Micro 3050 – Clemson Actual Exam
Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!
1. Define chemotaxis - ANSWER movement toward a chemical attractant
or away from a chemical repellant
2. What does a chemoreceptor do? - ANSWER detect concentrations of
chemoattractant and chemorepellents
3. Where are most chemoreceptors located? - ANSWER near the flagella
4. Describe movements going towards an attractant - ANSWER longer
runs, less tumbles
5. Describe movements going towards a repellent - ANSWER shorter runs,
more tumbles
6. describe the biased random "walk" - ANSWER bacteria eventually gets
to their destination, tumbling causes it to head in a random direction
, 7. positive chemotaxis - ANSWER heading in a beneficial direction (toward
food or away from antibiotic)
8. negative chemotaxis - ANSWER going towards something bad for the
organism (away from food or toward antibiotic)
9. describe spirochete motility - ANSWER 1) Multiple flagella form axial
fibril which winds around the cell
2) Flagella remain in periplasmic space inside outer sheath
3) Corkscrew shape exhibits flexing and spinning movements (Good for
burrowing into tissues)
10.Describe Twitching motility - ANSWER 1) social
2) uses ATP
3) involved in slime layers
4) short jerky motions
5) type IV pili at ends of cells (grabs surface and pulls)
11.Describe Gliding Motility - ANSWER 1) smooth movements
2) helical track, gliding motors, extracellular adhesion proteins
3) USES PROTON MOTIVE FORCE (not ATP)
12.Requirements for microbial growth & survival - ANSWER 1) e- source
2) energy source
Questions With Reviewed 100%
Correct Detailed Answers
Guaranteed Pass!!
1. Define chemotaxis - ANSWER movement toward a chemical attractant
or away from a chemical repellant
2. What does a chemoreceptor do? - ANSWER detect concentrations of
chemoattractant and chemorepellents
3. Where are most chemoreceptors located? - ANSWER near the flagella
4. Describe movements going towards an attractant - ANSWER longer
runs, less tumbles
5. Describe movements going towards a repellent - ANSWER shorter runs,
more tumbles
6. describe the biased random "walk" - ANSWER bacteria eventually gets
to their destination, tumbling causes it to head in a random direction
, 7. positive chemotaxis - ANSWER heading in a beneficial direction (toward
food or away from antibiotic)
8. negative chemotaxis - ANSWER going towards something bad for the
organism (away from food or toward antibiotic)
9. describe spirochete motility - ANSWER 1) Multiple flagella form axial
fibril which winds around the cell
2) Flagella remain in periplasmic space inside outer sheath
3) Corkscrew shape exhibits flexing and spinning movements (Good for
burrowing into tissues)
10.Describe Twitching motility - ANSWER 1) social
2) uses ATP
3) involved in slime layers
4) short jerky motions
5) type IV pili at ends of cells (grabs surface and pulls)
11.Describe Gliding Motility - ANSWER 1) smooth movements
2) helical track, gliding motors, extracellular adhesion proteins
3) USES PROTON MOTIVE FORCE (not ATP)
12.Requirements for microbial growth & survival - ANSWER 1) e- source
2) energy source
