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Sitara S.
PhD Student in Biomedical Engineering
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Biochemistry
TutorMe
Question:

How do the different properties of amino acids function in protein folding?

Sitara S.
Answer:

Hydrophobicity/hydrophilicity: Hydrophobic amino acids are water fearing, and prefer to be in the interior of the protein. Hydrophilic amino acids are water loving and prefer to be on the exterior of the protein. Positive/negative charges: Amino acids of the same charge are repelled and amino acids of opposite charges are attracted. Disulfide bonds: Cysteines contain sulfurs which form disulfide bridges

Biology
TutorMe
Question:

What are three the major differences in transcription and translation in prokaryotes versus eukaryotes?

Sitara S.
Answer:

1. In prokaryotes, transcription and translation occur simultaneously, whereas in eukaryotes, transcription first occurs in the nucleus, and then translation occurs in the cytoplasm. 2. Intron and exon splicing occurs post transcription in eukaryotes, but not in prokaryotes. 3. Eukaryotes have three types of RNA polymerase and prokaryotes only have one.

Algebra
TutorMe
Question:

Jessica is selling fruit at a fruit stand. She sold ten more oranges than apples and twice as many pears as apples. If an apple is $1, and orange is $2,a pear is $3, and Jessica made $100, how many of each fruit did she sell?

Sitara S.
Answer:

Let x = number of apples sold. x + 10 = number of oranges sold 2x = number of pears sold Set up an equation to calculate how many apples sold by multiplying each fruit by its price and setting it equal to the total amount of money made. 1x + 2(x+10) + 3*2x = 100 Distribute. x + 2x + 10 + 6x = 100 9x + 10 = 100 9x = 90 x = 10 10 apples sold x + 10 = oranges sold 10 + 10 = 20 oranges sold 2x = pears sold 2*10 = 20 pears sold

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