L3: Bacterial morphology

Question 1

what is the function of cytoplasmic membrane ?

Answer 1

seperates cell wall from cytoplasm

Question 2

what is the outer-most layer of cell wall composed of?

Answer 2

polysaccharieds (peptidoglycan and mucopeptide) formed by NAG and NAM HELD BY PEPTIDE CHAINS

Question 3

Describe the structure of a gram positive bacterial cell wall.

Answer 3

one Layer of cell wall

contains teichoic acid an lipotechoic acid
multilayered peptidoglycan sheath

Question 4

describe the structure of a gram negative bacterial cell wall.

Answer 4

cell wall is 2 layers

outer membrane linked to single layer of peptidoglycan by lipoprotiens

has porins on outer membrane

has lipopolysaccharide(endotoxins)

Question 5

what special feature is present in the outer membrane of gram negative bacterial cell walls that is not present in gram positive ones ?

Answer 5

the presence of porins

Question 6

what component is responsible for the toxic nature of lipopolysaccahrides ?

Answer 6

phospholipid A

Question 7

what are acid fast organisms ? give an example

Answer 7

organisms that cannot be stained due to the presence of mycolic acid
ex:mycobacterium TB

Question 8

what part of the bacteria is responsible for the secretion of toxins ?

Answer 8

cytoplasmic membrane

Question 9

what are mesosomes?

Answer 9

invagination of plasma membrane where respiratory enzymes are found and they also coordinate nuclear and cytoplasmic division during binary fission

Question 10

do bacteria have haploid or diploid genes?

Answer 10

haploid

Question 11

what part of bacterial DNA is responsible for drug resistance ?

Answer 11

plasmids

Question 12

what component is known as the slime layer and is important for adhesion ?

Answer 12

glycocolyx (especially in case of streptococcus mutans

Question 13

.spores contain a high concentration of___

Answer 13

calcium dip

Question 13

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