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3 years ago

10

Someone please asnwer all four Thank You

1 answer:

Sedbober [7]3 years ago

7 0

<h3>1. Isopropanol is a rubbing alcohol antiseptic. No, it doesn't have any other names.</h3>

<h3>2. Precautions must be taken while using anything that is not simple..</h3>

Keep it away from fire as it contains alcohol
Do not swallow it
keep it away from your eyes

<h3>3. Colored pen dye have many colours like vibgyor i.e. red, orange, yellow, green, blue, indigo and purple.</h3>

<h3>4. Chromatography is a method of separating out materials from a mixture. Ink is a mixture of several dyes and therefore we can separate those colors from one another using chromatography. When ink is exposed to certain solvents the colors dissolve and can be seperated out. When we expose a piece of paper with ink on it to a solvent, the ink spreads across the paper when the ink dissolves.</h3>

<h3 />

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3 years ago

Alpha helices are a type of secondary structure in proteins. What is the length of a 27.0 kDa single‑stranded α‑helical protein

iogann1982 [59]

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First we have to calculate the amino acid residue.

$\text{Amino acid residue}=\frac{\text{Length of single strand of protein}}{\text{Mean residue mass}}$

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Length of single strand of protein = 27.0 kDa

Mean residue mass = 110 Da

$\text{Amino acid residue}=\frac{27.0kDa}{110Da}=\frac{27000Da}{110Da}=245.4$

Now we have to calculate the number of turns in protein.

$\text{Number of turns in protein}=\frac{\text{Amino acid residue}}{3.6\text{amino acid per turn of the alpha-helix}}$

As there are 3.6 amino acid per turn of the alpha-helix.

$\text{Number of turns in protein}=\frac{245.4}{3.6}=68.17$

Now we have to calculate the length of the protein.

$\text{Length of protein}=\text{Number of turns in protein}\times \text{Length of each turn}$

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3 years ago