MICROBIOLOGY EXAM 1| QUESTIONS AND ANSWERS VERIFIED|
GUARANTEED PASS| ALEADY GRADED A+| LATEST EXAM
UPDATE
Identify 3 components of both gram positive and negative bacteria. -
CORRECT ANSWER-Cell wall
-Capsule
-Plasma cell membrane
Compare/contrast gram (+) and gram (-) bacteria -CORRECT ANSWERGram
(+)
1. thick peptidoglycan
2. small periplasmic space
3. Teichoic acid
Gram (-)
1. THIN peptidoglycan
2. LPS
3. Porins
4. Large periplasmic space
Plasmids carry genes for? -CORRECT ANSWER1. Antibiotic resistance
2. Resistance to heavy metals (Hg, Ag)
3. Resistance to UV light
4. Pili
5. Exotoxins
,Bacterial shapes: cocci -CORRECT ANSWER- diplococci (pair)
- streptococci
- tetrad (4)
- staphylococci
- Sarcina (cube of 8)
Bacterial shapes: Rods (Bacilli) -CORRECT ANSWER-chain of bacilli
-flagellate rods
-spore former
Bacterial shapes: Spirals -CORRECT ANSWER-Vibrios
-Spirilla
-Spirochaetes
The shape of a bacterium is determined by its _____. -CORRECT
ANSWERrigid cell wall
Smallest and largest bacteria -CORRECT ANSWERSmallest:
Mycoplasma
Largest: Bacillus anthracis
Bacteria is a prokaryote with the following characteristics : ______ -
CORRECT ANSWER-no nucleus or membrane-bound organelles
-chromosomes and plasmids freely float in cytoplasm
Function of cells wall -CORRECT ANSWER• Provides structural
, support
• Made of peptidoglycan
(polysaccharide)
Function of capsule -CORRECT ANSWERSticky outer layer
for protection and
attachment
Function of plasma cell membrane -CORRECT ANSWER• Directs what
enters
and exits
• Phospholipid bilayer
Differences in cell walls gram (-) and (+) -CORRECT ANSWER
Gram positive bacteria structure -CORRECT ANSWER• Inner plasma cell
membrane (phospholipid bilayer)
• Thick 'peptidoglycan' cell wall
• Outer Capsule
Gram negative bacteria structure -CORRECT ANSWER• Inner plasma cell
membrane
(phospholipid bilayer)
• Thin 'peptidoglycan' cell wall
• Another outer plasma cell
membrane (phospholipid
bilayer - 'lipopolysaccharides')
GUARANTEED PASS| ALEADY GRADED A+| LATEST EXAM
UPDATE
Identify 3 components of both gram positive and negative bacteria. -
CORRECT ANSWER-Cell wall
-Capsule
-Plasma cell membrane
Compare/contrast gram (+) and gram (-) bacteria -CORRECT ANSWERGram
(+)
1. thick peptidoglycan
2. small periplasmic space
3. Teichoic acid
Gram (-)
1. THIN peptidoglycan
2. LPS
3. Porins
4. Large periplasmic space
Plasmids carry genes for? -CORRECT ANSWER1. Antibiotic resistance
2. Resistance to heavy metals (Hg, Ag)
3. Resistance to UV light
4. Pili
5. Exotoxins
,Bacterial shapes: cocci -CORRECT ANSWER- diplococci (pair)
- streptococci
- tetrad (4)
- staphylococci
- Sarcina (cube of 8)
Bacterial shapes: Rods (Bacilli) -CORRECT ANSWER-chain of bacilli
-flagellate rods
-spore former
Bacterial shapes: Spirals -CORRECT ANSWER-Vibrios
-Spirilla
-Spirochaetes
The shape of a bacterium is determined by its _____. -CORRECT
ANSWERrigid cell wall
Smallest and largest bacteria -CORRECT ANSWERSmallest:
Mycoplasma
Largest: Bacillus anthracis
Bacteria is a prokaryote with the following characteristics : ______ -
CORRECT ANSWER-no nucleus or membrane-bound organelles
-chromosomes and plasmids freely float in cytoplasm
Function of cells wall -CORRECT ANSWER• Provides structural
, support
• Made of peptidoglycan
(polysaccharide)
Function of capsule -CORRECT ANSWERSticky outer layer
for protection and
attachment
Function of plasma cell membrane -CORRECT ANSWER• Directs what
enters
and exits
• Phospholipid bilayer
Differences in cell walls gram (-) and (+) -CORRECT ANSWER
Gram positive bacteria structure -CORRECT ANSWER• Inner plasma cell
membrane (phospholipid bilayer)
• Thick 'peptidoglycan' cell wall
• Outer Capsule
Gram negative bacteria structure -CORRECT ANSWER• Inner plasma cell
membrane
(phospholipid bilayer)
• Thin 'peptidoglycan' cell wall
• Another outer plasma cell
membrane (phospholipid
bilayer - 'lipopolysaccharides')
