BIOL-L 112 Final Exam with accurate 5 5 5 5 5 5
detailed solutions 5
Which of the following is an antigen presenting cell?
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a. T cell
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b. Plasma cell
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c. macrophage
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d. dendritic cell
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e. dendritic cell and macrophage - Correct answer ✔e. dendritic and
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macrophage
Antigen presenting cell - Correct answer ✔a cell that displays antigen
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complexed with a major histocompatibility complexes
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Which of these is the site for protein and lipid synthesis?
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a. nucleus
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b. cytoskeleton
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c. mitochondria
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d. endoplasmic reticulum
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e. all of these - Correct answer ✔d. endoplasmic reticulum
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Organelle composed of a system of tubes, and sacs that transport molecules
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inside the cytoplasm are:
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,a. Golgi body
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b. ribosome
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c. mitochondrion
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d. lysosome
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e. endoplasmic reticulum - Correct answer ✔e. endoplasmic reticulum
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They have been dubbed as "conveyor belts"; they move vesicles, organelles,
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and chromosomes
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a. cilia
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b. flagella
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c. microtubules
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d. microfilaments
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e. Golgi apparatus - Correct answer ✔c. microtubules
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Peoxisomes would most likely be involved in the metabolism of:
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a. glucose
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b. alcohol
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c. white blood cells
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d. pesticides
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e. nucleoli - Correct answer ✔b. alcohol
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Which statement is NOT true?
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a. Membranes are often perforated by proteins that extend through both sides
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of the membrane
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, b. Some membranes have proteins with channels or proes that allow for the
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passage of hydrophilic substances
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c. Hydrophilic substances have an easier time passing through membranes
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than hydrophobic substances do
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d. The current concept of a membrane can be best summarized by the fluid
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mosaic model 5
e. The lipid bilayer serves as a hydrophobic barrier between two fluid regions -
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5Correct answer ✔c. Hydrophilic substances have an easier time passing
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through membranes than hydrophobic
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In order to ensure the precision of the excision of introns, the junction
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between introns and exons are bound by:
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a. snRNPs
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b. ribozymes
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c. single stranded RNA binding proteins
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d. RNA polymerase
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e. all of these - Correct answer ✔a. snRNPs
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snRNPs - Correct answer ✔combine with unmodified cells
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Introns - Correct answer ✔do not directly code for proteins
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Ribozymes - Correct answer ✔pre-mRNA to form a spliceosome
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Exons - Correct answer ✔part of DNA that is converted to mRNA
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detailed solutions 5
Which of the following is an antigen presenting cell?
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a. T cell
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b. Plasma cell
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c. macrophage
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d. dendritic cell
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e. dendritic cell and macrophage - Correct answer ✔e. dendritic and
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macrophage
Antigen presenting cell - Correct answer ✔a cell that displays antigen
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complexed with a major histocompatibility complexes
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Which of these is the site for protein and lipid synthesis?
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a. nucleus
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b. cytoskeleton
5
c. mitochondria
5
d. endoplasmic reticulum
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e. all of these - Correct answer ✔d. endoplasmic reticulum
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Organelle composed of a system of tubes, and sacs that transport molecules
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inside the cytoplasm are:
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,a. Golgi body
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b. ribosome
5
c. mitochondrion
5
d. lysosome
5
e. endoplasmic reticulum - Correct answer ✔e. endoplasmic reticulum
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They have been dubbed as "conveyor belts"; they move vesicles, organelles,
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and chromosomes
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a. cilia
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b. flagella
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c. microtubules
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d. microfilaments
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e. Golgi apparatus - Correct answer ✔c. microtubules
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Peoxisomes would most likely be involved in the metabolism of:
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a. glucose
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b. alcohol
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c. white blood cells
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d. pesticides
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e. nucleoli - Correct answer ✔b. alcohol
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Which statement is NOT true?
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a. Membranes are often perforated by proteins that extend through both sides
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of the membrane
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, b. Some membranes have proteins with channels or proes that allow for the
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passage of hydrophilic substances
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c. Hydrophilic substances have an easier time passing through membranes
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than hydrophobic substances do
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d. The current concept of a membrane can be best summarized by the fluid
5 5 5 5 5 5 5 5 5 5 5 5 5 5
mosaic model 5
e. The lipid bilayer serves as a hydrophobic barrier between two fluid regions -
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5Correct answer ✔c. Hydrophilic substances have an easier time passing
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through membranes than hydrophobic
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In order to ensure the precision of the excision of introns, the junction
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between introns and exons are bound by:
5 5 5 5 5 5
a. snRNPs
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b. ribozymes
5
c. single stranded RNA binding proteins
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d. RNA polymerase
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e. all of these - Correct answer ✔a. snRNPs
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snRNPs - Correct answer ✔combine with unmodified cells
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Introns - Correct answer ✔do not directly code for proteins
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Ribozymes - Correct answer ✔pre-mRNA to form a spliceosome
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Exons - Correct answer ✔part of DNA that is converted to mRNA
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