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Vesnalui [34]
2 years ago
5

Which of the following statements best defines the term operon?

Biology
1 answer:
Mandarinka [93]2 years ago
5 0

Answer:

b. An operon is a region of DNA that codes for a series of functionally related genes under the control of the same promoter

Explanation:

An operon is usually found in prokaryotic organisms. It refers to the functional structure within prokaryotic genome in which multiple different genes are under the control of one promotor. All of the genes are transcribed together which leads to the formation of polycistronic mRNA. Polycistronic mRNA migh undergo splicing to create monocistronic mRNAs which will be translated separately into few products (proteins).

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Answer:

the answer should be ( 50% pink and 50% orange )

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3 0
3 years ago
Which type of tissue performs the role of signal conduction in the body? A. Connective tissue B. Epithelial tissue C. Muscle tis
Lyrx [107]
The answer is d., nervous tissue that promotes movement in the muscle tissue, triggers the brain on what muscle tissue needs to move, as in walking or lifting weights...

6 0
2 years ago
Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. mc012-1.jpg Which process help
DIA [1.3K]
Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The process which helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II, is crossing over (C). Crossing over is the exchange of genetic material between two homogenous chromosomes. It is one of the final phases of prophase I. This process is called synapsis. It occurs when the matching regions on the matching chromosomes break and then reconnect to the other chromosome
7 0
3 years ago
Read 2 more answers
You are doing an experiment and plated E. coliin different medias. Media A has onlyglucose, B has only lactose, and media C has
krek1111 [17]

Answer:

A. Glucose:

As lactose is absent will follow the glucose metabolism, so the lac repressor will hold tightly with the operator which leads to the prevention of transcription as RNA polymerase can not bind to promoter so no lactose metabolism.

B. lactose:

In the case or wild mutant lactose metabolism will occur as lactose is present, allolactose binds to the lac repressor thus the operator and promoter are free so transcription starts.  The same result will be in all test except in the case of a mutant repressor.

C. glucose and lactose:

In this case, diauxic growth will occur. This growth takes place when two sugars are present in the media. The preferred sugar will be consumed first That is glucose. Then a lag phase will come which will be followed by the second sugar metabolism that is lactose.  the given two cases :

Lactose will be metabolized first, as operator site mutation prevents repressor protein binding and thus will lead to the constitutive synthesis of lac operon in test B.   The same thing will happen, as in this case also, constitutive synthesis of lac operon will happen in test C.

Cultures grown in the presence of both glucose and lactose are metabolizing lactose. In the test (b) and (c) will be responsible due to constitutive synthesis of lac operon will happen.

6 0
3 years ago
By controlling the spread of vegetation and the balance of certain fish species, the American alligator serves as a(n) in its ec
seraphim [82]

Answer: Below

Explanation:

Alligators play an important role in maintaining ecosystem balance. Sitting at the top of the food chain, alligators are top predators and help keep other animal populations in balance. By digging holes and leaving trails throughout marshes, they create habitats for fish and marine invertebrates

3 0
2 years ago
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