#1
Which process ensures genetic diversity in sexually reproducing organisms?
Mitosis
Meiosis
Binary fission
Budding
#2
During which phase of the cell cycle does DNA replication occur?
G1 phase
S phase
G2 phase
M phase
#3
In which phase of the cell cycle do cells spend most of their time?
G1 phase
S phase
G2 phase
M phase
#4
What happens during the G2 phase of the cell cycle?
DNA replication occurs
The cell prepares for mitosis
Cell division takes place
The cell grows and prepares for DNA replication
#5
Which phase of the cell cycle follows mitosis in the sequence of events?
G1 phase
S phase
G2 phase
Interphase
#6
What is the purpose of spindle fibers during cell division?
To form the cell plate in plant cells
To separate sister chromatids during anaphase
To produce ATP for cellular energy
To protect the cell membrane
#7
Which of the following is NOT a phase of mitosis?
Prophase
Telophase
Interphase
Metaphase
#8
Which of the following accurately describes the function of centrioles in animal cells during cell division?
They produce spindle fibers
They help in DNA replication
They synthesize proteins
They store genetic information
#9
What is the main difference between cytokinesis in plant cells and animal cells?
Plant cells form a cell plate, while animal cells form a cleavage furrow
Animal cells divide by binary fission, while plant cells divide by mitosis
Animal cells have centrioles, while plant cells do not
Plant cells undergo meiosis, while animal cells undergo mitosis
#10
Which checkpoint in the cell cycle ensures that DNA is undamaged before proceeding to mitosis?
G1 checkpoint
G2 checkpoint
S checkpoint
M checkpoint
#11
During which phase of mitosis do sister chromatids separate and move towards opposite poles of the cell?
Prophase
Metaphase
Anaphase
Telophase
#12
Which of the following accurately describes the ploidy of daughter cells produced by mitosis?
Haploid daughter cells
Diploid daughter cells
Tetraploid daughter cells
Triploid daughter cells
#13
What is the role of the kinetochore during cell division?
It helps in the formation of the spindle fibers
It holds sister chromatids together
It attaches spindle fibers to chromosomes
It synthesizes ATP
#14
Which of the following is characteristic of meiosis but not mitosis?
Sister chromatids separate during anaphase
Two rounds of division occur
Homologous chromosomes pair up during prophase
A cleavage furrow forms during cytokinesis
#15
What is the significance of crossing over during meiosis?
It ensures that homologous chromosomes separate correctly
It creates genetic diversity among offspring
It prevents nondisjunction
It stops the cell cycle
#16
Which of the following statements about gametes is correct?
They are diploid cells
They are produced by mitosis
They undergo meiosis to become haploid
They are identical to somatic cells
#17
What is the purpose of the G1 checkpoint in the cell cycle?
To check for DNA damage
To ensure DNA replication is complete
To monitor spindle fiber attachment
To assess cell size and nutrient availability
#18
Which of the following accurately describes a difference between prokaryotic and eukaryotic cell division?
Prokaryotes undergo meiosis, while eukaryotes undergo mitosis
Prokaryotic cells do not undergo cytokinesis, while eukaryotic cells do
Prokaryotic cells have a nucleus, while eukaryotic cells do not
Prokaryotic cells have a single circular chromosome, while eukaryotic cells have multiple linear chromosomes
#19
During which phase of meiosis do homologous chromosomes pair up and exchange genetic material?
Prophase I
Metaphase I
Anaphase I
Telophase I
#20
What is the role of the spindle apparatus during cell division?
To synthesize DNA
To separate sister chromatids
To package DNA into chromosomes
To regulate the cell cycle
#21
Which of the following events occurs during telophase of mitosis?
Chromosomes condense
Spindle fibers disassemble
Nuclear envelopes form around chromosomes
Sister chromatids separate
#22
What is the significance of cytokinesis in the cell cycle?
It separates the replicated DNA into two identical daughter cells
It ensures the correct alignment of chromosomes
It initiates DNA replication
It marks the beginning of mitosis
#23
What is the function of cyclins and cyclin-dependent kinases (CDKs) in the regulation of the cell cycle?
They prevent DNA replication
They induce apoptosis
They promote cell division
They inhibit protein synthesis
#24
What is the primary function of the anaphase-promoting complex (APC) during the cell cycle?
To activate cyclin-dependent kinases (CDKs)
To degrade cyclins and trigger exit from mitosis
To initiate DNA replication
To repair DNA damage
#25
What is the consequence of a mutation in a tumor suppressor gene?
Uncontrolled cell division
Apoptosis
Repair of DNA damage
Inhibition of cell division