Question Detail

MIC 121 MIC 121 Test compilation 1 Objective Question
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Question

What makes chocolate agar an enriched medium?
Options
A It contains a pH indicator to differentiate bacterial species
B It contains heat-treated blood, giving it a brown color
Correct Answer
C It has a high salt concentration
D It includes selective agents to inhibit unwanted bacteria
Correct Answer

Option B is the correct answer.

Detailed Explanation

Chocolate agar is an enriched medium because it contains heat-treated (lysed) blood. The heating process releases intracellular nutrients, such as hemin (X factor) and nicotinamide adenine dinucleotide (V factor), that are essential for the growth of fastidious bacteria. The heat treatment also denatures hemoglobin, giving the medium its characteristic brown color.

Hint

Think about the main component that is added to make it 'enriched' and its appearance.

Question Info

Course: MIC 121
Topic: MIC 121 Test compilation 1
Type: Objective
Difficulty: Not specified
Question 270 of 984
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