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RN Pre-Entrance Exam ,Biology practice questions , challenging multiple-choice questions for each of these three categories: Cell Division, Ecology, and Evolution. Each question includes a correct answer and an explanation.$16.49
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RN Pre-Entrance Exam ,Biology practice questions , challenging multiple-choice questions for each of these three categories: Cell Division, Ecology, and Evolution. Each question includes a correct answer and an explanation.
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RN Pre-Entrance Exam ,Biology practice questions , challenging multiple-choice questions for each of these three categories: Cell Division, Ecology, and Evolution. Each question includes a correct answer and an explanation. PAX-RN, Review guide for pre-entrance exam, PAX-RN secrets study guide, Mc...
RN Pre-Entrance Exam ,Biology practice questions , challenging multiple-choice
questions for each of these three categories: Cell Division, Ecology, and Evolution. Each
question includes a correct answer and an explanation.
Cell Division
1. Which phase of mitosis is characterized by the alignment of chromosomes along
the equatorial plane of the cell?
o A) Prophase
o B) Metaphase
o C) Anaphase
o D) Telophase
Answer: B) Metaphase
Explanation: During metaphase, chromosomes align at the cell's equatorial plane,
known as the metaphase plate, in preparation for separation.
2. In which phase of meiosis does crossing over occur?
o A) Prophase I
o B) Metaphase I
o C) Anaphase I
o D) Telophase II
Answer: A) Prophase I
Explanation: Crossing over, or recombination, occurs during Prophase I of meiosis,
allowing for genetic diversity.
3. Which of the following best describes nondisjunction?
o A) Failure of chromosomes to replicate before cell division
o B) Failure of chromosomes to separate properly during cell division
o C) Excessive genetic material due to DNA replication errors
o D) Unequal distribution of organelles in daughter cells
Answer: B) Failure of chromosomes to separate properly during cell division
Explanation: Nondisjunction occurs when chromosomes or chromatids fail to
separate correctly during meiosis or mitosis, leading to aneuploidy.
4. Which checkpoint of the cell cycle ensures that DNA replication is complete and
that no damage is present before cell division proceeds?
o A) G1 Checkpoint
o B) G2 Checkpoint
o C) Metaphase Checkpoint
o D) Anaphase Checkpoint
Answer: B) G2 Checkpoint
Explanation: The G2 checkpoint verifies that DNA replication is complete and that
the cell is ready for mitosis.
, 5. How many unique daughter cells are produced at the end of meiosis?
o A) Two
o B) Four
o C) Eight
o D) Sixteen
Answer: B) Four
Explanation: Meiosis produces four genetically unique daughter cells, each with half
the number of chromosomes as the original cell.
6. Which of the following is a key difference between mitosis and meiosis?
o A) Mitosis produces diploid cells, whereas meiosis produces haploid cells.
o B) Meiosis occurs in somatic cells, while mitosis occurs in germ cells.
o C) Mitosis involves two rounds of division, while meiosis involves one.
o D) Meiosis produces identical daughter cells, whereas mitosis produces
genetically diverse cells.
Answer: A) Mitosis produces diploid cells, whereas meiosis produces haploid cells.
Explanation: Mitosis results in two diploid daughter cells, while meiosis results in
four haploid cells, essential for sexual reproduction.
7. During which stage of mitosis do sister chromatids separate and move toward
opposite poles of the cell?
o A) Prophase
o B) Metaphase
o C) Anaphase
o D) Telophase
Answer: C) Anaphase
Explanation: Anaphase is when sister chromatids separate and are pulled toward
opposite poles by the spindle fibers.
8. What is the primary role of the spindle apparatus during cell division?
o A) DNA replication
o B) Chromosome alignment and separation
o C) Cytokinesis
o D) RNA transcription
Answer: B) Chromosome alignment and separation
Explanation: The spindle apparatus helps align chromosomes at the metaphase plate
and ensures their correct separation during cell division.
9. What structure forms during prophase I of meiosis and is crucial for genetic
recombination?
o A) Centromere
o B) Tetrad
o C) Centriole
o D) Spindle Fiber
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