MICRO LAB 1 QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS (GRADED A+)
True or False: A student observes several cells with distinct nuclei in a pond
water sample under high-power magnification. The student can correctly conclude
that these cells are NOT bacteria.
✔✔ True
(Bacteria are prokaryotes and lack membrane-bound organelle structures,
including a true nucleus. Organisms containing nuclei are eukaryotes).
Which historical scientist is credited with first observing cells?
✔✔ Robert Hooke
(Observed cork structures under a compound microscope in 1665 and coined the
term "cell").
If you were setting up an experiment to disprove spontaneous generation in a
liquid medium, which factor would be essential to the experimental setup?
✔✔ Using a sterile liquid medium and eliminating exposure to airborne
microorganisms
(As demonstrated by Louis Pasteur's swan-neck flask experiment, destroying pre-
existing organisms via heat sterilization and preventing external microbes from
entering prevents microbial growth).
The arguments supporting spontaneous generation were finally disproved by -
ANSWER✔✔Louis Pasteur.
Proof that a microbe could cause disease was provided by -ANSWER✔✔Koch
Penicillin was discovered by accident by -ANSWER✔✔Alexander Fleming
ANSWERS WITH COMPLETE
SOLUTIONS (GRADED A+)
True or False: A student observes several cells with distinct nuclei in a pond
water sample under high-power magnification. The student can correctly conclude
that these cells are NOT bacteria.
✔✔ True
(Bacteria are prokaryotes and lack membrane-bound organelle structures,
including a true nucleus. Organisms containing nuclei are eukaryotes).
Which historical scientist is credited with first observing cells?
✔✔ Robert Hooke
(Observed cork structures under a compound microscope in 1665 and coined the
term "cell").
If you were setting up an experiment to disprove spontaneous generation in a
liquid medium, which factor would be essential to the experimental setup?
✔✔ Using a sterile liquid medium and eliminating exposure to airborne
microorganisms
(As demonstrated by Louis Pasteur's swan-neck flask experiment, destroying pre-
existing organisms via heat sterilization and preventing external microbes from
entering prevents microbial growth).
The arguments supporting spontaneous generation were finally disproved by -
ANSWER✔✔Louis Pasteur.
Proof that a microbe could cause disease was provided by -ANSWER✔✔Koch
Penicillin was discovered by accident by -ANSWER✔✔Alexander Fleming
