Welcome to the 12th Class Biology Chapter 21 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 12th Class Biology Chapter 21 Cell Cycle.
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The cell cycle consists of two main phases: interphase and .
a) Mitosis
b) Cytokinesis
c) Prophase
d) Telophase
During which phase of the cell cycle does DNA replication occur?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
The process of cell division that divides the cytoplasm and forms two daughter cells is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
In which phase of mitosis do the sister chromatids separate and move towards opposite poles of the cell?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The G1, S, and G2 phases collectively make up which stage of the cell cycle?
a) Interphase
b) Mitosis
c) Cytokinesis
d) Meiosis
Which checkpoint in the cell cycle ensures that all chromosomes are properly attached to the spindle fibers before the cell proceeds to anaphase?
a) G1 checkpoint
b) G2 checkpoint
c) M checkpoint
d) S checkpoint
In which phase of mitosis do the nuclear envelope and nucleolus reappear, and the spindle apparatus disassembles?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The G0 phase of the cell cycle is a resting phase for cells that are not actively dividing. It is often associated with which type of cells?
a) Stem cells
b) Nerve cells
c) Muscle cells
d) Liver cells
The process of cell division that produces four haploid daughter cells, each with half the number of chromosomes as the parent cell, is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
In which phase of the cell cycle does the cell prepare for mitosis, and the centrioles duplicate?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
Which phase of mitosis involves the alignment of chromosomes at the cell’s equatorial
plane?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The cell cycle is regulated by a family of proteins called, which control the progression of the cell through the different phases.
a) Hormones
b) Cytokines
c) Cyclins
d) Enzymes
The G1 checkpoint in the cell cycle ensures that:
a) DNA is correctly replicated
b) Chromosomes are aligned at the equatorial plane
c) DNA damage is repaired before cell division
d) Sister chromatids separate during anaphase
Which of the following is NOT a phase of mitosis?
a) Prophase
b) Interphase
c) Anaphase
d) Telophase
During which phase of mitosis do the chromosomes condense, and the nuclear envelope begins to break down?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
Which of the following is a protein structure that helps to organize and separate the chromosomes during cell division?
a) Centrosome
b) Cytoskeleton
c) Nucleolus
d) Golgi apparatus
The process of cell division that results in two daughter cells with the same number of chromosomes as the parent cell is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
The G2 checkpoint in the cell cycle ensures that:
a) DNA is correctly replicated
b) Chromosomes are aligned at the equatorial plane
c) DNA damage is repaired before cell division
d) All chromosomes are attached to the spindle fibers
Which phase of the cell cycle is characterized by the cell’s preparation for division and the synthesis of proteins and organelles?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
The process of cytokinesis in animal cells involves the formation of a contractile ring made of .
a) Microtubules
b) Microfilaments (actin)
c) Intermediate filaments
d) Centrioles
The G1 checkpoint in the cell cycle is also known as the checkpoint.
a) Restriction point
b) Checkpoint Charlie
c) Mitotic checkpoint
d) G2 checkpoint
In which phase of mitosis do the sister chromatids align at the cell’s equatorial plane?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The process of cytokinesis in plant cells involves the formation of a cell plate, which eventually develops into a .
a) Cell wall
b) Cell membrane
c) Centriole
d) Nucleus
The protein complex responsible for aligning and attaching the sister chromatids to the spindle fibers is called .
a) Centrosome
b) Centriole
c) Kinetochores
d) Nucleolus
The G2 checkpoint in the cell cycle ensures that:
a) DNA is correctly replicated
b) Chromosomes are aligned at the equatorial plane
c) DNA damage is repaired before cell division
d) Sister chromatids separate during anaphase
Which phase of mitosis is characterized by the formation of the mitotic spindle and the condensation of chromosomes?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
During which phase of mitosis do the sister chromatids separate and move towards opposite poles of the cell?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The process of cell division that produces four haploid daughter cells, each with half the number of chromosomes as the parent cell, is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
In which phase of the cell cycle does the cell prepare for mitosis, and the centrioles duplicate?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
Which checkpoint in the cell cycle ensures that all chromosomes are properly attached to the spindle fibers before the cell proceeds to anaphase?
a) G1 checkpoint
b) G2 checkpoint
c) M checkpoint
d) S checkpoint
In which phase of mitosis do the nuclear envelope and nucleolus reappear, and the spindle apparatus disassembles?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The G0 phase of the cell cycle is a resting phase for cells that are not actively dividing. It is often associated with which type of cells?
a) Stem cells
b) Nerve cells
c) Muscle cells
d) Liver cells
The process of cell division that results in two daughter cells with the same number of chromosomes as the parent cell is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
The G1, S, and G2 phases collectively make up which stage of the cell cycle?
a) Interphase
b) Mitosis
c) Cytokinesis
d) Meiosis
In which phase of mitosis do the chromosomes condense, and the nuclear envelope begins to break down?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The G1 checkpoint in the cell cycle is also known as the checkpoint.
a) Restriction point
b) Checkpoint Charlie
c) Mitotic checkpoint
d) G2 checkpoint
Which of the following is NOT a phase of mitosis?
a) Prophase
b) Interphase
c) Anaphase
d) Telophase
During which phase of mitosis do the sister chromatids align at the cell’s equatorial plane?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The process of cytokinesis in animal cells involves the formation of a contractile ring made of .
a) Microtubules
b) Microfilaments (actin)
c) Intermediate filaments
d) Centrioles
Which phase of the cell cycle is characterized by the cell’s preparation for division and the
synthesis of proteins and organelles?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
The process of cytokinesis in plant cells involves the formation of a cell plate, which eventually develops into a .
a) Cell wall
b) Cell membrane
c) Centriole
d) Nucleus
The protein complex responsible for aligning and attaching the sister chromatids to the spindle fibers is called .
a) Centrosome
b) Centriole
c) Kinetochores
d) Nucleolus
The G2 checkpoint in the cell cycle ensures that:
a) DNA is correctly replicated
b) Chromosomes are aligned at the equatorial plane
c) DNA damage is repaired before cell division
d) All chromosomes are attached to the spindle fibers
Which phase of mitosis is characterized by the formation of the mitotic spindle and the condensation of chromosomes?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
During which phase of mitosis do the sister chromatids separate and move towards opposite poles of the cell?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The process of cell division that produces four haploid daughter cells, each with half the number of chromosomes as the parent cell, is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
In which phase of the cell cycle does the cell prepare for mitosis, and the centrioles duplicate?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
Which checkpoint in the cell cycle ensures that all chromosomes are properly attached to the spindle fibers before the cell proceeds to anaphase?
a) G1 checkpoint
b) G2 checkpoint
c) M checkpoint
d) S checkpoint
In which phase of mitosis do the nuclear envelope and nucleolus reappear, and the spindle apparatus disassembles?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The G0 phase of the cell cycle is a resting phase for cells that are not actively dividing. It is often associated with which type of cells?
a) Stem cells
b) Nerve cells
c) Muscle cells
d) Liver cells
The process of cell division that results in two daughter cells with the same number of chromosomes as the parent cell is called .
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Interphase
The G1, S, and G2 phases collectively make up which stage of the cell cycle?
a) Interphase
b) Mitosis
c) Cytokinesis
d) Meiosis
In which phase of mitosis do the chromosomes condense, and the nuclear envelope begins to break down?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The G1 checkpoint in the cell cycle is also known as the checkpoint.
a) Restriction point
b) Checkpoint Charlie
c) Mitotic checkpoint
d) G2 checkpoint
Which of the following is NOT a phase of mitosis?
a) Prophase
b) Interphase
c) Anaphase
d) Telophase
During which phase of mitosis do the sister chromatids align at the cell’s equatorial plane?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
The process of cytokinesis in animal cells involves the formation of a contractile ring made of .
a) Microtubules
b) Microfilaments (actin)
c) Intermediate filaments
d) Centrioles
Which phase of the cell cycle is characterized by the cell’s preparation for division and the
synthesis of proteins and organelles?
a) G1 phase
b) S phase
c) G2 phase
d) M phase
The process of cytokinesis in plant cells involves the formation of a cell plate, which eventually develops into a .
a) Cell wall
b) Cell membrane
c) Centriole
d) Nucleus
The protein complex responsible for aligning and attaching the sister chromatids to the spindle fibers is called .
a) Centrosome
b) Centriole
c) Kinetochores
d) Nucleolus
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