Question 1

Which of the following is a characteristic of Staphylococcus hominis?

Accepted Answer

Produces urease enzyme

Answer

Produces lactase enzyme

Answer

Produces catalase enzyme

Answer

Produces coagulase enzyme

Question 2

Which one is general characteristics of Clostridium botulinum?

Accepted Answer

All of the above

Question 3

Which of the following is a characteristic of Staphylococcus haemolyticus?

Accepted Answer

Produces gamma-hemolysis

Answer

Produces exfoliative toxin

Answer

Produces alpha-hemolysis

Answer

Produces coagulase enzyme

Question 4

Which of the following is a characteristic of Staphylococcus aureus?

Accepted Answer

Produces coagulase enzyme

Answer

Produces catalase enzyme

Answer

Produces urease enzyme

Answer

Produces lactase enzyme

Question 5

Following are characteristics of STREPTOCOCCI except?

Accepted Answer

They are found in hair-like projections of the streptococcal surface and determine virulence.

Answer

They are non-motile, non-sporulating, gram- positive facultative anaerobes.

Answer

They are aerobic bacteria in which growth is enhanced with 10% carbon dioxide.

Answer

They are heterogeneous group of bacteria, and no one system suffices to classify them.

Question 6

Which of the following is a characteristic of Methicillin-resistant Staphylococcus aureus (MRSA)?

Accepted Answer

Resistant to beta-lactam antibiotics

Answer

Produces exfoliative toxin

Answer

Produces biofilm

Answer

Produces coagulase enzyme

Question 7

There are more than 80 serotypes of the bacteria based on capsular typing.

Accepted Answer

true

Answer

false

Question 8

Which of the following is a characteristic of Staphylococcus saprophyticus?

Accepted Answer

Causes urinary tract infections.

Answer

Causes skin infections.

Answer

Causes pneumonia

Answer

Causes food poisoning

Question 9

Which one is the general characteristics of Clostridium difficile?

Accepted Answer

Not frequently found in the healthy adult but is found often in the hospital environment.

Answer

All the answers are correct.

Answer

Capsulated, non-motile, short gram-positive rods in which spores are hardly seen.

Answer

Human disease is caused by C. perfringens type A and C Pathogenicity determinant.

Question 10

Which of the following is a characteristic of Staphylococcus lugdunensis?

Accepted Answer

Produces delta-hemolysis.

Answer

Produces beta-lactamase enzyme.

Answer

Produces coagulase enzyme

Answer

Produces exfoliative toxin

Question 11

Which of the following is a characteristic of Staphylococcus epidermidis?

Accepted Answer

Produces biofilm

Answer

Produces exfoliative toxin

Answer

Produces coagulase enzyme

Answer

Produces beta-hemolysis

Question 12

Capsule: Polypeptide of D-glutamic acid: Enables the organism to evade phagocytosis

Accepted Answer

false

Answer

true

Question 13

................................is an active proteolytic enzyme which lyses fibrin by catalytic conversion of plasminogen to plasmin.

Accepted Answer

Streptokinase: Fibrinolysin.

Answer

Streptodornase: Streptococcal deoxyribonuclease

Answer

Erythrogenic toxin: Pyrogenic exotoxins

Answer

Hyaluronidase

Question 14

What causes secretory diarrhea due to release of enterotoxin in the intestine?

Accepted Answer

Clostridial food poisoning

Answer

Clostridial myonecrosis

Answer

Blood agar medium

Answer

Biochemical reaction

Question 15

What are characteristics of Clostridium perfringens?

Accepted Answer

there are five toxigenic groups\

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