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Elena L [17]
3 years ago
10

True or false, a combination is a substance formed when two or more different elements combine.

Biology
1 answer:
sashaice [31]3 years ago
7 0
I would say that that is true x
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2. A lac repressor turns off the expression of the lac genes by (1 point)
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<em>C. Binding to the operator.</em>

Explanation:

When the repressor starts binding to the operator, it can not transcribe, or make mRNA. This makes it so the RNA polymerase can't go onto the promoter and bind to it, which is a crucial part in making mRNA. The operator functions by making sure the certain DNA gets made, so it is very important. The lac repressor will turn off the expression of the lac genes by binding to the operator.

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Which of the following statements is true? (1 point)
MrMuchimi

Answer;

A. During active transport, a material may be moved from an area of low concentration to an area of high concentration.

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-Active transport involves movement of molecules or particles against a concentration gradient (from a region of low concentration to a region of high concentration). This movement of particles against the concentration gradient requires an input of energy from the cell in the form of ATP.

- Passive transport on the other hand involves movement of materials from a region of high concentration to a region of low concentration and does not utilize energy. Passive process are processes such as osmosis and diffusion.

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The flow of genetic information in eukaryotic organisms is DNA.

DNA replication processes link them.


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In which of these directions is the jet stream most likely to flow
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