Download Microbiology Homework # 1 Prof. Santos 1

Microbiology
Homework # 1
Prof. Santos
1-Which is usually true of Bacteria?
A. They are found as rods, spheres, or spirals.
B. They reproduce by binary fission.
C. They contain rigid cell walls made of peptidoglycan.
D. They are found as single cells.
E. All of the choices are correct.
2-Which is usually true of Archaea?
A. They are found in extreme environments.
B. They reproduce by mitosis.
C. They contain rigid cell walls composed of peptidoglycan.
D- Are both unicellular and multicellular
3-The cell types which lack a membrane bound nucleus are found in the
A. eukaryotes.
B. prokaryotes.
C. archaea.
D. protista.
E. prokaryotes AND archaea.
4- Eucarya
A. consist of only multicellular organisms.
B. have a more complex internal structure than Archaea or Bacteria.
C. have a simpler internal structure than Archaea or Bacteria.
D. have a membrane around the DNA.
E. have a more complex internal structure than Archaea or Bacteria AND have a membrane
around the DNA.
5- Which scientist is correctly matched with his contribution to Microbiology?
a- Leeuwenhoek- microscopy
b- Hooke- disproved theory of SG
c- Redi- swan neck experiment
d- Pasteur- aseptic techniques
e- All are correct
6- Which is the correct order of classification from largest to smallest?
a- Kingdom- phylum-class- order- family- genus- species
b- Species- genus- family- order- class- phylum- kingdom
c- Order- family- species- genus- kingdom- phylum- class
d- Kingdom- phylum- order- class family- genus- species
7- Which contains a cell wall composed of cellulose?
a- Bacteria
b- Algae
c- Protozoa
d- Virus
e- All of the above
8- A microbiologist that is mostly concerned with the study of Bacteria is referred to as a
a- Virologist
b- biochemist
c- Mycologist
d- Bacteriologist
e- None of the above
9- Two general categories that all cells fall under are
a- Unicellular and multicellular
b- Eukaryote and prokaryote
c- Gram positive and gram negative
d- Cocci and bacilli
10- The area in a prokaryote cell where the genetic material is found is called the
a- Nucleus
b- Mitochondria
c- Nucleoid
d- Cytoplasmic disk
e- All of the above
11- An organism recently isolated on a hot spring near Yosemite National Park is a single
celled organism, appears to divide by binary fission, and biochemical analysis reveals the
presence of ether lipids on its membrane. In what domain would you place this recently
discovered organism?
a- Eukaryota
b- Bacteria
c- Archaea
d- None of the above
12- A short piece of RNA that causes disease in plants is known as a
a- Virus
b- Bacteria
c- Viroid
d- Euglena
13- Arthropods are multicellular organisms that mostly act as both biological and
mechanical
a- Genetic material
b- Vectors
c- Host
d- None of the above
14- A naked virus consists of
a- Protein capsid and genetic material
b- Both DNA and RNA
c- An envelope, DNA and RNA
d- None of the above
15- A cell was analyzed and determined to have a total of 300 mitochondria and ribosomes
embedded on the endoplasmic reticulum. This cell cannot be a
a- Sperm cell
b- Kidney cell
c- Bacteria
d- Red blood cell
16- Bacteria that are normally found in your gastro-intestinal tract that play a key role in
metabolism and boosting your Immune system are part of your
a- Normal flora
b- Food chain
c- Pathogenic bacteria
d- Infection
17- What are some practical applications or uses of microorganisms?