1|Page
ASU MIC 205 PENTON EXAM 1 LATEST 2025/2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What are aquaporins? - ANSWER-Aquaporins are water channels
through which water molecules move through the plasma
membrane during osmosis.
What is facilitated diffusion? - ANSWER-Facilitated diffusion is a
passive transport process that uses specific transport proteins to
help move larger or polar molecules across the membrane.
How does glucose enter cells? - ANSWER-Glucose enters cells
via specific transporter proteins (GLUT transporters) because
glucose is too large and polar to pass through the membrane
directly.
What is active transport? - ANSWER-A method that requires
energy (usually from ATP) to move molecules against their
concentration gradient, from an area of lower concentration to an
area of higher concentration.
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What is the role of the sodium-potassium pump in active
transport? - ANSWER-It actively transports sodium ions (Na⁺) out
of the cell and potassium ions (K⁺) into the cell against their
concentration gradients, using ATP for energy.
what are the 2 types of active transport - ANSWER-endocytosis
and exocytosis
Endocytosis and Exocytosis: - ANSWER-In endocytosis, the cell
membrane engulfs material to bring it inside the cell, while
exocytosis involves vesicles fusing with the membrane to release
materials outside the cell.
Endocytosis example - ANSWER-Phagocytosis, where immune
cells like macrophages engulf bacteria or debris by wrapping the
cell membrane around them and forming a vesicle.
Exocytosis - ANSWER-Neurotransmitters are released from nerve
cells into the synaptic cleft when vesicles containing these
signaling molecules fuse with the plasma membrane.
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why do bacteria have to move molecules across the membrane -
ANSWER-Nutrient uptake, waste removal, signal reception,
Homeostasis, Energy production
What are the different transport proteins? - ANSWER-Channel
Proteins, Carrier Proteins:, Pump Proteins, Symporters,
Antiporters
How do channel proteins operate? - ANSWER-They form water-
filled pores that allow specific ions or small molecules to pass
through.
What determines whether channel proteins are open or closed? -
ANSWER-They can be open all the time or gated, it opens or
closes when it gets a signal like a physical pressure or electrical
voltage
What is the function of open channel proteins? - ANSWER-When
open, they allow rapid movement of substances down their
concentration gradient through facilitated diffusion.
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How do carrier proteins operate? - ANSWER-Carrier proteins bind
to specific molecules then they change shape to fit through the
channel and gets dropped off inside
What happens to carrier proteins after binding a molecule? -
ANSWER-The protein changes shape (conformational change),
allowing the molecule to be released on the other side of the
membrane.
What are the two types of processes involving carrier proteins? -
ANSWER-The process can be passive (facilitated diffusion) or
active (requiring energy).
How do pump proteins operate? - ANSWER-Pump proteins
actively transport ions or molecules against their concentration
gradient.
What provides energy for pump proteins to function? - ANSWER-
Pump proteins use energy from ATP hydrolysis to transport ions
or molecules.
ASU MIC 205 PENTON EXAM 1 LATEST 2025/2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What are aquaporins? - ANSWER-Aquaporins are water channels
through which water molecules move through the plasma
membrane during osmosis.
What is facilitated diffusion? - ANSWER-Facilitated diffusion is a
passive transport process that uses specific transport proteins to
help move larger or polar molecules across the membrane.
How does glucose enter cells? - ANSWER-Glucose enters cells
via specific transporter proteins (GLUT transporters) because
glucose is too large and polar to pass through the membrane
directly.
What is active transport? - ANSWER-A method that requires
energy (usually from ATP) to move molecules against their
concentration gradient, from an area of lower concentration to an
area of higher concentration.
,2|Page
What is the role of the sodium-potassium pump in active
transport? - ANSWER-It actively transports sodium ions (Na⁺) out
of the cell and potassium ions (K⁺) into the cell against their
concentration gradients, using ATP for energy.
what are the 2 types of active transport - ANSWER-endocytosis
and exocytosis
Endocytosis and Exocytosis: - ANSWER-In endocytosis, the cell
membrane engulfs material to bring it inside the cell, while
exocytosis involves vesicles fusing with the membrane to release
materials outside the cell.
Endocytosis example - ANSWER-Phagocytosis, where immune
cells like macrophages engulf bacteria or debris by wrapping the
cell membrane around them and forming a vesicle.
Exocytosis - ANSWER-Neurotransmitters are released from nerve
cells into the synaptic cleft when vesicles containing these
signaling molecules fuse with the plasma membrane.
,3|Page
why do bacteria have to move molecules across the membrane -
ANSWER-Nutrient uptake, waste removal, signal reception,
Homeostasis, Energy production
What are the different transport proteins? - ANSWER-Channel
Proteins, Carrier Proteins:, Pump Proteins, Symporters,
Antiporters
How do channel proteins operate? - ANSWER-They form water-
filled pores that allow specific ions or small molecules to pass
through.
What determines whether channel proteins are open or closed? -
ANSWER-They can be open all the time or gated, it opens or
closes when it gets a signal like a physical pressure or electrical
voltage
What is the function of open channel proteins? - ANSWER-When
open, they allow rapid movement of substances down their
concentration gradient through facilitated diffusion.
, 4|Page
How do carrier proteins operate? - ANSWER-Carrier proteins bind
to specific molecules then they change shape to fit through the
channel and gets dropped off inside
What happens to carrier proteins after binding a molecule? -
ANSWER-The protein changes shape (conformational change),
allowing the molecule to be released on the other side of the
membrane.
What are the two types of processes involving carrier proteins? -
ANSWER-The process can be passive (facilitated diffusion) or
active (requiring energy).
How do pump proteins operate? - ANSWER-Pump proteins
actively transport ions or molecules against their concentration
gradient.
What provides energy for pump proteins to function? - ANSWER-
Pump proteins use energy from ATP hydrolysis to transport ions
or molecules.
