What is it called when light bends as it<br> moves from one substance to another?

When houses are being built or renovated the electrical must meet a certain code to ensure it is both safe and efficient. In one

dem82 [27]

The electricians should make sure:

the right tools are used and

overloading the outlet is avoided.

<h3>House wiring safety tips</h3>

The electrical system of a house is an important unit of the house that need to be maintained by an electrician to ensure the house is lit and safe.

In order to ensure safety in the house the electrician should ensure the following is carried out:

The right tools: The right tools will help protect both the electrician and his work. It will ensure that the house wiring is completed adequately.

Avoid overloading the outlet: Another basic house wiring rule is to not overload your outlets. If you overload outlets or your extension cords, it can lead to a fire hazard.

Therefore, The electricians should make sure the right tools are used and overloading the outlet is avoided.

Learn more electricity here:

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7 0

2 years ago

The lac operon in E. coli controls the gene expression of the enzymes that digest lactose in the cell. In the absence of lactose

erma4kov [3.2K]

Answer:

b, a, d, c, e

Explanation:

The lac operon is called lactose operon is a cluster of genes with a promoter. The bacteria uses lactose as the source of energy by the proteins coded by genes. This is present in prokaryotes.

The regulatory gene codes for repressor protein. The repressor binds to lactose and prevent its binding to operator. In the absence of lactose repressor gets activated and binds with operator. Thus, RNA polymerase is prevented from binding the promotor. The transcription of genes inhibited. Thus correct order is b, a, d, c, e.

5 0

3 years ago

I want answers please

olga nikolaevna [1]

Explanation:

1.arm&base

2.a shutter controlled by a lever

3.Nosepiece,objective lenses,stage clips

6. 100X.....(this means that the image being viewed will appear to be 100 times its actual size

6 0

3 years ago

Which TWO phrases describe the contents of a chromosome?

tigry1 [53]

Answer:

D&B

Explanation:

Each chromosome contains a single double-stranded piece of DNA

one chromosome contains thousands of genes

7 0

3 years ago

_____ act as signals or markers to help cells recognize one another.

Varvara68 [4.7K]

Explanation:

-<u>Carbohydrates </u>act as signals or markers to help cells recognize one another.

Carbohydrates are organic macromolecules with a range of functions within organisms. They may act as energy storage, structural support, and signal molecules. Together with transmembrane proteins embedded within the membrane from the extracellular fluid to the cytoplasm, they form glycoproteins (proteins attached to carbohydrates) which function as cell surface markers .

Further Explanation:

Carbon, is the backbone of all biological life on Earth. It contains 6 electrons, with 4 on its valence shell, and thus, readily forms covalent bonds with other elements. Covalent bonding involves the sharing of electrons; in nature, this occurs with hydrogen,oxygen, nitrogen, and phosphorus as highly flexible single bonds capable of rotation; rigid, non-rotating double; and very strong triple bonds. Carbon compounds form rings, and long branched chains- thus, carbon can form macromolecules in nature.

In nature, organic compounds may be large chains of monomers form biological macromolecules which carry out many essential functions in the body. These can include nucleic acids, carbohydrates, proteins and lipids. These are organic molecules, meaning they're ringed or long-chain Carbons bonded to the elements oxygen (O), hydrogen (H), nitrogen (N) and phosphorus (P); they are found in essential organic biomolecules include, proteins, nucleic acids, lipids and carbohydrates.

Carbohydrates function to supply energy and support molecules they consist of mainly sugars or starches in long chains and rings to form monosaccharide monomers. They include monosaccharides, disaccharides and polysaccharides which describes the type of bonding and the degree of complexity of the polymers. Basic makeup: C, H, O -with many polar OH groups

Learn more on proteins and carbohydrates at brainly.com/question/10744528

Learn more on membrane components at brainly.com/question/1971706

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3 0

4 years ago

What is it called when light bends as it moves from one substance to another?