Cell Membrane Quiz
Cell Membrane Quiz
Test your knowledge of cell membranes with our engaging quiz! Explore essential concepts about the structure, fun Key Features:
Who proposed that the membrane is a mosaic of protein molecules bobbing in a fluid bilayer of phospholipids?
H. Davson and J. Danielli
I. Langmuir
C. Overton
S. Singer and G. Nicolson
Which of the following types of molecules are the major structural components of the cell membrane?
phospholipids and cellulose
nucleic acids and proteins
Phospholipids and proteins
Proteins and cellulose
For the following questions, match the labeled component of the cell membrane with its description
Peripheral protein
A
B
C
D
Cholesterol
A
E
C
B
Fiber of the extracellular matrix
A
B
C
D
Microfilament of the cytoskeleton
A
B
C
D
Glycolipid
A
B
C
D
The presence of cholesterol in the plasma membranes of some animals
Enables the membrane to stay fluid more easily when cell temperature drops
enables the animal to remove hydrogen atoms from saturated phospholipids.
Enables the animal to add hydrogen atoms to unsaturated phospholipids
Makes the membrane less flexible, allowing it to sustain greater pressure from within the cell.
According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids?
They can move laterally along the plane of the membrane
They frequently flip-flop from one side of the membrane to the other.
They occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane
They have hydrophilic tails in the interior of the membrane.
Which of the following is one of the ways that the membranes of winter wheat are able to remain fluid when it is extremely cold?
By increasing the percentage of cholesterol molecules in the membrane
By increasing the percentage of unsaturated phospholipids in the membrane
By decreasing the number of hydrophobic proteins in the membrane
By co-transport of glucose and hydrogen
Which of the following is true of integral membrane proteins?
They lack tertiary structure
They are loosely bound to the surface of the bilayer.
They are usually transmembrane proteins
They are not mobile within the bilayer.
Of the following fun
facilitated diffusion of molecules down their concentration gradients
Active transport of molecules against their concentration gradients
maintaining the integrity of a fluid mosaic membrane
A cellʹs ability to distinguish one type of neighboring cell from another
Which of these are not embedded in the lipid bilayer at all?
Transmembrane proteins
Integral proteins
Peripheral proteins
Integrins
What kinds of molecules pass through a cell membrane most easily?
large and hydrophobic
Small and hydrophobic
large polar
Ionic
Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?
Amino acid
K+
Glucose
CO2
Which of the following statements is correct about diffusion?
It is very rapid over long distances.
It requires an expenditure of energy by the cell.
It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.
It is an active process in which molecules move from a region of lower concentration to one of higher concentration.
Water passes quickly through cell membranes because
The bilayer is hydrophilic.
It moves through hydrophobic channels
Water movement is tied to ATP hydrolysis.
It moves through aquaporins in the membrane.
Chloride ion channels are membrane structures that include which of the following?
Gap junctions
Aquaporins
hydrophilic proteins
Carbohydrates
Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are
Hypotonic to both fresh water and the salt solution.
Hypertonic to both fresh water and the salt solution.
Hypertonic to fresh water but hypotonic to the salt solution
Hypotonic to fresh water but hypertonic to the salt solution.
When a plant cell, such as one from a peony stem, is submerged in a very hypotonic solution, what is likely to occur?
The cell will burst
The cell membrane will lyse
The cell will become flaccid
the cell will become turgid
Which of the following membrane activities require energy from ATP hydrolysis?
facilitated diffusion.
Movement of water into a cell
Na+ ions moving out of the cell
Movement of glucose molecules
What is the voltage across a membrane called?
Chemical gradient
Membrane potential
Osmotic potential
Electrochemical gradient
The sodium-potassium pump is called an electrogenic pump because it
Pumps equal quantities of Na+ and K+ across the membrane.
Pumps hydrogen ions out of the cell.
Contributes to the membrane potential
Is used to drive the transport of other molecules against a concentration gradient.
Ions diffuse across membranes down their
chemical gradients
Concentration gradients
Electrical gradients
Electrochemical gradients
What mechanisms do plants use to load sucrose produced by photosynthesis into specialized cells in the veins of leaves?
An electrogenic pump
a proton pump
A contransport protein
A and C only
A, B, and C
Which of the following processes includes all others?
Osmosis
diffusion of a solute across a membrane
Facilitated diffusion
Passive transport
transport of an ion down its electrochemical gradient
In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?
On the outside of vesicles
on the inside surface of the cell membrane
on the inside surface of the vesicle
on the outer surface of the nucleus
White blood cells engulf bacteria through what process?
Exocytosis
Phagocytosis
Pinocytosis
receptor-mediated exocytosis
شو قررتو اسم الدٝعة
كورونا
مدرسة التكنو النموذجية
والله ما منسميها
بدناش محاضرة الانترو الاضاٝية
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