CELLULAR AND MOLECULAR BIOLOGY FINAL EXAM
NEWEST 2025-2026 ACTUAL EXAM 180 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED A+
✅ Key Features
Newest 2025–2026 edition
Complete set of 180 high-quality exam questions
Correct, verified answers with detailed rationales
Covers core topics, including:
o Cell structure and organelles
o Molecular biology processes (DNA replication, transcription, translation)
o Cellular metabolism and energy production
o Signal transduction and cellular communication
o Genetic regulation and molecular genetics
Mirrors the difficulty and format of the actual final exam
Builds critical thinking, problem-solving, and exam readiness
🎯 Who This Resource Is For
Students preparing for Cellular and Molecular Biology Final Exams
Learners seeking detailed rationales to fully understand complex concepts
Students aiming to improve exam performance and secure top grades
Anyone needing a refresher on advanced cellular and molecular biology topics
🧬 Cellular and Molecular Biology Final Exam 2025–2026 | 180 Verified Questions +
Detailed Answers with Rationales | Already Graded A+
A confocal microscope is a type of microscope that can obtain 3D images with a very little background.
Which of the following is FALSE about confocal microscopes?
A. it uses a laser as a light source
B. it captures images from a very thing place of specimen at a time
C. it dissolves the cytoplasm leaving the cell membrane for imaging
D. it collects a series of 2D images to reconstruct a 3D image - answer-C
,The highest resolution of a transmission electron microscope - answer-.002 micrometers
The Basic design of a fluorescence microscope is sown on the right. Which of the following is true?
A. it uses electron breams as the light source
B. The filter 1 Allows a particular wavelength of light to stimulate the fluorescence emission
C. the device 2 is called a condenser which can condense the fluorescent lights to make the signal
brighter
D. you need to stain the specimen with hematoxylin and eosin in order to observe the structure with
fluorescence scope - answer-B
Which of the following is false about IgG antibody?
A. it is a complex formed by 4 subunits
B. IgG is a synthetic molecule created by organic chemistry methods
C. IgG can activate white blood cells to remove pathogens
D. The antigen-binding site has strong affinity to specific antigen - answer-B
Which of the following cannot diffuse across the cell membrane?
A. H+ ion
B. H2O
C. Ethanol
D. CO2 gas - answer-A
Which of the following is true about active transport?
A. it transports solute from low to high concentration
B. it can be done by the carrier and ion channel
C. it usually requires a signal molecule to initiate the transport
D. it happens to those molecules that can freely diffuse across the membrane - answer-A
, Which of the following is false about ion channels?
A. they form aqueous pores on the membrane
B. They transport ions across membrane against concentration gradient
C. they are also called gated ion channels because they need signals to trigger the opening D. they are
highly selective for the ions to pass through - answer-B
When the sodium ion channel is in the inactivated conformation,
A. the ion channel won't respond to any stimulus
B. the membrane potential is at a resting state
C. sodium will flux out of the cell
D. the membrane potential is at -40 mv - answer-A
At the synapse, the electrical signal of an action potential is converted to a chemical signal, which then
travels through the synaptic cleft reaching the receptors on the postsynaptic membrane. Which of the
following is FALSE?
A. the chemical signal is often referred to as the neurotransmitter
B. the calcium in the presynaptic nerve terminal triggers the release of the chemical signal
C. the chemical signal is usually stable and stays in the synaptic cleft for a long time
D. the receptor for the chemical signal is usually an ion channel - answer-C
Which of the following is TRUE about the slow response triggered by a signal molecule?
A. the signal is transduced to cytoplasm only
B. the signal activates transcription of target genes
C. the signal alters cytoskeletal systems
D. the signal molecule is taken into the cell - answer-B
Which of the following is TRUE about the G-protein coupled receptors?
A. they become active when they are bound with GTP
B. they are able to bind DNA and activate the transcription of target genes
NEWEST 2025-2026 ACTUAL EXAM 180 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED A+
✅ Key Features
Newest 2025–2026 edition
Complete set of 180 high-quality exam questions
Correct, verified answers with detailed rationales
Covers core topics, including:
o Cell structure and organelles
o Molecular biology processes (DNA replication, transcription, translation)
o Cellular metabolism and energy production
o Signal transduction and cellular communication
o Genetic regulation and molecular genetics
Mirrors the difficulty and format of the actual final exam
Builds critical thinking, problem-solving, and exam readiness
🎯 Who This Resource Is For
Students preparing for Cellular and Molecular Biology Final Exams
Learners seeking detailed rationales to fully understand complex concepts
Students aiming to improve exam performance and secure top grades
Anyone needing a refresher on advanced cellular and molecular biology topics
🧬 Cellular and Molecular Biology Final Exam 2025–2026 | 180 Verified Questions +
Detailed Answers with Rationales | Already Graded A+
A confocal microscope is a type of microscope that can obtain 3D images with a very little background.
Which of the following is FALSE about confocal microscopes?
A. it uses a laser as a light source
B. it captures images from a very thing place of specimen at a time
C. it dissolves the cytoplasm leaving the cell membrane for imaging
D. it collects a series of 2D images to reconstruct a 3D image - answer-C
,The highest resolution of a transmission electron microscope - answer-.002 micrometers
The Basic design of a fluorescence microscope is sown on the right. Which of the following is true?
A. it uses electron breams as the light source
B. The filter 1 Allows a particular wavelength of light to stimulate the fluorescence emission
C. the device 2 is called a condenser which can condense the fluorescent lights to make the signal
brighter
D. you need to stain the specimen with hematoxylin and eosin in order to observe the structure with
fluorescence scope - answer-B
Which of the following is false about IgG antibody?
A. it is a complex formed by 4 subunits
B. IgG is a synthetic molecule created by organic chemistry methods
C. IgG can activate white blood cells to remove pathogens
D. The antigen-binding site has strong affinity to specific antigen - answer-B
Which of the following cannot diffuse across the cell membrane?
A. H+ ion
B. H2O
C. Ethanol
D. CO2 gas - answer-A
Which of the following is true about active transport?
A. it transports solute from low to high concentration
B. it can be done by the carrier and ion channel
C. it usually requires a signal molecule to initiate the transport
D. it happens to those molecules that can freely diffuse across the membrane - answer-A
, Which of the following is false about ion channels?
A. they form aqueous pores on the membrane
B. They transport ions across membrane against concentration gradient
C. they are also called gated ion channels because they need signals to trigger the opening D. they are
highly selective for the ions to pass through - answer-B
When the sodium ion channel is in the inactivated conformation,
A. the ion channel won't respond to any stimulus
B. the membrane potential is at a resting state
C. sodium will flux out of the cell
D. the membrane potential is at -40 mv - answer-A
At the synapse, the electrical signal of an action potential is converted to a chemical signal, which then
travels through the synaptic cleft reaching the receptors on the postsynaptic membrane. Which of the
following is FALSE?
A. the chemical signal is often referred to as the neurotransmitter
B. the calcium in the presynaptic nerve terminal triggers the release of the chemical signal
C. the chemical signal is usually stable and stays in the synaptic cleft for a long time
D. the receptor for the chemical signal is usually an ion channel - answer-C
Which of the following is TRUE about the slow response triggered by a signal molecule?
A. the signal is transduced to cytoplasm only
B. the signal activates transcription of target genes
C. the signal alters cytoskeletal systems
D. the signal molecule is taken into the cell - answer-B
Which of the following is TRUE about the G-protein coupled receptors?
A. they become active when they are bound with GTP
B. they are able to bind DNA and activate the transcription of target genes
