1|Page
ASU BIO 181EXAM 1 NEWEST 2026 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALL
ANSWERED {100 Q & A} ALREADY GRADED A+ |
BRAND NEW! | 100% PASS
The plasma membrane gets new lipids from:
A. The lumen of the ER.
B. The lumen of the Golgi apparatus.
C. Making new lipids at the plasma membrane.
D. The nucleus.
E. None of the above. - ✔✔✔ Correct Answer > E. None of the above
In order to examine cells which are smaller than can be detected
by the human senses what needs to be used? (pick the best
answer).
A. Patience
B. Hypotheses
C. Technology
D. A cell trap
E. None of the above - ✔✔✔ Correct Answer > C. Technology
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What is the difference between a single-pass transmembrane
protein and a 7-pass transmembrane protein? - ✔✔✔ Correct Answer
> Because the inside of the phospholipid bilayer of the cell
membrane is hydrophobic, this one hydrophobic peak indicates
the glycophorin only cross the phospholipid bilayer once, and
thus a single pass protein. Multi pass proteins cross the plasma
membrane multiple times.
For a protein to enter the endoplasmic reticulum as part of the
endoplasmic reticulum's lumen or part of the endoplasmic
reticulum's membrane:
A. The messenger RNA goes directly to the ER.
B. A ribosome binds to the mRNA and a short stretch of protein
is synthesized that contains a signal sequence.
C. Ribosomes at the endoplasmic reticulum bind to the protein
D. Is a random event and one day the protein could go to the ER
and on another day the same protein could associate with a free
polyribosome.
E. None of the above. - ✔✔✔ Correct Answer > B. A ribosome binds to
the mRNA and a short stretch of protein is synthesized that
contains a signal sequence.
A single pass trans-membrane protein that is an alpha helix can
make a channel. - ✔✔✔ Correct Answer > FALSE
, 3|Page
Cholesterol is _____ to have in biological membranes. - ✔✔✔ Correct
Answer > Good
Explain the evolutionary origin of the endoplasmic reticulum,
Golgi apparatus and vesicles. - ✔✔✔ Correct Answer > The
endoplasmic reticulum (ER) plays a key role in the modification
of proteins and the synthesis of lipids.
The Endoplasmic reticulum, Golgi, and vesicles all evolved from
the endomembrane system which is when the cells surface
became flexible many millions of years ago due to losing the cell
wall. This allowed for the exchanging of material with the
environment to happen rapidly, which then lead to the cell to
sustain a larger volume and have a more rapid metabolism.
The ER is contiguous with the nuclear envelope. - ✔✔✔ Correct
Answer > TRUE
Facilitated diffusion uses a channel protein to let components
move down their concentration gradient. - ✔✔✔ Correct Answer >
TRUE
Explain how the vesicles are carried from the Golgi apparatus to
the plasma membrane. - ✔✔✔ Correct Answer > The vesicles are
carried from the Golgi to the plasma membrane by the
microtuble system (which doesn't reach all the way to the
ASU BIO 181EXAM 1 NEWEST 2026 ACTUAL
EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALL
ANSWERED {100 Q & A} ALREADY GRADED A+ |
BRAND NEW! | 100% PASS
The plasma membrane gets new lipids from:
A. The lumen of the ER.
B. The lumen of the Golgi apparatus.
C. Making new lipids at the plasma membrane.
D. The nucleus.
E. None of the above. - ✔✔✔ Correct Answer > E. None of the above
In order to examine cells which are smaller than can be detected
by the human senses what needs to be used? (pick the best
answer).
A. Patience
B. Hypotheses
C. Technology
D. A cell trap
E. None of the above - ✔✔✔ Correct Answer > C. Technology
,2|Page
What is the difference between a single-pass transmembrane
protein and a 7-pass transmembrane protein? - ✔✔✔ Correct Answer
> Because the inside of the phospholipid bilayer of the cell
membrane is hydrophobic, this one hydrophobic peak indicates
the glycophorin only cross the phospholipid bilayer once, and
thus a single pass protein. Multi pass proteins cross the plasma
membrane multiple times.
For a protein to enter the endoplasmic reticulum as part of the
endoplasmic reticulum's lumen or part of the endoplasmic
reticulum's membrane:
A. The messenger RNA goes directly to the ER.
B. A ribosome binds to the mRNA and a short stretch of protein
is synthesized that contains a signal sequence.
C. Ribosomes at the endoplasmic reticulum bind to the protein
D. Is a random event and one day the protein could go to the ER
and on another day the same protein could associate with a free
polyribosome.
E. None of the above. - ✔✔✔ Correct Answer > B. A ribosome binds to
the mRNA and a short stretch of protein is synthesized that
contains a signal sequence.
A single pass trans-membrane protein that is an alpha helix can
make a channel. - ✔✔✔ Correct Answer > FALSE
, 3|Page
Cholesterol is _____ to have in biological membranes. - ✔✔✔ Correct
Answer > Good
Explain the evolutionary origin of the endoplasmic reticulum,
Golgi apparatus and vesicles. - ✔✔✔ Correct Answer > The
endoplasmic reticulum (ER) plays a key role in the modification
of proteins and the synthesis of lipids.
The Endoplasmic reticulum, Golgi, and vesicles all evolved from
the endomembrane system which is when the cells surface
became flexible many millions of years ago due to losing the cell
wall. This allowed for the exchanging of material with the
environment to happen rapidly, which then lead to the cell to
sustain a larger volume and have a more rapid metabolism.
The ER is contiguous with the nuclear envelope. - ✔✔✔ Correct
Answer > TRUE
Facilitated diffusion uses a channel protein to let components
move down their concentration gradient. - ✔✔✔ Correct Answer >
TRUE
Explain how the vesicles are carried from the Golgi apparatus to
the plasma membrane. - ✔✔✔ Correct Answer > The vesicles are
carried from the Golgi to the plasma membrane by the
microtuble system (which doesn't reach all the way to the
