ASU BIO 181 QUIZ 2 (Module 3 & 4)
Questions and Correct Answers (Verified
Answers) | New 2026/27 Update | Graded A+
Active transport uses ATP to move components in parallel with their concentration
gradient, that is: from a high concentration to a low concentration. - ANSWERS
FALSE
What are the two functions of a membrane? - ANSWERS - 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 -
ANSWERS Hydrophilic
We are made up of ______ percent water. - ANSWERS 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. - ANSWERS E. None of the above
, What is the difference between a single-pass transmembrane protein and a 7-pass
transmembrane protein? - ANSWERS 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. -
ANSWERS FALSE
Cholesterol is _____ to have in biological membranes. - ANSWERS Good
Explain the evolutionary origin of the endoplasmic reticulum, Golgi apparatus and
vesicles. - ANSWERS 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. - ANSWERS TRUE
Facilitated diffusion uses a channel protein to let components move down their
concentration gradient. - ANSWERS TRUE
Explain how the vesicles are carried from the Golgi apparatus to the plasma
membrane. - ANSWERS The vesicles are carried from the Golgi to the plasma
membrane by the microtuble system (which doesn't reach all the way to the
Questions and Correct Answers (Verified
Answers) | New 2026/27 Update | Graded A+
Active transport uses ATP to move components in parallel with their concentration
gradient, that is: from a high concentration to a low concentration. - ANSWERS
FALSE
What are the two functions of a membrane? - ANSWERS - 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 -
ANSWERS Hydrophilic
We are made up of ______ percent water. - ANSWERS 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. - ANSWERS E. None of the above
, What is the difference between a single-pass transmembrane protein and a 7-pass
transmembrane protein? - ANSWERS 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. -
ANSWERS FALSE
Cholesterol is _____ to have in biological membranes. - ANSWERS Good
Explain the evolutionary origin of the endoplasmic reticulum, Golgi apparatus and
vesicles. - ANSWERS 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. - ANSWERS TRUE
Facilitated diffusion uses a channel protein to let components move down their
concentration gradient. - ANSWERS TRUE
Explain how the vesicles are carried from the Golgi apparatus to the plasma
membrane. - ANSWERS The vesicles are carried from the Golgi to the plasma
membrane by the microtuble system (which doesn't reach all the way to the
