Media contain blood, hematin and DNA:
- A. Blood agar
- B. MaCconky
- C. Chocolate agar
- D. XLD.
Out of the four options, only chocolate agar contains blood, hematin, and DNA. So the answer is: C. Chocolate agar
Here's a brief explanation of each option:
- Blood agar:
This type of media contains whole blood, which provides nutrients for a wide variety of bacteria. However, it does not contain hematin or isolated DNA.
- MacConkey agar:
This media is used to differentiate between lactose-fermenting and lactose-non-fermenting bacteria. It does not contain blood, hematin, or DNA.
- Chocolate agar:
This media is made from blood agar that has been heated, which lyses (breaks open) the red blood cells and releases hematin. Hematin is a breakdown product of hemoglobin and provides a source of iron, which is essential for the growth of some bacteria. Chocolate agar also contains DNA from the lysed red blood cells.
- XLD agar:
This media is used to differentiate between lactose-fermenting and lactose-non-fermenting bacteria, as well as to identify Salmonella and Shigella species. It does not contain blood, hematin, or DNA.
