1|Page
BIO 141 EXAM 2 LATEST 2026-2027 ACTUAL EXAM WITH COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS (100% VERIFIED
ANSWERS) |ALREADY GRADED A+| ||PROFESSOR VERIFIED||
||BRANDNEW!!!||
Which of the following statements about the nuclear envelope is
false?
a. The nuclear envelope is composed of two lipid bilayers.
b. Molecules pass into and out of the nucleus through nuclear
pores.
c. Nuclear pores are made up of a group of proteins that are
collectively called the nuclear pore complex.
d. The nuclear envelope is continuous with the Golgi apparatus. -
ANSWER-The nuclear envelope is continuous with the Golgi
apparatus.
This is false; the nuclear envelope is actually continuous
with the endoplasmic reticulum.
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True or false? Large proteins containing a nuclear localization
signal (NLS) bind to the nuclear pore and enter the nucleus
without any expenditure of energy.
True or False - ANSWER-False
A small protein (molecular weight = 25,000 daltons) is injected
into a cell and observed in the nucleus a short time later. What
type of transport has taken place?
a. Active transport
b. Osmosis
c. Passive transport - ANSWER-passive transport
In experiments to test whether a protein can enter the nucleus,
why would proteins be labeled with fluorescent molecules?
a. To make the proteins easy to see
b. To make the proteins bigger
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c. To give the protein molecules energy
d. To target the proteins to the nucleus - ANSWER-to make the
proteins easy to see
Nucleoplasmin is a nuclear protein. This protein was divided into
two segments and linked to the same large cytoplasmic protein,
generating two fusion proteins. After injecting these fusion
proteins into a cell, one of the proteins was found in the nucleus
and the other in the cytoplasm. Which of the following conclusions
can be drawn from these results?
a. Nucleoplasmin does not have a nuclear localization signal.
b. Only one of the two fusion proteins possesses a nuclear
localization signal.
c. The cytoplasmic protein contains a nuclear localization signal.
d. One of the fusion proteins entered the nucleus by passive
transport. - ANSWER-only one of the two fusion proteins
possesses a nuclear localization signal
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Pancreatic cells, which secrete a large amount of digestive
enzymes, are labeled with radioactive leucine and then chased for
several hours with nonradioactive leucine. Photographic
emulsions are prepared at different times during the chase.
Where would the black spots appear on an emulsion prepared 3
hours after the pulse?
a. Secretory vesicles
b. Rough ER
c. Exterior of the cell
d. Golgi apparatus - ANSWER-exterior of the cell
What path does a protein in the secretory pathway take, starting
from its site of synthesis?
a. Golgi apparatus, rough ER, secretory vesicles, plasma
membrane
b. Plasma membrane, secretory vesicles, Golgi apparatus, rough
ER
BIO 141 EXAM 2 LATEST 2026-2027 ACTUAL EXAM WITH COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS (100% VERIFIED
ANSWERS) |ALREADY GRADED A+| ||PROFESSOR VERIFIED||
||BRANDNEW!!!||
Which of the following statements about the nuclear envelope is
false?
a. The nuclear envelope is composed of two lipid bilayers.
b. Molecules pass into and out of the nucleus through nuclear
pores.
c. Nuclear pores are made up of a group of proteins that are
collectively called the nuclear pore complex.
d. The nuclear envelope is continuous with the Golgi apparatus. -
ANSWER-The nuclear envelope is continuous with the Golgi
apparatus.
This is false; the nuclear envelope is actually continuous
with the endoplasmic reticulum.
,2|Page
True or false? Large proteins containing a nuclear localization
signal (NLS) bind to the nuclear pore and enter the nucleus
without any expenditure of energy.
True or False - ANSWER-False
A small protein (molecular weight = 25,000 daltons) is injected
into a cell and observed in the nucleus a short time later. What
type of transport has taken place?
a. Active transport
b. Osmosis
c. Passive transport - ANSWER-passive transport
In experiments to test whether a protein can enter the nucleus,
why would proteins be labeled with fluorescent molecules?
a. To make the proteins easy to see
b. To make the proteins bigger
,3|Page
c. To give the protein molecules energy
d. To target the proteins to the nucleus - ANSWER-to make the
proteins easy to see
Nucleoplasmin is a nuclear protein. This protein was divided into
two segments and linked to the same large cytoplasmic protein,
generating two fusion proteins. After injecting these fusion
proteins into a cell, one of the proteins was found in the nucleus
and the other in the cytoplasm. Which of the following conclusions
can be drawn from these results?
a. Nucleoplasmin does not have a nuclear localization signal.
b. Only one of the two fusion proteins possesses a nuclear
localization signal.
c. The cytoplasmic protein contains a nuclear localization signal.
d. One of the fusion proteins entered the nucleus by passive
transport. - ANSWER-only one of the two fusion proteins
possesses a nuclear localization signal
, 4|Page
Pancreatic cells, which secrete a large amount of digestive
enzymes, are labeled with radioactive leucine and then chased for
several hours with nonradioactive leucine. Photographic
emulsions are prepared at different times during the chase.
Where would the black spots appear on an emulsion prepared 3
hours after the pulse?
a. Secretory vesicles
b. Rough ER
c. Exterior of the cell
d. Golgi apparatus - ANSWER-exterior of the cell
What path does a protein in the secretory pathway take, starting
from its site of synthesis?
a. Golgi apparatus, rough ER, secretory vesicles, plasma
membrane
b. Plasma membrane, secretory vesicles, Golgi apparatus, rough
ER
