MICROBIOLOGY EXAM 1 LATEST ACTUAL EXAM WITH VERIFIED
QUESTIONS & CORRECT ANSWERS
Question 1.
Identify 3 components
of both gram positive
and negative bacteria.
Correct Answer: -Cell wall -Capsule -Plasma cell membrane
Question 2.
Compare/contrast
gram (+) and gram (-)
bacteria
Correct Answer: Gram (+) 1. thick peptidoglycan 2. small periplasmic space 3.
Teichoic acid
Gram (-) 1. THIN peptidoglycan 2. LPS 3. Porins 4. Large periplasmic space
Question 3.
Plasmids carry genes
for?
Correct Answer: 1. Antibiotic resistance 2. Resistance to heavy metals (Hg, Ag)
3. Resistance to UV light 4. Pili 5. Exotoxins
Question 4.
Bacterial shapes: cocci - diplococci (pair)
Correct Answer: - streptococci - tetrad (4) - staphylococci - Sarcina (cube of 8)
Question 5.
Bacterial shapes: Rods
(Bacilli)
Correct Answer: -chain of bacilli -flagellate rods -spore former
,Question 6.
Bacterial shapes: Spi-
rals
Correct Answer: -Vibrios -Spirilla -Spirochaetes
Question 7.
The shape of a bacteri-
um is determined by
its _____.
Correct Answer: rigid cell wall
Question 8.
Smallest and largest
bacteria
Correct Answer: Smallest: Mycoplasma
Largest: Bacillus anthracis
Question 9.
Bacteria is a prokary-
ote with the following
characteristics : ______
Correct Answer: -no nucleus or membrane-bound organelles -chromosomes and
plasmids freely float in cytoplasm
Question 10.
Function of cells wall
Correct Answer: • Provides structural support • Made of peptidoglycan
, (polysaccharide)
Question 11.
Function of capsule
Correct Answer: Sticky outer layer for protection and attachment
Question 12.
Function of plasma
cell membrane
Correct Answer: • Directs what enters and exits • Phospholipid bilayer
Question 13.
Differences in cell
walls gram (-) and (+)
Correct Answer:
Question 14.
Gram positive bacteria
structure
Correct Answer: • Inner plasma cell membrane (phospholipid bilayer) • Thick
'peptidoglycan' cell wall • Outer Capsule
Question 15.
Gram negative bacte-
ria structure
Correct Answer: • Inner plasma cell membrane (phospholipid bilayer) • Thin
'peptidoglycan' cell wall • Another outer plasma cell membrane (phospholipid
bilayer - 'lipopolysaccharides') • Outer Capsule
Question 16.
Bacteria unlike eu-
karyotes have no ____
in plasma membrane.
Correct Answer: sterols
QUESTIONS & CORRECT ANSWERS
Question 1.
Identify 3 components
of both gram positive
and negative bacteria.
Correct Answer: -Cell wall -Capsule -Plasma cell membrane
Question 2.
Compare/contrast
gram (+) and gram (-)
bacteria
Correct Answer: Gram (+) 1. thick peptidoglycan 2. small periplasmic space 3.
Teichoic acid
Gram (-) 1. THIN peptidoglycan 2. LPS 3. Porins 4. Large periplasmic space
Question 3.
Plasmids carry genes
for?
Correct Answer: 1. Antibiotic resistance 2. Resistance to heavy metals (Hg, Ag)
3. Resistance to UV light 4. Pili 5. Exotoxins
Question 4.
Bacterial shapes: cocci - diplococci (pair)
Correct Answer: - streptococci - tetrad (4) - staphylococci - Sarcina (cube of 8)
Question 5.
Bacterial shapes: Rods
(Bacilli)
Correct Answer: -chain of bacilli -flagellate rods -spore former
,Question 6.
Bacterial shapes: Spi-
rals
Correct Answer: -Vibrios -Spirilla -Spirochaetes
Question 7.
The shape of a bacteri-
um is determined by
its _____.
Correct Answer: rigid cell wall
Question 8.
Smallest and largest
bacteria
Correct Answer: Smallest: Mycoplasma
Largest: Bacillus anthracis
Question 9.
Bacteria is a prokary-
ote with the following
characteristics : ______
Correct Answer: -no nucleus or membrane-bound organelles -chromosomes and
plasmids freely float in cytoplasm
Question 10.
Function of cells wall
Correct Answer: • Provides structural support • Made of peptidoglycan
, (polysaccharide)
Question 11.
Function of capsule
Correct Answer: Sticky outer layer for protection and attachment
Question 12.
Function of plasma
cell membrane
Correct Answer: • Directs what enters and exits • Phospholipid bilayer
Question 13.
Differences in cell
walls gram (-) and (+)
Correct Answer:
Question 14.
Gram positive bacteria
structure
Correct Answer: • Inner plasma cell membrane (phospholipid bilayer) • Thick
'peptidoglycan' cell wall • Outer Capsule
Question 15.
Gram negative bacte-
ria structure
Correct Answer: • Inner plasma cell membrane (phospholipid bilayer) • Thin
'peptidoglycan' cell wall • Another outer plasma cell membrane (phospholipid
bilayer - 'lipopolysaccharides') • Outer Capsule
Question 16.
Bacteria unlike eu-
karyotes have no ____
in plasma membrane.
Correct Answer: sterols
