Question:
Which one of the following is not a pigmented bacterium?
Which one of the following is not a pigmented bacterium?
Show Hint
Most lactic acid bacteria (such as Lactobacillus, Lactococcus, and Leuconostoc) form non-pigmented white or translucent colonies.
Updated On: Jul 10, 2026
- Halobacterium
- Flavobacterium
- Micrococcus
- Leuconostoc
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Many bacterial species produce characteristic intracellular or extracellular pigments, which can cause discoloration and cosmetic spoilage in foods.
Step 2: Detailed Explanation:
- Halobacterium produces carotenoid pigments, giving them a red-to-pink color.
- Flavobacterium produces yellow-to-orange lutein-like pigments.
- Micrococcus species often produce bright yellow (M. luteus) or rose-pink (M. roseus) pigments.
- Leuconostoc is a genus of lactic acid bacteria that produces colorless, greyish-white, or translucent colonies, meaning it is not a pigmented bacterium.
Step 3: Final Answer:
Therefore, Leuconostoc is not a pigmented bacterium.
Was this answer helpful?
0
0
Top ICAR AIEEA Food Science and Technology Questions
- What is the typical bond angle between hydrogen and oxygen atoms in a water molecule?
- Which conditions are favorable for the formation of acrylamide in foods?
Match List-I with List-II.
List-I (Chemical Compound) List-II (Source) (A) Inulin (I) Acacia tree (B) Sodium Alginate (II) Red algae (C) Gum arabica (III) Chicory root (D) Carrageenan (IV) Brown algae Choose the correct answer from the options given below.
- Arrange the following HACCP principles in the correct sequence as per their implementation:
(A). Conduct a hazard analysis
(B). Establish critical control points (CCPs)
(C). Establish corrective actions
(D). Establish monitoring procedures
(E). Establish verification procedures
(F). Establish record-keeping and documentation procedures
Choose the correct answer from the options given below: - Which of the following flavonoids is incorrectly grouped with its food source?
(A). Naringin-Citrus
(B). Quercetin-Onion
(C). Kaempferol-Broccoli
(D). Genistein-Berries
Choose the correct answer from the options given below:
View More Questions
Top ICAR AIEEA Food Safety Questions
- Arrange the following HACCP principles in the correct sequence as per their implementation:
(A). Conduct a hazard analysis
(B). Establish critical control points (CCPs)
(C). Establish corrective actions
(D). Establish monitoring procedures
(E). Establish verification procedures
(F). Establish record-keeping and documentation procedures
Choose the correct answer from the options given below: - HACCP principles were introduced by which of the following organizations?
- --------- is a spanish wine, matured at high temperature by placing the filled barrels for 3 to 4 months.
- The fermented fish product called Ngari is from _______
- Vibrio parahaemolyticus can grow in _______ NaCl.
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions