About Prokaryotes

Following are some of the multiple choice questions on the Prokaryotes with answers that will help the students in developing their knowledge.

Prokaryotes MCQ

1. Which of the following is NOT a characteristic of a Prokaryotic cell?

  • unicellular
  • floating DNA
  • very small
  • complex

2. Which statement best describes a prokaryote?

  • All single-celled organisms are prokaryotes.
  • Prokaryotes are single-celled organisms that lack a nucleus.
  • Prokaryotes are single-celled organisms that lack organelles.
  • all of the above

3. One example of a prokaryote is a...

  • fungus
  • bacteria
  • animal
  • plant

4. Bacteria and Archaea each have which of the following?

  • cell membrane
  • ribosomes
  • genetic material
  • all of the above

5. Which is the most diverse and abundant group of organisms on Earth?

  • Bacteria
  • Eukarya
  • Archaea
  • Prokaryotes

6. Why are cyanobacteria considered to be important?

  • Cyanobacteria are photosynthetic bacteria that contributed oxygen to early Earth.
  • Cyanobacteria were the first prokaryotes.
  • Ancient cyanobacteria probably evolved into the chloroplasts of animal cells.
  • all of the above

7. The most common prokaryotic shapes include

  • helices, circles, and rods.
  • helices, spheres, and rods.
  • double helices, spheres, and rods.
  • flagella, helices, spheres, and rods.

8. Reproduction in prokaryotes

  • occurs when a parent cell splits into two identical daughter cells
  • is called binary fission.
  • is a type of asexual reproduction.
  • all of the above

9. Most prokaryotes are chemoheterotrophs. This means

  • they get energy from chemical compounds and carbon from other living things.
  • they get energy from light and carbon from other living things.
  • they get energy from light and carbon from carbon dioxide.
  • they get energy from chemical compounds and carbon from carbon dioxide.

10. You have ten times as many ____________ as human cells in your body.

  • hair cells
  • blood cells
  • bacteria
  • white blood cells

11. Prokaryote habitats classified on the basis of or .

  • oxygen
  • temperature
  • Both of these

12. When do prokaryotes form spores

  • When they are under stress from UV radiation, high temperatures, or harsh chemicals
  • When they are hungry
  • When they need water
  • prokaryotes do not form spores

13. Most prokaryotes also have long, thin protein structures called______________ which help in movement.

  • cilia
  • biofilm
  • flagella
  • spores

14. A _______________ is a colony of prokaryotes that is stuck to a surface such as a rock or a host’s tissues.

  • cilia
  • biofilm
  • flagella
  • spores

15. The genetic material of prokaryotes is usually a double loop of DNA.

  • True
  • False

16. What are the two types of cells?

  • Prokaryotic & Eukaryotic
  • Bacteria & Eukaryotic
  • Eukaryotic
  • Animal & Plant

17. Which of the following is not under the Cell Theory?

  • Cells are the basic unit of life
  • All organisms are made up of cells
  • Cells came from other cells
  • A cell is an indestructible particle

18. ALL prokaryotes are unicellular, in nature.

  • TRUE
  • FALSE

19. Which is true of prokaryotic and eukaryotic cells?

  • Prokaryotic cells are larger than eukaryotic cells.
  • Eukaryotic cells do not have nuclei, and prokaryotic cells do have nuclei.
  • Prokaryotic cells lack membrane-bound organelles, and eukaryotic cells contain membrane-bound organelles.
  • Eukaryotic cells are simpler than prokaryotic cells.

20. Which does only eukaryotic cells contain?

  • nucleus
  • DNA
  • cell membrane
  • ribosomes

21. Which type of organism is an example of a prokaryotic organism?

  • the bacteria that cause Typhoid fever
  • the fungus that causes athlete's foot
  • the plant crabgrass that grows in lawns
  • the animal zebra mussel that is invasive to lakes

22. Which statement is not part of the cell theory?

  • All living organisms are composed of cells
  • non-living things can turn into living things
  • cells are the basic unit of life
  • cells come from pre-existing cells

23. Which statement is true about prokaryotes?

  • They contain a single circular DNA molecule as the genetic material.
  • They lack ribosomes.
  • They usually lack a cell wall.
  • They divide by mitosis.

24. Which definition of a relationship between bacteria and other organisms is NOT correct?

  • A parasitic bacterium is one that can cause disease in a plant or animal.
  • A symbiotic relationship is one in which the bacterium is usually free-living, but may become associated as a parasite in an animal under certain conditions.
  • A mutualistic relationship is one in which each of the associated organisms derives benefit.
  • A commensalistic bacterium lives on or in another organism without doing it any harm or any good, but the bacterium derives a benefit.

25. Prokaryotic cells are characterized by

  • the lack of an organized nucleus (true nucleus).
  • cells that can move by flagella.
  • the lack of membrane-bound organelles.
  • All of the choices are correct.

26. To be sure you have sterilized water, you must boil it for a long time in a pressure cooker because

  • some bacteria produce very resistant endospores.
  • bacteria are facultative anaerobes.
  • peptidoglycan is resistant to boiling water.
  • bacteria can otherwise regenerate living cells from nonliving.

27. Which cell organelle is correctly paired with its function?

  • vacuole - protein synthesis
  • mitochondrion - photosynthesis
  • chloroplast - cellular respiration
  • nucleus - directs cellular activities

28. When a cell in an organism divide and reproduce, the organism can grow. Which cell organelle contains the genetic material for reproduction?

  • the nucleus
  • the ribosome
  • the mitochondrion
  • the endoplasmic reticulum

29. Which cell part is usually the largest and most easily seen while observing cells under the microscope?

  • nucleus
  • mitochondrion
  • chloroplasts
  • ribosomes

30. Which is the correct order of the items below if placed from largest to smallest?

  • mitochondria, bacterial cell, animal cell
  • animal cell, bacterial cell, mitochondria
  • bacterial cell, mitochondria, animal cell
  • animal cell, mitochondria, bacterial cell

31. Which is a characteristic of prokaryotic cells?

  • Prokaryotic cells contain DNA enclosed with a nuclear membrane.
  • Prokaryotic cells are complex cells containing membrane bound organelles.
  • Prokaryotic cells are simple cells containing no membrane-bound organelles.
  • Prokaryotic cells synthesize proteins at ribosomes found on the endoplasmic reticulum.

32. Which protects most prokaryotic cells from the surrounding environment and provides structural support?

  • flagella
  • nucleus
  • cell membrane
  • ribosome

33. A biologist observed an organism found in a soil sample. Which would most likely lead biologists to conclude that the cell was prokaryotic?

  • It was large with a cell wall
  • It had a cell wall and a nucleus
  • It was very small with a nucleus
  • It had a flagella and lacked a nucleus

34. Which list correctly ranks structures by typical size, from largest to smallest?

  • eukaryotic cell, prokaryotic cell, virus, gene
  • eukaryotic cell, gene, virus, prokaryotic cell
  • prokaryotic cell, eukaryotic cell, virus, gene
  • virus, gene, prokaryotic cell, eukaryotic cell

35. Which contains a nucleus?

  • bacteria
  • eukaryotes
  • prokaryotes
  • viruses

36. What type of cell is a bacteria cell?

  • Animal Cell
  • Prokaryotic Cell
  • plant Cell
  • Eukaryotic cell

37. Which type of cell is an animal cells?

  • Prokaryotic Cells
  • Plant Cells
  • Bacteria Cells
  • Eukaryotic Cells

38. Which of the following is an example of the Prokaryotic Cell?

  • Bacteria Cell
  • Eukaryotic
  • Plant Cells
  • Animal Cells

39. What are the 2 main categories of cells?

  • Eukaryotic and Plants
  • Prokaryotic and Eukaryotic
  • Animal and Plants
  • Prokaryotic and Animal

40. A cell has a nucleus, is complex and large, and has membrane bound organelles. What type of cell is this?

  • there is not enough information
  • Prokaryotic
  • Eukaryotic
  • Bacteria

41. Are prokaryotes unicellular or multicellular

  • unicellular
  • multicellular

42. Which do BOTH prokaryotes and eukaryotes contain?

  • nucleus
  • mitochondria
  • ribosomes
  • cell wall

43. Prokaryotes do NOT have....

  • membrane bound organelles
  • DNA or RNA
  • Cell membrane
  • Life

44. Which type of cells has a chloroplast?

  • Prokaryote
  • Plant Cell
  • Animal Cell
  • Bacteria

45. What type of cell has a nucleus?

  • eukaryotic
  • prokaryotic
  • neither
  • both

46. Which is Smaller

  • Prokaryotic
  • Eukaryotic

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