Question: Which of the following options is NOT found in prokaryotic organisms?
Answer Options:
A) Ribosomes
B) Nucleic acids (DNA and RNA)
C) Nucleus
D) Plasma membrane
Answer: C) Nucleus
Question: The theory of endosymbiosis provides a possible explanation for the formation of which two cellular organelles?
Answer Options:
A) Golgi apparatus and ribosomes
B) Chloroplast and mitochondria
C) Mitochondria and endoplasmic reticulum
D) Chloroplast and endoplasmic reticulum
E) Golgi apparatus and endoplasmic reticulum
Answer: B) Chloroplast and mitochondria
Question: The cell membrane is referred to as a fluid mosaic because…
Answer Options:
A) Many different types of molecules like proteins are also found embedded in or on the periphery of the membrane and molecules in the membrane can move freely throughout the bilayer.
B) Many different types of molecules like proteins are also found embedded in or on the periphery of the membrane and can move freely through an aqueous solution within the middle of the bilayer.
C) Many different types of motility organelles are found embedded in the membrane allowing the cell to move fluidly around its environment.
D) The phospholipid bilayer allows other molecules to move fluidly into and out of the cell.
Answer: A) Many different types of molecules like proteins are also found embedded in or on the periphery of the membrane and molecules in the membrane can move freely throughout the bilayer.
Question: The principal components of the cell membrane are…
Answer Options:
A) Proteins
B) Nucleic acids
C) Lipids
D) Carbohydrates
Answer: C) Lipids
Question: Phospholipids assemble spontaneously into bilayers organized by the different attractive forces of their “tail” and “head” regions. The head regions containing the phosphate group are considered…
Answer Options:
A) Hydrophobic
B) Hydrophilic
C) Amphipathic
Answer: B) Hydrophilic
Question: Which type of transport of molecules across the plasma membrane requires the expenditure or use of energy for it to occur?
Answer Options:
A) Active transport
B) Simple diffusion
C) Facilitated diffusion
D) Osmosis
Answer: A) Active transport
Question: Which option below does NOT describe facilitated diffusion?
Answer Options:
A) Requires energy to move molecules across the membrane
B) Moves larger, hydrophilic molecules across the membrane
C) Utilizes proteins to bring molecules across the membrane
D) Moves molecules down their concentration gradient from high to low concentration
Answer: A) Requires energy to move molecules across the membrane
Question: Which of the following molecules CANNOT simply diffuse through the plasma membrane and must be transported?
Answer Options:
A) Glucose
B) Oxygen gas
C) Water
D) Very small, non-polar molecules
Answer: A) Glucose
Question: Sugar and CO₂ are dissolved into water to make carbonated soft drinks. What is(are) the solute(s) within such a soft drink?
Answer Options:
A) Both the sugar and the CO₂
B) The CO₂ only
C) The water only
D) The sugar only
Answer: A) Both the sugar and the CO₂
Question: In the below red blood cell (animal cell), which option represents the solution on the outside (external) of the cell compared to what is on the inside of the cell?
External Solution: 12% NaCl
Internal Solution: 2% NaCl
Answer Options:
A) Hypertonic
B) Isotonic
C) Hypotonic
Answer: A) Hypertonic
Question: For the red blood cell (animal cell) shown below, water will most likely ___ the cell, which ___ considering the external solution it has been placed in.
External Solution: 12% NaCl
Internal Solution: 12% NaCl
First Options:
A) Move equally in and out of the cell
B) Net move out of the cell
C) Net move into the cell
Second Options:
D) Will shrink and shrivel up
E) Will not be impacted
F) Will expand and likely burst
Answer Options:
Question:
For the red blood cell (animal cell) shown below, water will most likely ___ the cell, which ___ considering the external solution it has been placed in.
External Solution: 12% NaCl
Internal Solution: 12% NaCl
First Options:
A) Move equally in and out of the cell
B) Net move out of the cell
C) Net move into the cell
Second Options:
D) Will shrink and shrivel up
E) Will not be impacted
F) Will expand and likely burst
Answer: First Blank: A) Move equally in and out of the cell
Second Blank: E) Will not be impacted
Question: Membrane-bound vesicles containing a substance synthesized by a cell fuse to the outer cell membrane and release their contents to the outside environment. What is this process called?
Answer Options:
A) Exocytosis
B) Osmosis
C) Facilitated diffusion
D) Endocytosis
Answer: A) Exocytosis