EXAM 2026 FULL QUESTIONS AND
DETAILED SOLUTIONS
●● Streptococcus shape. Answer: Round bacteria arranged in chains.
●● Bacillus cereus shape. Answer: Rod-shaped bacteria.
●● Rhodospirillum shape. Answer: Spiral-shaped bacteria.
●● Main function of bacteria and fungi. Answer: Decompose dead
organisms and recycle nutrients.
●● Gram-positive bacteria. Answer: Thick cell wall; stains purple.
●● Gram-negative bacteria. Answer: Thin cell wall with outer
membrane; stains pink.
●● Why staining is used. Answer: Helps see bacteria and identify their
structure.
●● Photosynthetic vs chemosynthetic organisms. Answer: Some bacteria
use sunlight; others use chemicals for energy.