WorksheetsUNIT 2
Total questions: 10
Worksheet time: 4mins
Which of the following is a characteristic of prokaryotic cells?
Presence of mitochondria
Absence of nuclear membrane
Presence of endoplasmic reticulum
Presence of nucleolus
What is the shape of Vibrio bacteria?
Spherical
Rod-shaped
Curved/comma-shaped
Spiral
The Gram staining technique was developed by:
Louis Pasteur
Robert Koch
Hans Gram
Anton van Leeuwenhoek
Why are gram-negative bacteria more resistant to antibiotics compared to gram-positive?
Thicker peptidoglycan layer
Presence of teichoic acid
Protective outer shell with endotoxin release
Absence of periplasmic space
Which of the following best differentiates eukaryotic from prokaryotic cells?
Larger size and presence of organelles
Ability to reproduce by binary fission
Possession of a single circular chromosome
Absence of sterols in cell membrane
Why is the bacterial cell wall important for survival?
Produces energy for the cell
Maintains osmotic balance and prevents lysis
Facilitates DNA replication
Assists in protein synthesis
A lab technician isolates a bacterium that is purple after Gram staining. This bacterium is most likely:
Gram-positive
Gram-negative
Acid-fast
Capsule-forming
Which of the following pairs is mismatched?
Cocci – spherical
Bacilli – rod-shaped
Spirochetes – rigid spiral
Spirilla – rigid spiral/helical
Which of the following arrangements correctly matches bacteria with their grouping?
Streptococci – clusters
Staphylococci – chains
Pneumococci – pairs
Bacillus anthrax – diplobacilli
A hospital patient on a ventilator develops a gram-negative infection. Which factor most likely contributed to this condition?
Overuse of antibiotics at home
Weak immune system due to hospital stay
Normal flora imbalance in the throat
Presence of teichoic acid in bacteria
