Cell Cycle

Eukaryotic cells are classified as either diploid or haploid, depending upon the number of copies of DNA they possess in the form of chromosomes. A haploid cell, which contains only a single copy of each chromosome, is depicted dividing by mitosis to produce two identical daughter cells. This cycle is interrupted when one haploid cell encounters another and mating occurs, forming a diploid zygote with two copies of each chromosome. The new diploid cell grows and divides mitotically, forming two identical diploid daughter cells. One of these cells undergoes meiosis, a process which reduces the number of chromosomes by half and forms four haploid spore cells.

Question 1: What are the two types of eukaryotic cells that differ in their DNA copy number?
  1. Bacteria and archaea
  2. Mitochondira and chloroplasts
  3. Diploid and haploid
  4. Plants and animals


Answer 1

Answer - (c) Diploid and Haploid

Question 2: A _________ cell, that contains only a single copy of each chromosome, divides by ________ to produce two identical daughter cells?
  1. mitosis, haploid
  2. haploid, mitosis
  3. diploid, mitosis
  4. haploid, meiosis


Answer 2

Answer - (b) Haploid, Mitosis

Question 3: What is the chromosomal difference between a diploid zygote and a haploid cell?
  1. Number of copies of chromosome
  2. DNA and RNA
  3. Mitosis
  4. Meiosis


Answer 3

Answer - (a) Number of copies of chromosome

Question 4: Which cell division process reduces the number of chromosomes by half?
  1. DNA replication
  2. Mitosis
  3. Inheritance
  4. Meiosis


Answer 4

Answer - (d) Meiosis