Medical Lab Studies

Bacterial Shape, Size & Structure Quiz

Q61. Function of teichoic acids?

 
 
 
 

Hint: They help in adherence and immune response.

Q62. Which cell wall lacks LPS?

 
 
 
 

Hint: Gram-positives lack LPS.

Q63. Mycoplasma has no:

 
 
 
 

Hint: It’s bounded only by membrane.

Q64. Mycoplasma membrane contains:

 
 
 
 

Hint: Uniquely among prokaryotes, they have sterols.

Q65. Site of oxidative phosphorylation in bacteria:

 
 
 
 

Hint: Membrane houses the transport chain.

Q66. Mesosome function:

 
 
 
 

Hint: Helps in cell division and DNA anchoring.

Q67. Ribosome size in bacteria:

 
 
 
 

Hint: Made of 30S and 50S subunits.

Q68. Antibiotics target bacterial ribosomes because:

 
 
 
 

Hint: They are structurally distinct from eukaryotic ones.

Q69. Corynebacterium diphtheriae has:

 
 
 
 

Hint: Metachromatic granules are diagnostic.

Q70. Plasmids are:

 
 
 
 

Hint: Extra-chromosomal replicating elements.

Answer Key
Q61: B) Attachment & shock induction         Q62: B) Gram positive         Q63: A) Cell wall         Q64: B) Sterols         Q65: D) Cytoplasmic membrane         Q66: B) Cell division & DNA anchoring         Q67: D) 70S         Q68: C) Structurally distinct (smaller)         Q69: A) Volutin (metachromatic) granules         Q70: C) Extrachromosomal circular DNA

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