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Novay_Z [31]
3 years ago
10

Select the true statements about SDS‑PAGE, a method of separating proteins. Assume that SDS‑PAGE is performed under reducing

conditions.
a. Proteins are separated in a polyacrylamide gel matrix.
b. Protein‑SDS complexes have similar mass to charge ratios; therefore, separation is by size.
c. Proteins are visualized using a dye that binds to the gel matrix, but not to proteins.
d. Smaller proteins migrate faster through the polyacrylamide gel.
e. Sodium dodecyl sulfate binds proteins, resulting in protein‑SDS complexes that are similar in size.
f. Protein‑SDS complexes migrate toward the negative electrode.
Chemistry
1 answer:
Tanzania [10]3 years ago
6 0
Proteins are separated
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2 years ago
Metals react by losing valence electrons. Which of the alkali metals loses its valence electrons most easily? Explain.
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3 0
3 years ago
Reasoning you used to decide if something was made of molecules.​
sasho [114]

Answer:

Whether something is a molecule or not depends on the type of bond that is formed when its atoms join together. In general, electrons can be shared between atoms (a molecular bond) or electrons can be completely removed from one atom and given to another (an ionic bond). Molecules have molecular bonds.

6 0
3 years ago
Compound a is an alkene that was treated with ozone (followed by dms) to yield only 4-heptanone. Draw the major product that is
olga nikolaevna [1]

Alkenes on reacting with ozone results in the formation of ozonide which undergo reductive  cleavage in presence of dimethyl sulfide to form carbonyl compounds (aldehyde or ketone). Whereas in presence of hydrogen peroxide it undergoes oxidative cleavage to form carboxylic acids or ketones.

Since, A alkene yields 4-heptanone only on treatment with ozone and DMS thus, it implies that both the chains on the side of the double-bond are similar the product is 4-heptanone that means the double bond is present between the chains at the 4th carbon. Therefore the structure of compound A is 4,5-dipropyloct-4-ene.

The reaction is as shown in the image.

The reaction of A with m-CPBA (meta-perchlorobenzoic acid) followed by aqueous acid H_3O^{+} is shown in the image.

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5 0
3 years ago
If the gram-formula mass of substance X is 180 g/mol, determine the molarity of the solution at Point E
Alina [70]
<h3><u>Answer;</u></h3>

<u>= 5 M or 5 moles/liter</u>

<h3><u>Explanation;</u></h3>

At point E, 90 g of substances X are dissolved in 100 g of the solvent.

100g of the solvent is equal to 100 ml

Molarity is the number of moles of a substance in one liter of a solvent.

90 g of X are in 100 ml

But; the RFM of X = 180 g/l

Therefore; the moles of X in 90 g = 90/180

                                                        = 0.5 moles

Therefore;

0.5 moles of X are contained in 100 ml of the solvent;

Thus, molarity = 0.5 × 1000/100

                       =<u> 5 M or 5 moles/liter</u>

7 0
3 years ago
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