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Artemon [7]
3 years ago
7

You have conducted an Ames test on a given compound. Which of the following would be classified as a positive result on the Ames

test?
(A) His+ strain grows on an his- plate.
(B) His- strain grows on an his+ plate.
(C) His+ strain grows on either an his- or an his+ plate.
(D) His- strain grows on an his- plate.
(E) His+ strain grows on an his+ plate
Biology
2 answers:
Step2247 [10]3 years ago
8 0

Answer:

The correct answer is option (D) "His- strain grows on an his- plate".

Explanation:

The Ames test is a procedure that allows to detect if a given compound can cause mutations on a tested organism by growing strains of bacteria that require histidine (His-) to growth, since they are not able to produce its own histidine. In the Ames test, the bacteria is exposed to a given compound and is grown in a medium with small amount of histidine (his- plate). If the His- strain grows on a his- plate, it means that the bacteria has mutated to synthesize its own histidine and it is considered as a positive result on a the Ames test.

g100num [7]3 years ago
8 0

Answer:

(D) His- strain grows on an his- plate.

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