2024-07-29T09:31:56","modified_gmt":"2024-07-29T09:31:56","slug":"bs-161-exam-123-and-final-bundle-newest-exam-complete-questions-and-correct-detailed-answers-verified-answers-already-graded-a","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/07\/29\/bs-161-exam-123-and-final-bundle-newest-exam-complete-questions-and-correct-detailed-answers-verified-answers-already-graded-a\/","title":{"rendered":"BS 161 EXAM 1,2,3 AND FINAL BUNDLE NEWEST EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+"},"content":{"rendered":"\n

BS 161 EXAM 1,2,3 AND FINAL BUNDLE NEWEST EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+<\/p>\n\n\n\n

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BS 161 EXAM 1 NEWEST EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
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<\/p>\n\n\n\n

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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.<\/p>\n\n\n\n

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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) __<\/em><\/strong> 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<\/p>\n\n\n\n

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At some point in their life cycle, all cells have a , whereas not all cells have a(n) <\/strong><\/em><\/strong>.
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:
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BS 161 EXAM 2 NEWEST EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Which of the following is TRUE about the presence or absence
of plasma membranes?
Only animal cells have a plasma membrane. Plant cells and
bacterial cells have a cell wall.
Plant cells and animal cells have a plasma membrane, but
bacterial cells do not.
Plant cells and bacterial cells have a plasma membrane, but
animal cells do not.
All cells have a plasma membrane. – ANSWER- All cells have a
plasma membrane.<\/p>\n\n\n\n

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Some diseases, such as Tay-Sachs, are caused by the defective
breakdown of cellular components. Which of the following
organelles is defective?
endoplasmic reticulum
plasma membrane
lysosome
ribosome
Golgi apparatus – ANSWER- lysosome
Insulin is a protein hormone that helps to control the level of
glucose in the blood. It is secreted from specialized cells in the
pancreas. Based on this information, which path does insulin
take out of the cell?
ER \u2192 Golgi apparatus \u2192 vesicle \u2192 exterior of cell
vesicle \u2192 ER \u2192 Golgi apparatus \u2192 exterior of cell<\/p>\n\n\n\n

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ER \u2192 nucleus \u2192 cytosol \u2192 exterior of cell
nucleus \u2192 ER \u2192 Golgi apparatus \u2192 vesicle \u2192 exterior of cell
ER membrane \u2192 vesicle membrane \u2192 plasma membrane \u2192
exterior of cell – ANSWER- ER \u2192 Golgi apparatus \u2192 vesicle
\u2192 exterior of cell
Concentrations goes from
LOW TO HIGH
HIGH TO LOW – ANSWER- HIGH TO LOW
What is the MOST common energy “currency” for a cell? –
ANSWER- APT
The energy of activation of a reaction is:
the energy input needed to reach the transition state.
the net change in free energy.<\/p>\n\n\n\n

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the difference in energy between substrate and product.
the difference in energy between the transition state and the
product.
equivalent to the \u0394G of ATP hydrolysis – ANSWER- The
energy input needed to reach the transition state.
Which of the following statements violates the first law of
thermodynamics?
cells make energy when they produce ATP.
The conversion of energy from one form to another is 100%
efficient.
The universe contains a constant amount of energy.
Endergonic reactions store energy. – ANSWER- cells make
energy when they produce ATP.
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BS 161 EXAM 3 NEWEST EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Which major checkpoint delays the cell cycle when DNA
replication is incomplete?
1) G1 checkpoint
2) M checkpoint
3) G2 checkpoint G1, G2, and M checkpoints
4) G2 checkpoint – ANSWER- G2 checkpoint
CDKs are important in the regulation of the cell cycle. They
carry out their function by:
1) degrading cyclin proteins
2) adding phosphate groups to proteins
3) preventing the progression of one stage of the cell cycle to
the next
4)removing phosphate – ANSWER- Adding phosphate groups to
proteins<\/p>\n\n\n\n

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Which of the following is TRUE if a cell has a mutation in the
p53 gene such that the p53 protein is no longer able to be
phosphorylated?
1) The kinase activity in the nucleus would decrease
2) the cell would arrest
3) the cell would proceed through the cell cycle even in the
presence of DNA damage
4) the amount of cytoplasmic p53 would increase – ANSWERThe cell would proceed through the cell cycle even in the
presence of DNA damage
Kinase – ANSWER- an enzyme that catalyzes the transfer of a
phosphate group from ATP to a specified molecule.
CDK – ANSWER- cyclin dependent kinase
S phase – ANSWER- The synthesis phase of the cell cycle; the
portion of interphase during which DNA is replicated.
M phase checkpoint – ANSWER- chromosomes have attached to
spindle apparatus, chromosomes have properly segregated and
MPF is absent<\/p>\n\n\n\n

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Cytokinesis – ANSWER- division of the cytoplasm to form two
separate daughter cells
G2 checkpoint – ANSWER- The cell checks to make sure the DNA
is copied correctly
G1 checkpoint – ANSWER- checks for cell size, nutrients, growth
factors and DNA damage
cell cycle – ANSWER- series of events that cells go through as
they grow and divide
G protein – ANSWER- A GTP-binding protein that relays signals
from a plasma membrane signal receptor, known as a G
protein-coupled receptor, to other signal transduction proteins
inside the cell.
Receptors – ANSWER- Special structures that allow living
organisms to sense the conditions of their internal or external
environment.
How do new cyclin proteins appear in the cytoplasm? –
ANSWER- They are made through protein synthesis.
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BS 161 FINAL EXAM NEWEST EXAM COMPLETE 280
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
Which of the following regarding glucose export from the liver cells into
the bloodstream is true?
A) It requires a membrane protein
B) It occurs by osmosis
C) It requires energy
D) It occurs by active transportE) It is endergonic – ANSWER- A
The hormone epinephrine (also called adrenaline) is secreted from cells
of the adrenal gland in response to a threatening or exciting
condition. The hormone binds to G protein-coupled receptors on the
plasma membrane of liver cells, stimulating the breakdown of
glycogen, a polymer of glucose. The glucose diffuses out of the liver
cells, is circulated in the bloodstream, and is subsequently taken up
into muscle cells, where it is used in respiration. The ATP produced by
respiration is used for muscle contraction, allowing the organism
to run for safety in response to the threat. Use all of this information to
answer the following four questions.
Following glucose uptake from the bloodstream, the muscele cells
generate the ATP needed for muscle
contraction through the process of respiration, which _<\/em><\/strong>
glucose to __<\/em><\/strong><\/em><\/strong>.<\/p>\n\n\n\n

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A) oxidizes \u2026 O2
B) oxidizes \u2026 NADH
C) reduces \u2026 CO2
D) oxidizes \u2026 CO2 – ANSWER- D
Based on the polarity of water molecules, the solute above is most likely
A)hydrophobic.
B)nonpolar.
C)uncharged.
D)a cation.
E)an anion – ANSWER- D
what is a hydroxyl group? – ANSWER- -OH
Which of the following hydrocarbons has a double bond in its carbon
skeleton?
A)C2H4 B)C3H8 C)CH4 D)C2H6 E)C2H2 – ANSWER- A
Answers may be used once, more than once, or not at all.
A. applies to nucleic acids
B. applies to proteins
C. applies to polysaccharides
D. applies to lipids<\/p>\n\n\n\n

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E. applies to all macromolecules
4)synthesis involves dehydration reactions – ANSWER- E
Answers may be used once, more than once, or not at all.
A. applies to nucleic acids
B. applies to proteins
C. applies to polysaccharides
D. applies to lipids
E. applies to all macromolecules
5)monomers are linked in peptide bonds – ANSWER- B
Which of the following occurs by hydrolysis?
A)the breakdown of polypeptides to monosaccharides
B)the synthesis of polysaccharides from monosaccharides
C)the breakdown of nucleic acids to nucleotides
D)the formation of peptide bonds
E)the addition of a fatty acid to glycerol – ANSWER- C
Which of the following involves the formation of hydrogen bonds?
A)disulfide bridge formation in proteins
B)\u03b1-helix formation in proteins
C)interaction between carboxyl and amino groups in side chains of
proteins<\/p>\n\n\n\n

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D)interaction between fatty acid tails in phospholipid bilayers
E)the attachment of an amino acid to a growing polypeptide chain –
ANSWER- B
Two DNA molecules have the following base pair compositions:
A. ATGGTAA B. GGAACCC
TACCATT CCTTGGG
Which one would have to be heated to a higher temperature to
completely separate the two strands?
A) A
B) B
C) Neither; they would be completely separated at the same temperature<\/p>\n\n\n\n