Cell Cycle Class 12 MCQ: Class 12 Biology MCQ Questions and Answer. Students get here all Important MCQ on Cell Cycle Class 12.
Cell Cycle Class 12 MCQ with Answers:
(1) The cell undergoes a sequence of changes called as
(a) Interphase
(b) metaphase
(c) Cell cycle
(d) mitosis
Ans: (c) Cell cycle
(2) Which of these events is not part of karyokinesis
(a) metaphase
(b) prophase
(c) Interphase
(d) Anaphase
Ans: (c) Interphase
(3) In which phase is chromosome condensation initiated
(a) Prophase
(b) Telophase
(c) metaphase
(d) Anaphase
Ans: (a) Prophase
(4) How many hours does the m – phase take to complete a cycle?
(a) 11 hrs
(b) 8 hr
(c) 4 hrs
(d) 1 hrs
Ans: (d) 1 hrs
(5) Name State the where never dividing cells of neurons & Skeletal muscle present?
(a) GO
(b) G1
(c) G2
(d) M
Ans: (a) GO
(6) Mitosis can occur both in
(a) diploid & haploid cells
(b) prophase & metaphase
(c) Anaphase & Telophase
(d) Interphase & Anaphase
Ans: (a) diploid & haploid cells
(7) In all cycle DNA Synthesis take place during
(a) G1 phase
(b) G2 phase
(c) 8 phase
(d) Prophase
Ans: (c) 8 phase
(8) Zygotic meiosis occurs in
(a) Chalmydomonus
(b) Pteris
(c) Puccinia
(d) Marchantia
Ans: (a) Chalmydomonus
(9) Synapsis occurs between
(a) a male & female gamete
(b) MRNA & ribosomes
(c) spindle fibres & centromere
(d) two homologues Chromosome
Ans: (d) two homologues Chromosome
(10) In a Somatic cell cycle, DNA synthesis take place
(a) G1 phase
(b) G2 prophase
(c) S – phase
(d) Prophase of mitosis
Ans: (c) S – phase
(11) Which typical stage is known for DNA replication
(a) S – phase
(b) G1 phase
(c) G2 phase
(d) metaphase
Ans: (a) S – phase
(12) Cell plate formation is present in
(a) bacteria cell
(b) viruses
(c) animal cell
(d) plant cell
Ans:
(13) Microtubule is involved in the
(a) membrane concentration
(b) DNA recognition
(c) Cell division
(d) muscle concentration
Ans: (c) Cell division
(14) In which phase of cell cycle is DNA replicated?
(a) G1 phase
(b) S – phase
(c) G2 phase
(d) M – phase
Ans: (b) S – phase
(15) There are ____ major phase in a cell cycle
(a) 1
(b) 2
(c) 3
(d) 4
Ans: (b) 2
(16) DNA replication can be monitored by incorporation of
(a) tyrosine
(b) Thymidine
(c) Cytosine
(d) nitrite
Ans: (b) Thymidine
(17) Which of the following all do not lack the ability to divide?
(a) Skin cells
(b) nerve cells
(c) muscle cells
(d) red blood cells
Ans: (a) Skin cells
(18) Which of the following cells do not usually divide but can be induced to divide?
(a) red blood cells
(b) liver cells
(c) hair cells
(d) hair follicles
Ans: (b) liver cells
(19) Which of the following cells are capable of asymmetric cell division?
(a) Hepatocytes
(b) Epithelial cells
(c) Stem cells
(d) neurons
Ans: (c) Stem cells
(20) Duplication of Centrosomes takes place in which of the following phase?
(a) S – Phase
(b) GO phase
(c) G1 phase
(d) None of these
Ans: (a) S – Phase
(21) Division of the cytoplasm is considered as the
(a) mitosis
(b) Cytokinesis
(c) Synapsis
(d) None of these
Ans: (b) Cytokinesis
(22) The characteristic of which of the following stage of mitosis is the separation of sister chromatids?
(a) metaphase
(b) Telophase
(c) Anaphase
(d) None of these
Ans: (c) Anaphase
(23) What triggers apoptosis?
(a) DNA damage
(b) Cell stress
(c) developmental signals
(d) All of the above
Ans: (d) All of the above
(24) What is the role of mitochondria in apoptosis?
(a) To promote cell growth
(b) To produce ATP
(c) To regulate apoptosis through the release of pro – apoptotic factors
(d) None of the above
Ans: (c) To regulate apoptosis through the release of pro – apoptotic factors
(25) What is apoptosis?
(a) A type of cell growth
(b) A type of cell death
(c) A type of cell division
(d) A type of cell communication
Ans: (b) A type of cell death
(26) A Poptotic cells detach due to the inactivation of this
(a) PKC
(b) PKB
(c) RAF1
(d) FAK
Ans: (d) FAK
(27) This is an active cell death process
(a) necrosis
(b) Lysis
(c) apoptosis
(d) Senescence
Ans: (c) apoptosis
(28) This cell organelle participates actively in animal apoptosis?
(a) nucleus
(b) vacuoles
(c) Mitochondria
(d) Chloroplast
Ans: (c) Mitochondria
(29) This cannot be killed by apoptosis
(a) immune cells
(b) cells with DNA damage
(c) Cancer cells
(d) cell infected with virus
Ans: (c) Cancer cells
(30) Shrinking of nucleus is caused when this inactivates
(a) Gelsolin
(b) tubule in
(c) actin
(d) Lamin
Ans: (d) Lamin
(31) This is concerned with the intrinsic pathway of apoptosis?
(a) Cytochrome d
(b) Cytochrome C
(c) Cytochrome b
(d) Cytochrome a
Ans: (b) Cytochrome C
(32) Apoptotic bodies can be recognized with the presence of these on the surface
(a) Phosphatidyal tyrosine
(b) Phosphatidylinositol
(c) Phosphatidylcholine
(d) Phosphatidylserine
Ans: (d) Phosphatidylserine
(33) Pairing of homologues chromosomes can be seen during
(a) Zygotene
(b) leptone
(c) Diplotene
(d) Pachytene
Ans: (a) Zygotene
(34) During metaphase mitosis chromosomes
(a) Undergo coiling
(b) move towards the pole
(c) Line up the equator
(d) Break & disintegrate
Ans: (c) Line up the equator
(35) During meiosis chiasmata are observed at
(a) Pachytene
(b) Diplotene
(c) Leptotene
(d) Diakinesis
Ans: (a) Pachytene
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