Biology Chapter 7 – Cell Cycle (Class 12) for FSC, Entry Tests & NTS Preparation
Chapter 7, Cell Cycle, is a fundamental topic for Class 12 students preparing for FSC board exams, medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, UET, and NTS exams. This chapter explains the sequence of events that take place in a cell leading to its growth, DNA replication, and division. Understanding the cell cycle is essential for studying cell biology, genetics, and the regulation of cellular processes.
Meiosis occur in
Exchange of segments between homologous chromosomes is called:
UHS 2012
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Synthesis of microtubules increases in:
UHS 2018
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Crossing over occur between ____________ of homologous chromosomes:
PMC Sample 1
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From each pair of centrioles ________ sets of microtubules originate
Crossing over is an exchange of genes between _______ resulting in a mixture of parental characteristics in offspring.
NTS 2019
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If a person has 44 autosomes + XXY, he will suffer from
UHS 2012
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Most critical phase of mitosis is
Which is a feature of malignant tumor?
Crossing over takes place during _____ of meiosis.
UHS 2018
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During interphase of the cell cycle, which of the following stage is for duplication of DNA:
NUMS 2019 Reconduct
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At what phase the DNA content of a cell is doubled?
PMC 2020
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The second stage of the Prophase of Meiosis, following Leptotene, during which homologous chromosomes begin to pair is called:
NTS 2019
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Reduction division is:
NUMS 2015
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During anaphase, each chromosome has:
PMC 2021 Tested
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Spread of tumor cells and establishment of secondary areas of growth is
In which stage of meiotic division centromere divides?
NUMS 2017
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Gametes in animals are produced by:
PMC 2021 Tested
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Diplotene is the sub-stage of:
NTS 2011
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How does the second meiotic division differ from mitosis? In the second meiotic division:
NTS 2015 SMBBMC
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Gametes are produced by:
PMC 2021 Tested
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Reverse of prophase is
The term bivalent means:
NUMS 2014
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The phase of mitosis in which sister chromatids move towards opposite poles:
UHS 2019
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Synaptonemal complex helps in:
NUMS 2014
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Bac
In meiosis II, ______ differentiate into sperms.
NUMS 2019 Reconduct
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Microtubule subunits (for spindle fibers) are synthesized in _______ phase.
UHS 2019
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DNA is synthesized and chromosome number is doubled in
During the G2 phase:
UHS 2019
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Failure of separation of sister chromatids is called:
NUMS 2020
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Asexual offsprings can be produced by:
PMC 2021 Tested
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Microtubules are composed of
In case of neurons, post mitotic cell escapes cell cycle and remain in _______ phase whthout proliferating further
Which of the following cells does not enter G0 phase?
NUMS 2020
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Interphase is a phase of the cell cycle defined only by the absence of _______.
NTS 2019
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During cell division, the spindle fibres get attached to condensing chromosome at a highly differentiated region. This region is called as:
NTS 2019
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Which statement is not true about phragmoplast?
Condensation of chromosomes reaches to the maximum during:
NUMS 2015
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Which of the following statements is true about metaphase?
PMC 2021 Tested
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Chance of a cross over between two loci is directly proportional to their
UHS 2018
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_______ is the stage of mitosis characterized by the physical separation of ________ chromatids.
NTS 2019
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In plants mitotic apparatus consists of
A special area of centromere with specific base arrangement and specific proteins where spindle fibers are attached is called
In gametogenesis, which resultant product is non-functional?
NTS 2019
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Process of uncontrolled cell division is due to which one of the following reasons?
NUMS 2018
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Smooth endoplasmic reticulum is responsible for the metabolism of:
UHS 2019
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Which of the following sub stages does not occur in prophase I?
NTS 2015 SMBBMC
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_______ is the most critical phase of mitosis.
NUMS 2015
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Which of the following is NOT true for meiosis?
NUMS 2019 Reconduct
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Mitosis occurs in
At the beginning of nuclear division, the number of microtubule triplets in two pairs of centrioles that migrate to opposite poles are:
UHS 2015
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Which of the following statements concerning nucleolus is correct?
NTS 2014
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Period between two consecutive divisions is called
Which statement is incorrect?
During meiosis, the homologous chromosomes come together and form pairs, this process is called:
PMC 2020
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Interphase of meiosis lacks
Each kinetochore gets ________ fibers in mitosis
During which stage of meiosis do centromeres divide?
NTS 2016 DUHS & JSMU
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Mitotic apparatus in animals is formed by
Gametes in animals are produced by which of the following?
PMC Practice 2
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During the formation of an ovum nondisjunction of the sex chromosomes occurred the ovum was then fertilized by a normal Y-bearing sperm cell which one of the following shows the sex chromosome complement of the resulting zygote?
NTS 2015 DUHS and JSMU
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Which of the following is a type of cell division that plays an important role in evolution?
NTS 2019
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Feature of cancer cells in common?
Meiosis occurs at the time of
Key Concepts about the Cell Cycle
The chapter explains the phases of the cell cycle, including interphase (G1, S, and G2 phases), mitotic phase (prophase, metaphase, anaphase, telophase), and cytokinesis. It covers the regulation of the cell cycle, including checkpoints, cyclins, and cyclin-dependent kinases. The chapter also discusses the significance of the cell cycle in growth, development, and cancer. Each concept is explained with examples, mechanisms, and biological importance. These concepts are highly important for FSC board exams, medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, UET, and NTS.
Free Entry Test & NTS Preparation
Mastery of the cell cycle helps students understand cell division, regulation, and cellular organization. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.
JazakAllah.
