Micro Organisms
:: Home > Microbiology > Micro Organisms > Page 2
|
Genetic and biochemical similarities between contemporary cyanobacteria and eukaryotic chloroplasts are accepted to mean that_______________.
a.
eukaryotes evolved from bacteria
b.
eukaryotes evolved from archaea
c.
oxygenic photosynthesis first evolved in eukaryotes
d.
cyanobacteria arose from chloroplasts which escaped from plant cells
Which
of the following best represents the hierarchy of levels of biological
classification?
a.
Phylum, kingdom, class, order, genus, species, family
b.
Kingdom, phylum, class, order, family, genus, species
c.
Kingdom, phylum, family, class, order, genus, species
d.
Class, order, kingdom, phylum, family, genus, species
Which
one is not studied in microbiology?
a.
Bacteria
b.
Animal behaviour
c.
Fungi
d. Algae
A
characteristic of protein synthesis in both the archaea and eukarya
is_______________.
a.
transcription and translation are coupled
b.
translation is inhibited by diphtheria toxin
c.
proteins are synthesized from D-, rather than L-, isomers of amino acids
d. the
initiator tRNA is charged with N-formyl-methionine
Cell
theory includes all of the following except_______________.
a. all
organisms are composed of one or more cells
b.
the cell is the most primitive form of life
c. the
cell is the structural unit of life
d.
cells arise by division of preexisting cells
Micro
organisms are found in which of the following kingdom of five kingdom concept
(Whittaker's classification)?
a.
Monera
b.
Protista
c.
Fungi
d.
All of these
The
first organism in most natural food chains is_______________.
a. a
herbivore
b. a
decomposer
c.
photosynthetic
d.
carnivorous
The
third kingdom, protista, as suggested by E.H. Haeckel includes_______________.
a.
bacteria
b.
algae
c.
fungi
d.
all of these
Eukaryotic
cell organelles first emerged_______________.
a. from
a specialized lineage of cells within the kingdom Protista
b.
when prokaryotes engulfed each other and became interdependent
c. when
bacteria made their first attempts at reproduction
d. just
before the origin of the animal and fungal kingdoms
Who
discovered the bacteria that cause cholera?
a.
Pierre Berthelot
b.
Robert Koch
c.
Louis Pasteur
d.
Rudolf Virchow
The
three domain version of life on earth is based on the_______________.
a.
nucleic acid sequence data
b.
morphological traits
c.
metabolic traits
d.
characteristics of the cell wall
The
foundation for the germ theory of disease was set down by_______________.
a.
Robert Koch
b.
Ronald Ross
c.
Louis Pasteur
d.
Walter Reed
Most
microbial structures and enzymes are composed of_______________.
a.
lipids
b.
proteins
c.
carbohydrates
d.
lipids and carbohydrates
Which
of the following microorganisms is classified as a member of archaebacteria?
a.
Gyanobacteria
b.
Methanobacteria
c.
Trichomonads
d.
Mycoplasma
The
idea of selective toxicity was first proposed by_______________.
a.
Antony van Leeuwenhoek
b.
Paul Ehrlich
c.
Louis Pasteur
d.
Alexander Fleming
Which
of the following sequences has helped in identifying eukaryotes, eubacteria and
archeabacterial cell types?
a.
Signature sequence
b.
Signal sequence
c.
Shine-Dalgarno sequence
d.
Amino acid sequence
Archeal
cells usually do not contain peptidoglycan, rather contain pseudo-peptidoglycan
which is mainly composed of_______________.
a.
N-acetylmuramic acid and L-amino acids
b.
N-acetylmuramic acid and D-amino acids
c.
N-acetyltalosaminuronic acid and D-amino acids
d.
N-acetyltalosaminuronic acid and L-amino acids
In
the three domain system of classification, the traditional bacteria are placed
in the_______________.
a.
eukarya
b. archaea
c.
eubacteria
d. none
of these
One
of the reasons for the evolutionary success of the kingdom Monera is that its
members are nutritionally diverse. Which of the following(s) is/are the way(s)
of obtaining energy?
a.
Photoautotrophy
b.
Photoheterotrophy
c.
Chemoheterotrophy
d.
All of the above
The
individual best remembered for bringing microbes to the world
is_______________.
a.
Robert Hooke
b.
Antony Van Leeuenhoek
c.
Robert Koch
d.
Masaki Ogata
Prokaryotic
microorganism include_______________.
a.
protozoa
b.
fungi
c.
bacteria