BIO NEWEST 2025 EXAM 2 WITH MULTIPLE CHOICE
OF QUESTIONS AND DETAILED CORRECT ANSWERS
ALREADY GRADED A+ AND 100% GUARANREE PASS
(BRAND NEW!!!!!!)
White blood cells (WBCs) are more resistant to lysis than red blood cells
(RBCs). When looking at a sample of blood for WBCs, what could you do to
reduce interference from RBCs?
A) Mix the blood in a hypertonic solution, which will cause the RBCs to
lyse.
B) Mix the blood in a hypotonic solution, which will cause the RBCs to lyse.
C) Mix the blood in an isotonic solution and allow the WBCs to float to the
top.
D) Mix the blood in a salty solution to cause the RBCs to lyse. - CORRECT
ANSWER-B) Mix the blood in a hypotonic solution, which will cause the RBCs
to lyse.
A plant cell in a hypotonic solution
A) shrivels because of an outflow of water.
B) becomes turgid because of an inflow of water.
C) bursts because of an inflow of water.
D) wilts because of an outflow of water. - CORRECT ANSWER-B) becomes
turgid because of an inflow of water.
You are adrift in the Atlantic Ocean and, being thirsty, drink the
surrounding seawater. As a result,
,A) you quench your thirst.
B) your cells become turgid.
C) your cells lyse from excessive water intake.
D) you dehydrate yourself. - CORRECT ANSWER-D) you dehydrate yourself.
Facilitated diffusion across a biological membrane requires ________ and
moves a substance ________ its concentration gradient.
A) energy and transport proteins; against
B) energy and transport proteins; down
C) transport proteins; down
D) transport proteins; against - CORRECT ANSWER-C) transport proteins;
down
The molecules responsible for membrane transport are
A) carbohydrates.
B) steroids.
C) phospholipids.
D) proteins. - CORRECT ANSWER-D) proteins.
Which of the following statements is true for all types of passive transport?
A) Proteins are needed to transport molecules across the membrane.
B) Ions never cross the plasma membrane by passive transport.
C) Only small polar molecules are able to cross the plasma membrane.
D) The concentration gradient is the driving force. - CORRECT ANSWER-D)
The concentration gradient is the driving force.
, Aquaporins
A) allow water to cross the plasma membrane against its concentration
gradient.
B) allow water to cross the plasma membrane via facilitated diffusion.
C) are found in all cells.
D) allow for the active transport of water. - CORRECT ANSWER-B) allow water
to cross the plasma membrane via facilitated diffusion.
Which of the following processes can move a solute against its
concentration gradient?
A) osmosis
B) facilitated diffusion
C) passive transport
D) active transport - CORRECT ANSWER-D) active transport
Which of the following is a typical feature of an ATP-driven active transport
mechanism?
A) The solute moves against the concentration gradient.
B) The transport protein catalyzes the conversion of ADP to ATP.
C) The transport protein must cross to the correct side of the membrane
before the solute can
bind to it.
D) The transport protein is irreversibly phosphorylated as transport takes
place. - CORRECT ANSWER-A) The solute moves against the concentration
gradient.
OF QUESTIONS AND DETAILED CORRECT ANSWERS
ALREADY GRADED A+ AND 100% GUARANREE PASS
(BRAND NEW!!!!!!)
White blood cells (WBCs) are more resistant to lysis than red blood cells
(RBCs). When looking at a sample of blood for WBCs, what could you do to
reduce interference from RBCs?
A) Mix the blood in a hypertonic solution, which will cause the RBCs to
lyse.
B) Mix the blood in a hypotonic solution, which will cause the RBCs to lyse.
C) Mix the blood in an isotonic solution and allow the WBCs to float to the
top.
D) Mix the blood in a salty solution to cause the RBCs to lyse. - CORRECT
ANSWER-B) Mix the blood in a hypotonic solution, which will cause the RBCs
to lyse.
A plant cell in a hypotonic solution
A) shrivels because of an outflow of water.
B) becomes turgid because of an inflow of water.
C) bursts because of an inflow of water.
D) wilts because of an outflow of water. - CORRECT ANSWER-B) becomes
turgid because of an inflow of water.
You are adrift in the Atlantic Ocean and, being thirsty, drink the
surrounding seawater. As a result,
,A) you quench your thirst.
B) your cells become turgid.
C) your cells lyse from excessive water intake.
D) you dehydrate yourself. - CORRECT ANSWER-D) you dehydrate yourself.
Facilitated diffusion across a biological membrane requires ________ and
moves a substance ________ its concentration gradient.
A) energy and transport proteins; against
B) energy and transport proteins; down
C) transport proteins; down
D) transport proteins; against - CORRECT ANSWER-C) transport proteins;
down
The molecules responsible for membrane transport are
A) carbohydrates.
B) steroids.
C) phospholipids.
D) proteins. - CORRECT ANSWER-D) proteins.
Which of the following statements is true for all types of passive transport?
A) Proteins are needed to transport molecules across the membrane.
B) Ions never cross the plasma membrane by passive transport.
C) Only small polar molecules are able to cross the plasma membrane.
D) The concentration gradient is the driving force. - CORRECT ANSWER-D)
The concentration gradient is the driving force.
, Aquaporins
A) allow water to cross the plasma membrane against its concentration
gradient.
B) allow water to cross the plasma membrane via facilitated diffusion.
C) are found in all cells.
D) allow for the active transport of water. - CORRECT ANSWER-B) allow water
to cross the plasma membrane via facilitated diffusion.
Which of the following processes can move a solute against its
concentration gradient?
A) osmosis
B) facilitated diffusion
C) passive transport
D) active transport - CORRECT ANSWER-D) active transport
Which of the following is a typical feature of an ATP-driven active transport
mechanism?
A) The solute moves against the concentration gradient.
B) The transport protein catalyzes the conversion of ADP to ATP.
C) The transport protein must cross to the correct side of the membrane
before the solute can
bind to it.
D) The transport protein is irreversibly phosphorylated as transport takes
place. - CORRECT ANSWER-A) The solute moves against the concentration
gradient.
