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umka21 [38]
3 years ago
9

(1 point)

Biology
1 answer:
Yakvenalex [24]3 years ago
8 0

Answer:

The correct answer is Tryptophan binds with the repressor allowing it to attach to the operator site,blocking the RNA polymerase.

Explanation:

Tryptophan operon contain 3 regulatory genes and 5 structural genes.The structural genes encodes enzymes for tryptophan biosynthesis.

  The expression of tryptophan operon is tightly regulated by the the cellular level of amino acid tryptophan.

 When the tryptophan level is high at that time the tryptophan bind with the repressor protein encoded by regulatory tryp R gene and then the repressor tryptophan complex binds to the operator region thus preventing the RNA polymerase enzyme to exert its action.

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Answer: The invasive species unbalance an ecosystem because it takes over an ecosystem and does not let the other native species thrive while it takes over. There are many invasive species around the world even in your own town or state there is a type of fish suppose that is an invasive species to Michigan called a sea lamprey which kills fish native  to the great lakes and is taking over there are also zebra muscles if you need another example

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Answer:

The correct option is C - Professor Scrawll applied 100 nM BurD to the cells for 24 hours, while Dr. Bogey applied 1 nM BurD to the cells for 12 hours.

Explanation:

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Which of the following statements describes how the prokaryotic cell appear compared to the eukaryotic cells?
Gre4nikov [31]

Answer:

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Explanation:

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Which of the following characteristics would NOT increase or decrease the fitness of the organisms that possess it? a. Certain m
elena-14-01-66 [18.8K]

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