Bacteria Structure And Function

Question 1

How does bacteria reproduce ?

Answer 1

Binary fission

Question 2

Give two example of bacteria that can’t exist or grow independently?

Answer 2

Chlamydia and rickettsia

Question 3

3 basic component of a bacteria cell structure ?

Answer 3

surface appendages
surface layer
intracytoplasmic structures

Question 4

Name one example of bacteria with the 2 type of basic appendages ?

Answer 4

E. Coli

Question 5

3 major function of flagella ?

Answer 5

1. Migration to favorable growth environment
2. role in pathogenesis of UTIs by propelling the bacteria up the urethra into the bladder
3. identification in clinical laboratory

Question 6

What blocks the regeneration of flagella ?

Answer 6

Chloramphenicol

Question 7

—— are found on the tip of pili and are responsible for the attachment properties?

Answer 7

Adhesins

Question 8

Mention the types of motility and briefly explain ?

Answer 8

1. Run or swim: move in one direction for a length of time
2. Tumble : periodic,abrupt random change in direction
3. Swarming :rapid wavelike across a solid cultured medium

Question 9

Which of the pili is used for DNA transfer during conjugation ?

Answer 9

Sex pili

Question 10

Importance of cell wall in bacteria ?

Answer 10

1. Plays a role in cell division
2. Protect the protoplasm from external noxious stimuli
3. Gives structural support and maintain shape
4. Facilitate communication with the environment
5. Withstand and maintain osmotic pressure

Question 11

Different between gram positive and gram negative bacteria ?

Answer 11

1. Positive has thick layer,negative thin
2. Teichoic acid is present in positive
3. Priplasm is present in negative
4. Positive is sensitive to lysosome
5. Outer membrane is present in gram negative

Question 12

3 functions of cytoplasmic membrane?

Answer 12

1. Anchoring site for DNA
2. Site of electron transport and oxidative phosphorylation
3. Transport nutrient into and waste products out of the cell