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If you ate a jelly doughnut for breakfast, the majority of the energy would come from the _________ in the doughnut because it _________.

A. fat; contains a low ratio of oxygen atoms.
B. sugar; contains high ratio of oxygen atoms.
C. carbohydrate; contains a low ratio of oxygen atoms. ***
D. protein; contains nitrogen in place of oxygen atoms.

Amino acids are the monomers of proteins. Which functional group in the amino acid determines its specific shape and function?
A. R group ***
B. amino group
C. carboxyl group
D. hydroxyl group

This is a picture of sucrose, a disaccharide, a molecule composed of two monosaccharides: glucose and fructose. Macromolecules are formed when monomers are bonded together. The different macromolecules have different monomers and different types of bonds. Which of these does NOT correctly pair the monomer and the bond used to make a polymer?
A. fatty acid; ester link
B. amino acid; hydrogen bond
C. nucleotide; hydrogen bond
D. monosaccharide; glycosidic link ***

Could someone check these? Thank you

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2 answers
  1. Since we don't have a biology specialist here, and no one else has responded to your posts, my suggestion is that you go here — https://www.khanacademy.org — click on Courses (upper left) and choose the biology courses and topics you need.

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    Writeacher
  2. Last one is B

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