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DaniilM [7]
2 years ago
9

Can someone plz help me? :(

Biology
1 answer:
Brums [2.3K]2 years ago
7 0

I suggest that you should try C......

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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
500 points! and brainly for write answer
LenaWriter [7]
Plants make seeds that can grow into new plants, but if the seeds just fall to the ground under the parent plant, they might not get enough sun, water or nutrients from the soil. Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. The most common methods are wind, water, animals, explosion and fire.
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2 years ago
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Please label the cells I fell like I’m not right
Nikolay [14]

Answer:

Phospholipids    B

Transport Protein A

Explanation:

5 0
2 years ago
In a tabular form state four differences between plants and animals​
valentina_108 [34]

Answer:

plants.

1.cannot move from.

one place to another.

2.most are green.

3.sense organ absent

animals

1.can move from one place to another

2.have different colours

3.sense organ present

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3 years ago
What does the D in DNA Stand for?
REY [17]
The answer is C, the sugar, as the D stands for deoxyribose
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3 years ago
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