Suppose That a Certain Wild-Type Bacteria Can Synthesize Substance D

question 219

Multiple Choice

Suppose that a certain wild-type bacteria can synthesize substance D, but various mutant strains cannot.We know that substance D is synthesized from substance X in a pathway that involves three intermediate substances (A, B, and C) , but we do not know the order of the steps in the pathway.The table shows four different mutant strains that have been tested for their ability to grow on the various substances.The "+" means that the strain can grow on that substance.The "‒" means that the strain cannot grow on that substance. What is the most likely order of the pathway? (For example, A  B  C  D indicates that substance A is converted to substance B, which is converted to substance C, which is converted to substance D.)

• A) A  B  C  D
• B) A  C  B  D
• C) B  A  C  D
• D) C  B  A  D
• E) C  A  B  D

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Definitions:

Value Chain

A series of activities that a company performs to create value for its customers, from product design to post-sale service.

Location Economies

The cost advantages gained by a business due to its geographical position, often influencing its competitiveness.

Meganational Strategy

A business strategy that emphasizes operating and competing in multiple countries as one global market.

Avoids Adaptation

a strategy where a business does not significantly alter its product or services to accommodate different cultural or market requirements in its expansion or operations.