Prepare for NEET Biology Cell Cycle and Cell Division with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert help for mitosis and meiosis understanding.
The genetic material distribution in daughter cells produced by amitosis, compared to the parent cell, is generally:
Exactly identical
Significantly different
Randomly distributed with no predictable pattern
Approximately equal but not necessarily identical
One potential disadvantage of amitosis compared to mitosis is:
Slower cell division rate
Increased energy expenditure
Increased risk of unequal distribution of genetic material
Formation of a complex spindle apparatus
Which of the following accurately describes the role of motor proteins during anaphase of mitosis?
Kinesins move chromosomes towards the minus ends of kinetochore microtubules, and dyneins move chromosomes towards the plus ends.
Dyneins move chromosomes towards the poles along kinetochore microtubules, while kinesins are involved in cytokinesis.
Kinesins move chromosomes towards the plus ends of kinetochore microtubules, while dyneins move the poles apart by acting on astral microtubules.
Both kinesins and dyneins move chromosomes towards the poles along kinetochore microtubules, with kinesins acting on the leading edge and dyneins on the trailing edge.
In a plant cell undergoing mitosis, a mutation disrupts the function of phragmoplastin. Which stage of mitosis will be most directly affected, and what would be the observable consequence?
Prophase; failure of chromosome condensation
Metaphase; misalignment of chromosomes at the metaphase plate
Anaphase; inability of sister chromatids to separate
Cytokinesis; incomplete cell wall formation
Which of the following is NOT a crucial checkpoint control mechanism during Interphase?
Checking for DNA damage before S phase
Verifying DNA replication completion before G2
Ensuring proper spindle fiber attachment
Monitoring cellular resource availability before G1
In a rapidly dividing cell population, a drug inhibiting the synthesis of cyclin D would most directly affect which phase of the cell cycle?
G0
S
G2
G1
If a cell has a mutation that prevents the formation of the pre-replication complex during interphase, which process will be directly impacted?
Chromosome condensation
Spindle fiber formation
Cytokinesis
DNA Replication initiation
A researcher observes a cell with significantly increased heterochromatin formation during interphase. This observation most likely suggests increased:
Transcriptional activity
DNA replication rate
Gene silencing
Protein synthesis
A diploid organism has a mutation affecting the formation of the synaptonemal complex. Which of the following is the MOST likely direct consequence of this mutation during meiosis?
Failure of homologous chromosome pairing
Premature separation of sister chromatids
Impaired crossing over and reduced genetic variation
Inhibition of spindle fiber formation
In a certain species, a reciprocal translocation has occurred between chromosome 1 and chromosome 2. During meiosis in a heterozygote for this translocation, what structure is MOST likely to be observed during Prophase I?
A bivalent
A univalent
A trivalent
A quadrivalent
