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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Last one is B
To answer the first question, you need to understand the composition of a jelly doughnut and how the body derives energy from it. The majority of the energy in a doughnut comes from carbohydrates, specifically sugar. The correct answer is C. carbohydrate; contains a low ratio of oxygen atoms. This is because carbohydrates provide energy through a process called cellular respiration, where oxygen is used to break down the sugar molecules and release energy.
For the second question, you need to know about the structure of an amino acid and the functional groups it contains. The functional group that determines the specific shape and function of an amino acid is the R group. The R group varies among different amino acids and gives them their unique properties. Therefore, the correct answer is A. R group.
Regarding the third question, it is about macromolecules and their monomers and bonds. The incorrect pairing is D. monosaccharide; glycosidic link. Monosaccharides are the monomers of carbohydrates, and they are joined together by a glycosidic bond to form polysaccharides (not macromolecules). The correct bond for this pairing would be C. nucleotide; hydrogen bond, as nucleotides are monomers of nucleic acids, and hydrogen bonds help hold the individual nucleotides together in a DNA or RNA polymer.
So, the correct answers are:
1. C. carbohydrate; contains a low ratio of oxygen atoms.
2. A. R group.
3. D. monosaccharide; glycosidic link (incorrect).