MCB Exam 4 – Comprehensive Microbiology & Cell
Biology Exam Questions with 100% Verified
Answers | Complete Exam Review
2026–2027
,For mammalian cells, the key decision-making point that The restriction point
exists toward the end of the G1 phase and that determines
commitment to passage through the cell cycle is known as
In yeast, the main signal(s) that control passage through the availability of nutrients and the cell size
the START point is (are)
MPF stands for _________________and it is a "Maturation Promoting Factor; multisubunit kinase; two different protein
_________________ made of ____________________ components, Cyclin B and Cdk1"
In general, the activation of Cdk1 depends on Its initial association with Cyclin B; kinases and phosphatases
_____________ and the coordinated action of specific
__________________
The main kinases involved in the detection of DNA False
damage during the activation of the checkpoints are p53
and pRb. T/F
The cellular concentration of most ___________ is kept CDK's : cyclinB : Mitosis
fairly constant throughout the cell cycle, whereas the
concentration of ____________ changes dramatically
throughout the cell cycle, becoming fully undetectable after
_______________________
Ultimately, the tight regulatory mechanisms that control normal ploidy and accurate transfer of genetic information
progression through the cell cycle in mammals serve the
purpose of ensuring
_____________________________________
In mammalian cells, interphase is divided into ________ three; G1, S, and G2
different stages, namely _______________
The cell cycle in mammalian cells is divided into two; mitosis and interphase
_________ basic parts, namely
__________________________
Maintained stimulation with growth factors is essential to True
allow the accumulation of sufficient levels of Cyclin D in the
cell, which drives the activation of Cdk4 and Cdk6 and
passage through the restriction point
What are the two main parts of the eukaryotic cell cycle? Mitosis and Interphase
Interphase period of the cell cycle between consecutive mitoses
, What are the three phases of interphase? G1 phase, S phase, G2 phase
What is the exception to going through these 3 phases? Embryogenesis, the fertilized egg undergoes several cycles of cell division without
going through G1 and G2 phases.
Flow cytometer Can measure the amount of DNA/Cell by utilizing a fluorescent dye.
Synchronic cell population All cells on the same stage of cell cycle
asynchronic cell population cells are in mixed stages
What is the main factor that determines the percentage of A. The duration of time in each stage
cells that you observe in each stage?
a. The duration of time in each stage
b. amount of DNA to be replicated
c. The size of the cell
d. age of the cell
A Which graph shows the highest amount of cell death?
How do you read a flow cytometer graph? 1. First tallest peak is G1
2. Dip right after peak is S
3. Next small peak is G2/M
Biology Exam Questions with 100% Verified
Answers | Complete Exam Review
2026–2027
,For mammalian cells, the key decision-making point that The restriction point
exists toward the end of the G1 phase and that determines
commitment to passage through the cell cycle is known as
In yeast, the main signal(s) that control passage through the availability of nutrients and the cell size
the START point is (are)
MPF stands for _________________and it is a "Maturation Promoting Factor; multisubunit kinase; two different protein
_________________ made of ____________________ components, Cyclin B and Cdk1"
In general, the activation of Cdk1 depends on Its initial association with Cyclin B; kinases and phosphatases
_____________ and the coordinated action of specific
__________________
The main kinases involved in the detection of DNA False
damage during the activation of the checkpoints are p53
and pRb. T/F
The cellular concentration of most ___________ is kept CDK's : cyclinB : Mitosis
fairly constant throughout the cell cycle, whereas the
concentration of ____________ changes dramatically
throughout the cell cycle, becoming fully undetectable after
_______________________
Ultimately, the tight regulatory mechanisms that control normal ploidy and accurate transfer of genetic information
progression through the cell cycle in mammals serve the
purpose of ensuring
_____________________________________
In mammalian cells, interphase is divided into ________ three; G1, S, and G2
different stages, namely _______________
The cell cycle in mammalian cells is divided into two; mitosis and interphase
_________ basic parts, namely
__________________________
Maintained stimulation with growth factors is essential to True
allow the accumulation of sufficient levels of Cyclin D in the
cell, which drives the activation of Cdk4 and Cdk6 and
passage through the restriction point
What are the two main parts of the eukaryotic cell cycle? Mitosis and Interphase
Interphase period of the cell cycle between consecutive mitoses
, What are the three phases of interphase? G1 phase, S phase, G2 phase
What is the exception to going through these 3 phases? Embryogenesis, the fertilized egg undergoes several cycles of cell division without
going through G1 and G2 phases.
Flow cytometer Can measure the amount of DNA/Cell by utilizing a fluorescent dye.
Synchronic cell population All cells on the same stage of cell cycle
asynchronic cell population cells are in mixed stages
What is the main factor that determines the percentage of A. The duration of time in each stage
cells that you observe in each stage?
a. The duration of time in each stage
b. amount of DNA to be replicated
c. The size of the cell
d. age of the cell
A Which graph shows the highest amount of cell death?
How do you read a flow cytometer graph? 1. First tallest peak is G1
2. Dip right after peak is S
3. Next small peak is G2/M
