Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Cell Cycle and Cell Division Test - 31

Result Self Studies

Cell Cycle and Cell Division Test - 31
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Chromosomal morphology (structure) is best observed at 
    Solution

    Chromosomal morphology is best observed at metaphase. Metaphase is a stage of mitosis in the cell cycle in which chromosomes are at their most condensed and coiled stage. These chromosomes, carrying genetic information, align in the equator of the cell before being separated into each of the two daughter cells. The structure of chromosomes is quite clear at this phase of the cell cycle. So, the correct answer is 'Metaphase'.

  • Question 2
    1 / -0
    The two conical half spindles, are found in which of the following phase? 
    Solution
    The two conical half spindles are the unique feature of metaphase. When the two half spindles are identical, the spindle is called as symmetrical. When they are nonidentical or nonequal. the spindle is termed as nonsymmetrical. At metaphase, there are two conical half-spindles focused on the basal body complexes and terminating at the chromosomal plate.
    So, the correct answer is option B.
  • Question 3
    1 / -0
    The synthesis and storage of ATP molecules required for cell division takes place in 
    Solution
    The synthesis and storage of ATP molecules required for cell division take place in G$$_2$$ phase. G$$_2$$ phase, or pre-mitotic phase is the third and final subphase of Interphase in the cell cycle directly preceding Mitosis. It follows the successful completion of S phase, during which the cell's DNA is replicated. G$$_2$$ phase ends with the onset of prophase, the first phase of mitosis in which the cell's chromatin condenses into chromosomes. G$$_2$$ phase is a period of rapid cell growth and protein synthesis during which the cell readies itself for mitosis.  So, the correct answer is option D.
  • Question 4
    1 / -0
    DNA replication is found in
    Solution
    • Mitosis is a eukaryotic process, that requires the copying and separation of each chromosome.

    • In meiosis I, it takes two full cell cycles to complete meiosis, which results in one grandparent cell giving rise to four granddaughter cells either gametes or spores, depending on the species. It involves DNA replication.

    • In meiosis II, the centromeres connecting each set of chromatids dissolve and one set of chromosomes is distributed to each granddaughter cell. 

    • During fertilization, two haploid sex cells unite to restore the diploid number in the fertilized egg. There is no replication of DNA in meiosis II.

    So, the correct answer is option A.
  • Question 5
    1 / -0
    Which of the following phase is a pre-DNA synthesis phase? 
    Solution
    The G$$_1$$ phase, is the first step of the interphase during the cell division. During this phase, the cell grows in size and synthesizes mRNA and proteins in preparation for subsequent steps leading to mitosis. G$$_1$$ phase ends when the cell moves into the S phase of interphase. During G$$_1$$ phase, the cell grows in size and synthesizes mRNA and proteins that are required for DNA synthesis. DNA synthesis occurs in S phase which happens after G$$_1$$ phase. So, G$$_1$$ phase is called as pre-DNA synthesis phase. S phase is the DNA synthesis phase. G$$_2$$ and prophase are not called as pre-DNA synthesis phase. 
    So, the correct answer is option A.
  • Question 6
    1 / -0
    Which stage of cell cycle is characterised by DNA replication, synthesis of histones and formation of new nucleosomes?
    Solution
    S phase of interphase is involved in DNA replication, synthesis of histones and formation of new nucleosomes. S phase (synthesis phase) is the part of the cell cycle in which DNA is replicated. It occurs between G$$_1$$ phase and G$$_2$$ phase. DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease.
    So, the correct answer is option A.
  • Question 7
    1 / -0
    Meiosis results in
    Solution
    Meiosis is a specialized type of cell division which reduces the chromosome number by half. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II. Because the number of chromosomes is halved during meiosis, this allows gametes to fuse to form a zygote containing a mixture of paternal and maternal chromosomes. Thus, meiosis and fertilization facilitate sexual reproduction with successive generations maintaining the same number of chromosomes.
  • Question 8
    1 / -0
    The M phase of cell cycle consist of
    Solution
    The M phase of the cell division is also known as a mitotic phase. It is characterized by  karyokinesis. It is a relatively short period of the cell cycle. M phase is complex and highly regulated. The sequence of events is divided into phases, corresponding to the completion of one set of activities and the start of the next. These phases are sequentially known as prophase, metaphase, anaphase and telophase.
    So, the correct answer is option B.
  • Question 9
    1 / -0
    The nuclear spindle ..
    Solution
    Spindle fibers help in the movement of chromosomes during division. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division - mitosis and meiosis. 
    At the beginning of nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of the cell forming cell poles. Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle. Some of the microtubules attach the poles to the chromosomes by connecting to protein complexes called kinetochores. Kinetochores are protein formations that develop on each chromosome around the centromere, which is a region located near the middle of a chromosome. Other microtubules bind to the chromosome arms or extend to the opposite end of the cell. Amitosis is direct cell division by simple cleavage of the nucleus, without spindle formation or the appearance of chromosomes. 
    So, the correct answer is option D.
  • Question 10
    1 / -0
    What happens during telophase?
    Solution
    During telophase nuclear membrane is formed, nucleolus appears and astral rays disappear. During telophase, the effects of prophase and prometaphase - the nuclear membrane and nucleolus disintegrating are reversed. Two daughter nuclei form in each daughter cell, and phosphatases dephosphorylate the nuclear lamins at the ends of the cell, forming nuclear envelopes around each nucleus.
    So, the correct answer is option D.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now