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3 years ago

What is different about the secondary, tertiary, and quaternary structure of each protein?

1 answer:

3 0

Primary structure is the order in which what amino acid bound the other with a peptide bond. This is coded for by the order of codons in a gene

secondary structure is how the chains on amino acids interact with each other to form beta barrels and alpha helixes. This structure is determined by hydrogen bonds between the different amino acids

Tertiary structure is when the secondary structures interact with each other through disulphide bonds, hydrogen bonds hydrophobic/ hydrophilic interactions etc. This is all determined by the placement of certain anino acids within the proteins secondary structure

hope this helped you!!!!

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Yusef adds all of the values in his data set and then divides by the number of values in the set. What is Yusef most likely find

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He is most likely finding the mean of the data.

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2 years ago

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Which of these is an example of a physical change ?

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It's 1. Melting a substance. The rest are chemical changes

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3 years ago

A reaction of 41.9 g of Na and 30.3 g of Br2 yields 36.4 g of NaBr . What is the percent yield?

Licemer1 [7]

Answer: The percent yield is, 93.4%

Explanation:

First we have to calculate the moles of Na.

$\text{Moles of Na}=\frac{\text{Mass of Na}}{\text{Molar mass of Na}}=\frac{41.9g}{23g/mole}=1.82moles$

Now we have to calculate the moles of $Br_2$

${\text{Moles of}Br_2} = \frac{\text{Mass of }Br_2 }{\text{Molar mass of} Br_2} =\frac{30.3g}{160g/mole}=0.189moles$

${\text{Moles of } NaBr} = \frac{\text{Mass of } NaBr }{\text{Molar mass of } NaBr} =\frac{36.4g}{103g/mole}=0.353moles$

The balanced chemical reaction is,

$2Na(s)+Br_2(g)\rightarrow 2NaBr$

As, 1 mole of bromine react with = 2 moles of Sodium

So, 0.189 moles of bromine react with = $\frac{2}{1}\times 0.189=0.378$ moles of Sodium

Thus bromine is the limiting reagent as it limits the formation of product and Na is the excess reagent.

As, 1 mole of bromine give = 2 moles of Sodium bromide

So, 0.189 moles of bromine give = $\frac{2}{1}\times 0.189=0.378$ moles of Sodium bromide

Now we have to calculate the percent yield of reaction

$\%\text{ yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100=\frac{0.353 mol}{0.378}\times 100=93.4\%$

Therefore, the percent yield is, 93.4%

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3 years ago

Heterozygous- a person having two different alleles for a gene is also called

Lisa [10]

Answer:

heterozygous.

Explanation:

A genotype consisting of two different alleles of a gene for a particular trait (Aa). Individuals who are heterozygous for a trait are referred to as heterozygotes.

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2 years ago

Following the Napoleonic Wars , the congress of vienna took steps meant to:

Slav-nsk [51]

Answer:

Prevent any European country from growing much stronger than its neighbors.

Explanation:

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3 years ago