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Cell: The Unit of Life

Prokaryotic Cell Structure Practice Questions

20 free Prokaryotic Cell Structure practice questions for the NCERT Biology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Prokaryotic Cell Structure questions

20 questions
  1. Q1. Which of the following represents the smallest living cells that lack a cell wall and can survive without oxygen?
  2. Q2. The genomic DNA of a bacterium is typically a single chromosome that is circular. Many bacteria also have smaller circular DNA outside the genomic DNA called:
  3. Q3. What is the correct sequence of the layers of a typical bacterial cell envelope from outermost to innermost?
  4. Q4. A specialized differentiated form of cell membrane that is the characteristic of prokaryotes is the:
  5. Q5. In some bacteria, the glycocalyx is a loose sheath called the ______, while in others it is thick and tough called the ______.
  6. Q6. Bacterial flagellum is composed of three parts. Which of the following is the longest portion?
  7. Q7. Which surface structures of bacteria do not play a role in motility but help in attachment to rocks or host tissues?
  8. Q8. The ribosomes of prokaryotes are of the 70S type. What are the two subunits of these ribosomes?
  9. Q9. Several ribosomes may attach to a single mRNA and form a chain called:
  10. Q10. Reserve material in prokaryotic cells is stored in the cytoplasm in the form of:
  11. Q11. Gas vacuoles are found in which of the following organisms?
  12. Q12. Which structure in prokaryotes is functionally similar to the mitochondria of eukaryotes?
  13. Q13. Bacteria are classified into Gram-positive and Gram-negative based on:
  14. Q14. In cyanobacteria, there are other membranous extensions into the cytoplasm which contain pigments, called:
  15. Q15. The 'S' in 70S ribosome stands for:
  16. Q16. What is the primary function of the bacterial cell wall?
  17. Q17. Which of the following prokaryotic structures is used for 'mating' or exchange of genetic material?
  18. Q18. The plasma membrane of prokaryotes is:
  19. Q19. A comma-shaped bacterium is known as:
  20. Q20. Which of the following lacks a membrane-bound nucleus and organelles?