Cell division/Mitosis Flashcards
(16 cards)
Which of the following is NOT a function of cell division?
A. Replacement of aged or died cells.
B. Production of gametes for sexual reproduction.
C. Regulation of cell cycle progression.
D. Growth and development of multicellular organisms.
C. Regulation of cell cycle progression.
During which phase of the cell cycle does DNA synthesis occur
A. M phase
B. G1 phase
C. S phase
D. G2 phase
Where do spindle fibres attach to on the chromosomes during metaphase?
A. Kinetochore
B. Kinetosome
C. Centromere
D. Telomere
A. Kinetochore
Which of the following is a characteristic of meiosis but NOT of mitosis?
A. Production of two daughter cells.
B. Reduction in chromosome number.
C. Formation of a cleavage furrow during cytokinesis.
D. Presence of checkpoints to regulate the process.
B. Reduction in chromosome number.
Which of the following statements accurately describes the role of cyclins in cell cycle regulation?
A. Cyclins are enzymes that phosphorylate target proteins to trigger specific cell cycle events.
B. Cyclins are regulatory proteins that remain at constant levels throughout the cell cycle.
C. Cyclins bind to CDKs, activating them to drive cell cycle progression.
D. Cyclins are primarily involved in the regulation of cytokinesis.
C. Cyclins bind to CDKs, activating them to drive cell cycle progression.
Which checkpoint in the cell cycle is primarily responsible for checking if the cell has grown sufficiently and the environment is favourable before DNA replication?
A. G1 Checkpoint
B. G2 Checkpoint
C. Metaphase Checkpoint
D. G0 Phase
A. G1 Checkpoint
What is the function of the phragmoplast in plant cell division?
A. Formation of the cleavage furrow.
B. Condensation of chromatin into chromosomes
C. Assembly of the cell plate during cytokinesis.
D. Attachment of spindle fibres to kinetochores.
C. Assembly of the cell plate during cytokinesis.
Which of the following is a potential consequence of errors in mitosis?
A. Production of haploid gametes.
B. Increased genetic diversity within a population.
C. Chromosomal alterations leading to abnormalities.
D. Normal growth and development of an organism.
C. Chromosomal alterations leading to abnormalities.
Cancer cells are often characterised by their ability to:
A. Respond normally to the body’s control mechanisms.
B. Cease division when nutrients are exhausted.
C. Exhibit density-dependent inhibition.
D. Invade other tissues and divide excessively.
D. Invade other tissues and divide excessively.
A researcher is studying the effects of a new drug on cancer cell proliferation. The drug is designed to inhibit the activity of CDK1.Which phase of the cell cycle is most likely to be directly affected by this drug?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
D. M phase
What could be a potential consequence of inhibiting CDK1 activity in healthy cells?
A. Increased cell proliferation and tumour formation.
B. Disruption of DNA replication and repair mechanisms.
C. Impaired cell growth and tissue regeneration.
D. Enhanced immune response against pathogens.
C. Impaired cell growth and tissue regeneration.
A student is observing onion root tip cells under a microscope to study the different stages of mitosis.The student observes a cell with condensed chromosomes aligned at the centre of the cell. Which stage of mitosis is the student observing?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
B. Metaphase
In another cell, the student notices the formation of a cell plate. What can the student conclude about this cell?
A. The cell is undergoing mitosis.
B. The cell is a plant cell.
C. The cell is in the G1 phase of the cell cycle.
D. The cell has undergone non-disjunction.
B. The cell is a plant cell.
Which of the following stains would be most useful for visualizing chromosomes during mitosis?
A. Haematoxylin stain
B. Eosin stain
C. Silver stain
D. Gram stain
C. Silver stain
A genetic counsellor is explaining the importance of meiosis to a couple planning to have children. Which of the following statements best describes the significance of meiosis in sexual reproduction?
A. Meiosis produces genetically identical daughter cells for growth and repair.
B. Meiosis reduces the chromosome number by half, ensuring genetic diversity in offspring.
C. Meiosis is responsible for the replication of DNA prior to cell division.
D. Meiosis allows for the transmission of acquired traits from parents to offspring.
B. Meiosis reduces the chromosome number by half, ensuring genetic diversity in offspring.
