BIOLOGY HIGH SCHOOL

Only the proteins that the bacteria Escherichia coli (E. coli) needs are synthesized at any given time. For example, when lactose is available in the environment, E. coli will express the lac genes that allow it to break down lactose to obtain energy. When lactose is not present, these genes are not expressed.This prevents the lac genes in the DNA of E. coli from being expressed most of the time.
A. the lac repressor
B. the lac operator
C. the lac promoter
D. the lac locator

Answers

Answer 1
Answer:

The correct answer is A. Lac repressor.

Lac repressor prevents lac gene which are found in the DNA of Escherichia Coli from being expressed for many times.

Lac repressor is termed as DNA which binds proteins. It allows the expression of genes from coding which are made for proteins to be involved in metabolism of lactose which is in bacteria.

When there is no lactose which is available in the cell, then the genes are being repressed. Lactose are being converted to allolactose if they are available.
Answer 2
Answer: The lac repressor prevents the lac genes in the DNA of E. coli from being expressed most of the time. The answer to your question is A. I hope this is the answer that you are looking for and it comes to your help.

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Answers

Answer:

gaa

Explanation:

apex

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Answers

A. The knowledge gained will lead to further experimentation that could potentially result in a new use for the drug.

Hope I Helped You!!!

Have A Good Day!!!

Answer:

A on edge

Explanation:

In human DNA, adenine (A) makes up approximately 30.9% of the bases, andguanine (G) makes up approximately 19.9% of the bases; therefore the percentage thymine (T) and cytosine (C) are
(A) 19.8% T and 19.8% C.
(B) 19.8% T and 29.4% C.
(C) 29.4% T and 19.8% C.
(D) 29.8% T and 29.8% C.
(E) 19.9% T and 30.9% C.
Can you please explain with some details?

Answers

In human DNA, there are nitrogenous base pairings- A, T C and G. A pairs with T and C pairs with G. Because they're a pair, the ratio of A:T and C:G should be as close to 1:1 as possible. Since A makes up approx 30.9%, T should be either C or D. As G makes up approx 19.9%, we can rule out option D, therefore the answer is C! Hope this helps (:

4. Answer the following questions in detail. Mention any four causes of deforestation. ​

Answers

Answer:

agricultural expansion,wood extraction,infrastructure expansion, climate change

The structures found in a living cell can be compared to the parts of a factory that produces cars. Which part of the factory is the most similar to the nucleus of a living cell?(1) A conveyor belt that transports materials
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Answers

The generator that produces energy for the factory. The nucleus serves as the core, the executive branch, and the brain of the cell. The correct option is D.

Thus, It regulates the cell's growth and reproduction and holds the genetic information. The genetic makeup of a cell is contained in the nucleus, which has been explained in detail as a membrane-bound structure.

In addition to serving as a DNA storage space, it also serves as the location of various significant cellular functions. In the nucleus, one's DNA can be duplicated first and foremost. DNA replication is the process that creates an exact duplicate of the DNA.

Cell division begins with the creation of two identical copies of the body or host, with each new cell receiving a unique set of instructions. Second, transcription takes place in the nucleus. Different RNA types are produced by transcription from DNA.

Thus, The generator that produces energy for the factory. The nucleus serves as the core, the executive branch, and the brain of the cell. The correct option is D.

Learn more about DNA, refer to the link:

brainly.com/question/30006059

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4. The nucleus is like the brain of the cell; the control center; the core.

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Answers

The correct answer for the question that is being presented above is this one: "a. New justices ruled consistently to separate church and state."  Reagan's election influence the judicial branch at the federal level by having new justices ruled consistently to separate church and state.
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