microbiology quiz/homework
questions and answers chapter 1-
16
How many times more bacteria cells than your own cells do you have in you and on you? *
1 time
10 times
100 times
10 times less - Ans>>10 times
Microorganisms are involved in *
causing disease.
curing/treating disease.
preparing food.
cleaning up pollutants.
All of the choices are correct. - Ans>>
Microorganisms are involved in *
causing disease.
curing/treating disease.
preparing food.
cleaning up pollutants.
All of the choices are correct. - Ans>>All of the choices are correct.
Bacteria *
are not found on our bodies.
are only found on small select parts of our bodies.
provide protection to us from disease by covering our bodies, crowding out 'bad' invading bacteria.
always cause disease when growing on our bodies. - Ans>>provide protection to us from disease by covering our
bodies, crowding out 'bad' invading bacteria.
Which is usually true of Archaea? *
They are found as rods, spheres, or spirals.
They reproduce by binary fission.
,They contain rigid cell walls.
They are found as single cells.
All of the choices are correct. - Ans>>All of the choices are correct.
The cell types which lack a membrane bound nucleus are found in the *
eukaryotes.
prokaryotes
archaea.
protista.
prokaryotes AND archaea. - Ans>>prokaryotes
Which group(s) below contain single-celled and multicellular organisms? *
algae
fungi
protozoa
All of the choices are correct.
algae AND fungi - Ans>>algae AND fungi
** protozoa can only be single-celled
Viruses may only be grown *
in sterile, cell-free chemical growth media.
in living cells.
at body temperature.
in darkness. - Ans>>in living cells.
pH *
is a measure of the hydrogen ion concentration.
utilizes a scale from 5 to 8.
is a linear (not logarithmic) scale.
is an abbreviation for, "power of helium".
is a measure of the hydrogen ion concentration, utilizes a scale from 5 to 8 AND is a linear (not logarithmic) scale -
Ans>>is a measure of the hydrogen ion concentration.
The subunits (building blocks) of proteins are *
nucleotides
phospholipids.
, amino acids.
carbohydrates. - Ans>>amino acids.
The typical size of a bacterium is *
1 nm
10 nm
1000 nm
1 km - Ans>>1000 nm
Which of the following is found in RNA but not in DNA? *
adenine
ribose
thymine
uracil
ribose AND uracil - Ans>>ribose AND uracil
What is the number of particles that were in Caesar's lungs when he died that you inhale in each of your breath? *
3
30
3.10^9
6.10^9 - Ans>>30
Which is true of simple diffusion of water? *
Water usually enters a cell and produces a tremendous osmotic pressure.
Water usually leaves the cell and produces negative osmotic pressure
Water tends to enter and leave the cell equally, resulting in no pressure in the cell.
The diffusion ultimately relies on the selectively permeable nature of the cell membrane.
Water usually enters a cell and produces a tremendous osmotic pressure AND the diffusion ultimately relies on the
selectively permeable nature of the cell membrane. - Ans>>Water tends to enter and leave the cell equally, resulting
in no pressure in the cell.
Individual atoms on the surface of prepared samples can be observed by using the
questions and answers chapter 1-
16
How many times more bacteria cells than your own cells do you have in you and on you? *
1 time
10 times
100 times
10 times less - Ans>>10 times
Microorganisms are involved in *
causing disease.
curing/treating disease.
preparing food.
cleaning up pollutants.
All of the choices are correct. - Ans>>
Microorganisms are involved in *
causing disease.
curing/treating disease.
preparing food.
cleaning up pollutants.
All of the choices are correct. - Ans>>All of the choices are correct.
Bacteria *
are not found on our bodies.
are only found on small select parts of our bodies.
provide protection to us from disease by covering our bodies, crowding out 'bad' invading bacteria.
always cause disease when growing on our bodies. - Ans>>provide protection to us from disease by covering our
bodies, crowding out 'bad' invading bacteria.
Which is usually true of Archaea? *
They are found as rods, spheres, or spirals.
They reproduce by binary fission.
,They contain rigid cell walls.
They are found as single cells.
All of the choices are correct. - Ans>>All of the choices are correct.
The cell types which lack a membrane bound nucleus are found in the *
eukaryotes.
prokaryotes
archaea.
protista.
prokaryotes AND archaea. - Ans>>prokaryotes
Which group(s) below contain single-celled and multicellular organisms? *
algae
fungi
protozoa
All of the choices are correct.
algae AND fungi - Ans>>algae AND fungi
** protozoa can only be single-celled
Viruses may only be grown *
in sterile, cell-free chemical growth media.
in living cells.
at body temperature.
in darkness. - Ans>>in living cells.
pH *
is a measure of the hydrogen ion concentration.
utilizes a scale from 5 to 8.
is a linear (not logarithmic) scale.
is an abbreviation for, "power of helium".
is a measure of the hydrogen ion concentration, utilizes a scale from 5 to 8 AND is a linear (not logarithmic) scale -
Ans>>is a measure of the hydrogen ion concentration.
The subunits (building blocks) of proteins are *
nucleotides
phospholipids.
, amino acids.
carbohydrates. - Ans>>amino acids.
The typical size of a bacterium is *
1 nm
10 nm
1000 nm
1 km - Ans>>1000 nm
Which of the following is found in RNA but not in DNA? *
adenine
ribose
thymine
uracil
ribose AND uracil - Ans>>ribose AND uracil
What is the number of particles that were in Caesar's lungs when he died that you inhale in each of your breath? *
3
30
3.10^9
6.10^9 - Ans>>30
Which is true of simple diffusion of water? *
Water usually enters a cell and produces a tremendous osmotic pressure.
Water usually leaves the cell and produces negative osmotic pressure
Water tends to enter and leave the cell equally, resulting in no pressure in the cell.
The diffusion ultimately relies on the selectively permeable nature of the cell membrane.
Water usually enters a cell and produces a tremendous osmotic pressure AND the diffusion ultimately relies on the
selectively permeable nature of the cell membrane. - Ans>>Water tends to enter and leave the cell equally, resulting
in no pressure in the cell.
Individual atoms on the surface of prepared samples can be observed by using the
