TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
What is the main characteristic of a microbe? -
correct answer ✅B. it requires a microscope to be seen
Which of the following is an example of a contradiction to the
definition of a microbe as "microscopic" ? -
correct answer ✅B. Supersized microbial cells
Why are viruses considered a contradiction to the definition of a
microbe? -
correct answer ✅C. They lack independent reproduction and
metabolism
Which category of microbes lack a nucleus -
correct answer ✅A. prokaryotes
What distinguishes acellular microbes like viruses from prokaryotes
and eukaryotes? -
correct answer ✅B. They are not made of cells
What does an organism's genome consist of? -
correct answer ✅B. the total genetic information in chromosomal
DNA
,TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
What can studying a microbes genome reveal? -
correct answer ✅B. How the microbe grows, interacts with other
species, and evolve
What does a metagenome consist of? -
correct answer ✅B. A collection of genetic sequences from an
entire microbial community in an enviornment
Why is studying a metagenome important? -
correct answer ✅B. It provides insights into microbial diversity and
ecosystem functions.
Carolus Linnaeus (1707-1778) -
correct answer ✅called the microbial world "chaos"
What did Robert Hooke invent? -
correct answer ✅B. The compound microscope (30X)
Why did Robert Hooke coin the term "cells"? -
correct answer ✅B.The structures he observed in cork resembled
small rooms in a monastery
,TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
3. What was Robert Koch's major contribution to microbiology? -
correct answer ✅B) Developing the Four Postulates
What are the Four postulates -
correct answer ✅Robert Koch's postulates state that to prove a
specific microorganism causes a disease, it must:
1) be found in abundance in all diseased organisms but not healthy
ones
2) be isolated from a diseased organism and grown in pure culture
3) cause the disease when introduced into a healthy organism
4) be re-isolated from the newly infected organism and identified as
the same as the original microbe
Why is Antonie van Leeuwenhoek called the "Father of
Microbiology"? -
correct answer ✅B. He was the first to observe single-celled
organisms.
What was Antonie van Leeuwenhoek's key hobby that led to his
discoveries? -
correct answer ✅B. Building stronger and better lenses
, TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
1. Who is known as the "Father of Microbiology" for being the first
to observe microorganisms? -
correct answer ✅C) Antonie van Leeuwenhoek
The theory of spontaneous generation -
correct answer ✅The theory of spontaneous generation is a now-
disproven scientific idea that living organisms can arise from non-
living matter, essentially stating that life can spontaneously appear
from inanimate objects, like maggots appearing from decaying
meat
Which of the following correctly explains why the theory of
spontaneous generation was disproven? -
correct answer ✅C. Louis Pasteur's experiments demonstrated
that microorganisms only arise from existing microorganisms
2. Which scientist disproved the theory of spontaneous generation
through the swan-neck flask experiment? -
correct answer ✅C) Louis Pasteur
and Answers (Latest Update 2026)
What is the main characteristic of a microbe? -
correct answer ✅B. it requires a microscope to be seen
Which of the following is an example of a contradiction to the
definition of a microbe as "microscopic" ? -
correct answer ✅B. Supersized microbial cells
Why are viruses considered a contradiction to the definition of a
microbe? -
correct answer ✅C. They lack independent reproduction and
metabolism
Which category of microbes lack a nucleus -
correct answer ✅A. prokaryotes
What distinguishes acellular microbes like viruses from prokaryotes
and eukaryotes? -
correct answer ✅B. They are not made of cells
What does an organism's genome consist of? -
correct answer ✅B. the total genetic information in chromosomal
DNA
,TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
What can studying a microbes genome reveal? -
correct answer ✅B. How the microbe grows, interacts with other
species, and evolve
What does a metagenome consist of? -
correct answer ✅B. A collection of genetic sequences from an
entire microbial community in an enviornment
Why is studying a metagenome important? -
correct answer ✅B. It provides insights into microbial diversity and
ecosystem functions.
Carolus Linnaeus (1707-1778) -
correct answer ✅called the microbial world "chaos"
What did Robert Hooke invent? -
correct answer ✅B. The compound microscope (30X)
Why did Robert Hooke coin the term "cells"? -
correct answer ✅B.The structures he observed in cork resembled
small rooms in a monastery
,TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
3. What was Robert Koch's major contribution to microbiology? -
correct answer ✅B) Developing the Four Postulates
What are the Four postulates -
correct answer ✅Robert Koch's postulates state that to prove a
specific microorganism causes a disease, it must:
1) be found in abundance in all diseased organisms but not healthy
ones
2) be isolated from a diseased organism and grown in pure culture
3) cause the disease when introduced into a healthy organism
4) be re-isolated from the newly infected organism and identified as
the same as the original microbe
Why is Antonie van Leeuwenhoek called the "Father of
Microbiology"? -
correct answer ✅B. He was the first to observe single-celled
organisms.
What was Antonie van Leeuwenhoek's key hobby that led to his
discoveries? -
correct answer ✅B. Building stronger and better lenses
, TTU MBIO 3401 Final Exam Questions
and Answers (Latest Update 2026)
1. Who is known as the "Father of Microbiology" for being the first
to observe microorganisms? -
correct answer ✅C) Antonie van Leeuwenhoek
The theory of spontaneous generation -
correct answer ✅The theory of spontaneous generation is a now-
disproven scientific idea that living organisms can arise from non-
living matter, essentially stating that life can spontaneously appear
from inanimate objects, like maggots appearing from decaying
meat
Which of the following correctly explains why the theory of
spontaneous generation was disproven? -
correct answer ✅C. Louis Pasteur's experiments demonstrated
that microorganisms only arise from existing microorganisms
2. Which scientist disproved the theory of spontaneous generation
through the swan-neck flask experiment? -
correct answer ✅C) Louis Pasteur
