#4Bacterial Physiology and Metabolism

True of Gram positive bacteria

• Thick cell wall

• Stain red with gram stain

• Thin cell wall

• Escherichia coli is an example

True of Gram negative bacteria

• Thin cell wall

• Stain blue with gram stain

• Thick cell wall

• Streptococcus pneumoniae is an example

Which is a gram resistant bacteria?

• Mycobacterium tuberculosis

• Staphylococcus aureus

• Pseudomonas aeruginosa

• Streptococcus pneumoniae

Which is not present among gram positive bacteria?

• Lipopolysaccharide

• Exotoxin

• Sporulation

• Peptidoglycan

Which is not present among gram negative bacteria?

• Teichoic acid

• Outer membrane

• Exotoxin

• Lipopolysaccharide

Which organism does not produce mycolic acid?

• Clostridium

• Mycobacterium

• Nocardia

• Corynebacterium

Which toxin is present only among gram negative bacteria?

• Endotoxin

• Exotoxin

• Anti-toxin

• Neurotoxin

Among the pneumonia -causing bacteria; which does not have virulence- promoting capsule?

• Mycoplasma pneumoniae

• Streptococcus pneumoniae

• Klebsiella pneumoniae

• Haemophilus influenzae type b

Most pathogenic bacteria grow optimally at these temperatures?

• 35-37 C

• 33-34 C

• 38-39 C

• 40-41 C

This renders some bacteria to withstand or survive drying, heat and chemicals.

• Spores

• Plasmids

• Flagellate

• Cell wall