Micro Organisms
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Gram staining was introduced by_______________.
a.
Christian gram
b.
Alfred Gram
c.
Robertcook
d.
Louis Pasteur
Which
of the following is considered the most unifying concept in biology?
a.
Taxonomy
b.
Anatomy
c.
Genetics
d.
Evolution
Various
bacterial species can be subdivided into_______________.
a.
subspecies
b.
biovarieties
c.
serovarieties
d.
all of these
Mycoplasmas
are different from the other prokaryotes by_______________.
a.
presence of chitin in cell walls
b.
presence of murrain in cell walls
c.
presence of proteins in cell walls
d.
absence of cell wall itself
Evolutionary
relationships between groups of organisms are determined using which of the
following type of information?
a.
Comparisons of nucleotide sequences
b.
Comparisons of biochemical pathways
c.
Comparisons of structural features
d.
All of the above
Which
of the following is not true for eukaryotic cells?
a.
Nucleus is bounded by nuclear membrane
b.
Chromosomes contain histones
c.
Chloroplasts and mitochondria contains 70S ribosomes
d.
Gas vacuoles are present
Which
of the following is not true for prokaryotic organism?
a.
Nucleus is not bounded by nuclear membrane
b.
Chromosomes does not contain histones
c.
80S ribosomes are distributed in cytoplasm
d. Cell
wall contains peptidoglycan as one of the major component
The
phospholipids present in cytoplasm membrane of the archaeo-bacteria
is_______________.
a.
phosphoglycerides
b.
polyisoprenoid
c.
polyisoprenoid branched chain lipids
d. none
of the above
The
oldest eukaryotic organisms are considered to be_______________.
a.
diplomonads like Giardia
b.
archaea
c.
fungi
d.
animals
The
phospholipids present in cytoplasm membrane of eubacteria is
mainly_______________.
a.
phosphoglycerides
b.
polyisoprenoid
c.
phospholipoprotein
d. none
of these
Which
were the investigators lived at the same time?
a.
Koch and Pasteur
b. Darwin
and Woese
c. Van
Leeuenhoek and Ricketts
d. Berg
and Hooke
The
unifying feature of the archaea that distinguishes them from the bacteria
is_______________.
a.
habitats which are extreme environments with regard to acidity
b.
absence of a nuclear membrane temperature
c.
presence of a cell wall containing a characteristic outer membrane
d.
cytoplasmic ribosomes that are 70S
Living
organisms have many complex characteristics. Which one of the following is
shared by non-living matter as well?
a.
Homeostasis
b.
Tissues
c.
Reproduction
d.
Molecules
A
newly discovered microscopic structure is hypothesized to be a living organism.
Which of the following lines of evidence would support the contention that this
organism may be alive?
a. It
contains DNA
b. It
is made of a single cell
c.
It utilizes energy
d. All
of these
Mycoplasmas,
rickettsiae, and chlamydiae are_______________.
a.
types of fungi
b.
small bacteria
c.
species of protozoa
d.
forms of viruses
Which
of the following structure is absent in eukaryotic cells?
a.
Mitochondria
b.
Chloroplasts
c.
Golgi structure
d.
Mesosome
Who
was the inventor of the Petri dish?
a.
R.J. Petri, an assistant of R. Koch
b. A
famous French cook
c.
Italian glass blower from Petri, Italy
d. None
of the above
The
five-kingdom system of classification was set up by_______________.
a.
Louis Pasteur
b.
Robert Whittaker
c.
Robert Koch
d.
Masaki Ogata
The
membranes of which domains are chemically the most similar?
a.
Archaea and Bacteria
b.
Bacteria and Eukarya
c.
Eukarya and Archaea
d.
membranes of all three domains are chemically identical
Primary
differences between cilia and flagella are_______________.
a.
arrangement of microtubules
b. length
and location of basal bodies
c. how
the microtubules are fused to each other
d.
number, length and direction of force
All
membranes of free-living organisms have phospholipid bilayers, but exception
is_______________.
a.
bacteria
b.
fungi
c.
archaea