Test on Bacterial Identification: Biochemical and Serological Tests

Question 1: Fermentation includes glycolysis and the recycling of NAD⁺.

A. Ano

B. Ne

Explanation: Fermentation is described as the extraction of energy from organic molecules without oxygen, which involves glycolysis plus the recycling of NAD⁺.

Question 2: According to the provided study materials, which of the following compounds can serve as an alternative final electron acceptor in the electron transport chain during anaerobic respiration?

A. Oxygen (O₂)

B. Nitrogen oxides (NOx)

C. Carbon dioxide (CO₂)

D. Sulfur oxides (SOx)

Explanation: Anaerobic respiration uses an alternative to O₂ as a final electron acceptor in the electron transport chain. The study materials specifically list NOx, SOx, and COx as examples of these alternative electron acceptors.

Question 3: A turbid appearance in sodium citrate broth indicates a negative result for citrate utilization.

A. Ano

B. Ne

Explanation: A turbid appearance in the sodium citrate broth indicates a positive result for citrate utilization, while a negative result is indicated by clear broth with no growth.

Question 4: The (S) component of the SIM reactions specifically tests for the production of which gaseous end product during anaerobic respiration?

A. Carbon dioxide

B. Ammonia

C. Indole

D. Hydrogen sulfide

Explanation: According to the 'Ex. 21. SIM Reactions' section, the 'S' stands for 'Production of Hydrogen Sulfide (Anaerobic Respiration)'. The enzyme pathway also indicates H₂S as a product from Cysteine.

Question 5: The 'stormy clot reaction' is a possible result observed when performing a Litmus milk test.

A. Ano

B. Ne

Explanation: The study materials explicitly state and show 'Litmus milk test with "stormy clot reaction"' as part of Ex. 17. Reactions in Litmus Milk, indicating it is an observed outcome of this test.