Question

after reading the following paragraph, answer questions 5 and 6. youre the manager of a factory that produces enzyme - washed blue jeans (the enzymes lighten the color of the denim, giving a faded appearance). when the most recent batch of fabric came out of the enzyme wash, however, the color wasnt light enough to meet your standards. your quality control laboratory wants to do some tests to determine why the wash enzymes didnt perform as expected. 5. which hypothesis is most likely to be productive for the initial investigation? (a) the nucleotide chain of the enzymes may be incorrectly formed. (b) the dye in the fabric may have hydrolyzed the fatty acids in the enzymes. (c) the polysaccharides in the enzymes may have separated in the wash water. (d) the three - dimensional amino acid structure of the enzyme may have been altered. 6. based on your understanding of enzyme structure, which of the following would you recommend that the lab also investigate? (a) the temperature of the liquid in the washing vat (b) washing the blue jeans in smaller vats (c) the manufacturer of the fabric (d) switching to another product for the enzyme wash 7. the molecular formula for glucose is c₆h₁₂o₆. what would be the molecular formula for a polymer made by joining 10 glucose molecules together by dehydration reactions? (a) c₆₀h₁₂₀o₆₀ (b) c₆h₁₂o₆ (c) c₆₀h₁₀₂o₅₁ (d) c₆₀h₁₀₀o₅₀ 8. which of the following pairs of base sequences could form a short stretch of a normal double helix of dna? (a) 5-agca-3 with 3-ucgu-5 (b) 5-agct-3 with 5-tcga-3 (c) 5-gcgc-3 with 5-tata-3 (d) 5-atgc-3 with 5-gcat-3 9. water is an excellent solvent. select the property that justifies this statement. (a) as a polar molecule, it can surround and dissolve ionic and polar molecules. (b) it forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with nonpolar molecules. (c) it forms hydrogen bonds with itself so cohesion is possible. (d) it is liquid and will adhere to many substances. 10. if three molecules of a fatty acid (each with formula of c₁₆h₂₂o₂) are joined to a molecule of glycerol (c₃h₈o₃), the resulting molecule would have the formula (a) c₄₈h₆₆o₆. (b) c₄₈h₆₀o₃. (c) c₅₁h₆₈o₆. (d) c₅₁h₇₄o₉.

Explanation:

Question 5:

Enzymes are proteins and their function depends on their three - dimensional structure. Alteration in this structure can affect their activity. Options A, B and C are less likely as enzymes don't have nucleotide chains, polysaccharides are not a main component of enzymes in this context and the fabric dye is not likely to hydrolyze fatty acids in enzymes.

Question 6:

Temperature can affect enzyme activity. Enzymes have an optimal temperature range for activity. Options B, C and D are not directly related to enzyme structure - function relationships in the context of why the enzyme - wash didn't work.

Question 7:

When 10 glucose ($C_6H_{12}O_6$) molecules join by dehydration reactions, 9 water ($H_2O$) molecules are removed. The calculation is: $(10\times C_6H_{12}O_6)-9\times H_2O = C_{60}H_{102}O_{51}$.

Question 8:

In DNA, base - pairing rules state that A pairs with T and G pairs with C. Option D follows the correct base - pairing rules for DNA.

Question 9:

Water is a polar molecule. Its polarity allows it to surround and dissolve ionic and polar molecules, making it an excellent solvent.

Question 10:

When three fatty acid molecules ($C_{16}H_{32}O_2$) join with a glycerol molecule ($C_3H_8O_3$) in a dehydration synthesis reaction, 3 water ($H_2O$) molecules are removed. The calculation is: $(3\times C_{16}H_{32}O_2)+C_3H_8O_3 - 3\times H_2O=C_{51}H_{98}O_6 - 3H_2O = C_{51}H_{92}O_3$. But there is a mistake in the problem setup as the fatty acid formula given in the question ($C_{16}H_{22}O_2$) is incorrect for typical long - chain fatty acids. Assuming the correct fatty acid formula $C_{16}H_{32}O_2$, the correct answer is $C_{51}H_{92}O_3$. If we calculate with the given wrong formula: $(3\times C_{16}H_{22}O_2)+C_3H_8O_3-3\times H_2O = C_{51}H_{66}O_6 - 3H_2O=C_{51}H_{60}O_3$. But if we assume the correct biochemistry principles and correct fatty acid formula for a triglyceride formation, the correct calculation gives $C_{51}H_{98}O_6- 3H_2O = C_{51}H_{92}O_3$. However, if we follow the problem as is with the incorrect fatty acid formula in the question for calculation:
$(3\times C_{16}H_{22}O_2)+C_3H_8O_3 - 3\times H_2O=(C_{48}H_{66}O_6)+C_3H_8O_3-3H_2O = C_{51}H_{68}O_6$

Answer:

1. D. The three - dimensional amino acid structure of the enzyme may have been altered.
2. A. the temperature of the liquid in the washing vat
3. C. $C_{60}H_{102}O_{51}$
4. D. 5’ - ATGC - 3’ with 5’ - GCAT - 3’
5. A. As a polar molecule, it can surround and dissolve ionic and polar molecules.
6. C. $C_{51}H_{68}O_6$ (based on the incorrect fatty acid formula in the problem)