Module 2 : CHROMOSOME STRUCTURE AND ORGANISATION

Lecture 3 : 1,2 and 3 Questions

Questions:
1. The products of mitosis are _______________.

  1. one nucleus containing twice as much DNA as the parent nucleus
  2. four genetically identical nuclei
  3. four nuclei containing half as much DNA as the parent nucleus
  4. two genetically identical nuclei
  5. two genetically identical cells

2. Genetically diverse offspring result from __________.

  1. binary fission
  2. mitosis
  3. sexual reproduction
  4. cytokinesis
  5. cloning

3. How many chromosomes do humans have in their body cells?

  1. 48
  2. 46
  3. 50

4. Which answer is in order from SMALLEST to BIGGEST?

  1. gene, chromosome, cell
  2. chromosome, gene, cell
  3. nucleus, gene, chromosome

5. Sizes of genomes of free-living organisms have been found to range from approximately

  1. 2-200 Mbp
  2. 0.5-1,000 Mbp
  3. 100-2,000,000 Mbp
  4. 1,000-1,000,000,000 Mbp
  5. 0.5-200,000 Mbp
    [1 Mbp = 1 million bp]

6. Most sequences in the human genome belong to

  1. Genes
  2. Pseudogenes
  3. Gene fragments
  4. Interspersed repeats
  5. Tandem repeats

7. Which of the following genomes is richest in interspersed repeat sequences?

  1. Drosophila genome
  2. Human genome
  3. Maize genome
  4. Saccharomyces genome
  5. E. coli genome

8. A nucleosome consists of

  1. Chromatin and nucleotides
  2. Chromatin and histones
  3. DNA and chromatin
  4. DNA and histones
  5. Nucleoids and histone

9. Centromers contain

  1. Repeated DNA
  2. Chromatids
  3. Telomeres
  4. Proteins
  5. Microtubules
  6. Genes

10. Gene density can be high

  1. in telomeres
  2. anywhere on the chromosomes
  3. in centromeres
  4. in metaphase chromosomes
  5. in anaphase chromosomes