ASU BIO 181 QUIZ 2 (MODULE 3
& 4) WITH VERIFIED
QUESTIONS AND ANSWERS
GRADED A+ 2026 UPDATE!!
Active transport uses ATP to move components in parallel with their concentration
gradient, that is: from a high concentration to a low concentration. - answer-FALSE
What are the two functions of a membrane? - answer-- Regulating which molecules go
in and out of the cell
- Separating incompatible processes occurring within organelles
If something is soluble in water a of hydration forms around it and it is termed - answer-
Hydrophilic
We are made up of ______ percent water. - answer-50-70%
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. - answer-E. None of the above
What is the difference between a single-pass transmembrane protein and a 7-pass
transmembrane protein? - 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.
, A single pass trans-membrane protein that is an alpha helix can make a channel. -
answer-FALSE
Cholesterol is _____ to have in biological membranes. - answer-Good
Explain the evolutionary origin of the endoplasmic reticulum, Golgi apparatus and
vesicles. - 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. - answer-TRUE
Facilitated diffusion uses a channel protein to let components move down their
concentration gradient. - answer-TRUE
Explain how the vesicles are carried from the Golgi apparatus to the plasma membrane.
- 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 plasma membrane) so then it
later goes to the actin filament system (which are connected to plasma membrane)
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.
& 4) WITH VERIFIED
QUESTIONS AND ANSWERS
GRADED A+ 2026 UPDATE!!
Active transport uses ATP to move components in parallel with their concentration
gradient, that is: from a high concentration to a low concentration. - answer-FALSE
What are the two functions of a membrane? - answer-- Regulating which molecules go
in and out of the cell
- Separating incompatible processes occurring within organelles
If something is soluble in water a of hydration forms around it and it is termed - answer-
Hydrophilic
We are made up of ______ percent water. - answer-50-70%
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. - answer-E. None of the above
What is the difference between a single-pass transmembrane protein and a 7-pass
transmembrane protein? - 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.
, A single pass trans-membrane protein that is an alpha helix can make a channel. -
answer-FALSE
Cholesterol is _____ to have in biological membranes. - answer-Good
Explain the evolutionary origin of the endoplasmic reticulum, Golgi apparatus and
vesicles. - 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. - answer-TRUE
Facilitated diffusion uses a channel protein to let components move down their
concentration gradient. - answer-TRUE
Explain how the vesicles are carried from the Golgi apparatus to the plasma membrane.
- 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 plasma membrane) so then it
later goes to the actin filament system (which are connected to plasma membrane)
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.
