Question

The Bdellovibrios bacteria is a _________ bacteria:
A. Gram negative
B. Predator of gram negative bacteria
C. It has a single polar flagellum
D. Reproduce by producing spores called myxospore during nutrient deficit conditions
Choose the correct answer from the options given below:

• A. A, B and D only
• B. A, B and C only
• C. A, B, C and D
• D. B, C and D only

Hint:

Associate Bdellovibrio with "predator." It's a Gram-negative predator of other Gram-negative bacteria. Its predatory lifestyle requires it to be fast, hence the powerful single polar flagellum. Don't confuse its complex life cycle with spore formation in other bacteria like Myxobacteria or Bacillus.

Answer 1

The Correct Option is B

Step 1: Concept Overview:
Bdellovibrio is a bacterial genus notable for its predatory behavior. This question requires identifying the accurate characteristics of Bdellovibrio from the provided options.
Step 2: Detailed Analysis:
Evaluating each statement:


A. Gram negative: Correct. Bdellovibrio is indeed Gram-negative.

B. Predator of gram negative bacteria: Correct. This is a key characteristic. Bdellovibrio actively hunts other Gram-negative bacteria, invading their periplasm and consuming their contents.

C. It has a single polar flagellum: Correct. The motile "attack phase" of Bdellovibrio utilizes a single, thick, sheathed polar flagellum.

D. Reproduce by producing spores called myxospore during nutrient deficit conditions: Incorrect. Myxospores are produced by Myxobacteria. Bdellovibrio reproduces by growing into a filament within its host, then dividing into multiple progeny cells before lysing the host. It does not form myxospores.

Step 3: Conclusion:
Statements A, B, and C are correct. Statement D is incorrect. Therefore, the correct answer is (B).