Micro Biology week 1 Flashcards
What was Leeuwenhoek’s contribution to the science of microbiology?
He was the first to observe live microorganisms through a microscope.
How are the bacteria and the archaea different from all the other cellular microbes?
They have no nucleus.
A microorganism has the following characteristics: eukaryotic, multicellular, has cell walls, and grows in long filaments. What is its general classification?
fungus
You have isolated microorganisms that are green, photosynthetic, have a cell wall, and do NOT possess a nucleus. These organisms are __________.
bacteria
Which of the following is NOT an example of a fungus?
- mushrooms
- algae
- molds
- yeasts
algae
Which of the following is a true statement concerning bacteria and archaea?
- Bacteria reproduce asexually, while archaea reproduce sexually.
- While some bacteria are pathogenic to humans, no archaea are known to cause human diseases.
- Bacteria and archaea have identical types of cell walls.
- Bacteria are found only in extreme environments.
While some bacteria are pathogenic to humans, no archaea are known to cause human diseases.
All of the following individuals showed that cleanliness played a role in human disease EXCEPT __________.
- Lister
- Jenner
- Nightingale
- Semmelweis
Jenner
Koch’s work involving anthrax was significant because it was the first time __________.
a bacterium had been proven to cause a disease
Whose experiments supported the existence of a “life force”?
Needham
Put the following steps of Koch’s postulates in order:
a. The suspected infectious agent must be isolated and grown outside the host.
b. The suspected infectious agent causes the disease when it is introduced to a healthy, experimental host.
c. The suspected infectious agent must be found in every case of the disease.
d. The suspected infectious agent must be found in the diseased experimental host.
c, a, b, d
What is the vector for transmission of yellow fever?
Aedes aegypti mosquitoes
Why is this disease called “yellow fever”?
Patients have yellow mucous membranes and an elevated temperature.
Yellow fever is caused by a(n) _____.
virus
What is the best way to prevent the spread of yellow fever?
Drain standing water and sleep under mosquito netting.
Who is credited with the discovery of the cause of yellow fever?
Walter Reed
Which of the following is NOT a growing area of microbial study?
- ultraminiature technology
- communication within biofilms
- methods of disease
transmission - reducing antimicrobial resistance
methods of disease transmission
Which field of microbiology involves the study of microorganisms in their natural habitats?
environmental microbiology
Which of the following techniques could be used to produce a yeast capable of making viral proteins?
recombinant DNA technology
Which of the following fields of modern microbiology is NOT directly concerned with the genetic characteristics of a cell?
- bioremediation
- recombinant DNA technology
- molecular biology
- gene therapy
bioremediation
What is matter?
anything that takes up space and has mass
What is an atom?
the smallest chemical units of matter
What is an element?
composed of a single type of atom
Which of the following would contain teichoic acids?
a Gram-positive cell wall