University:
Kentucky State University
Course:
BIO 408 | Cell Biology
Academic year:

2024
Views:

470

Pages:

11
Author:

omiliar74be

chapter4 (The Basic of Molecular Diversity) 1) Which of the following molecules has a carboxyl functional group? (Concept 4.3) SHOW HINT R-OPO R-COH R-COOH R-NH2 Correct. The molecule R-COOH contains the carboxyl functional group (-COOH). The presence of this group would make the molecule a weak acid. 2) Ethanol, propanol, and methanol are three simple alcohols. They can be grouped together because they SHOW HINT Concept 4.3) are soluble in water all contain a carbonyl group share the same functional group: a hydroxyl are hydrophobic Correct. Alcohols are distinguished by the presence of the hydroxyl (-OH) functional group. 3) Which of the following molecules is a weak base? (Concept 4.3) SHOW HINT R-SH R-OH R-NH2 None of the listed responses is correct. Correct. The amino group (-NH2) of R-NH2 can function as a base. It can accept a proton (H*). 4) Which of the following molecules is a weak acid? (Concept 4.3) SHOW HINT R-COOH R-OH R-SH R-NH2 Correct. The carboxyl group (-COOH) of R- COOH can donate a proton (H+). 5) Which of the following functional groups increases the solubility of organic compounds in water? Concept 4.3) SHOW HINT -COOH -COH All of the listed responses are correct. Correct. All of the listed functional groups are hydrophilic and thus increase the solubility of organic molecules in water. 6) Which of the following examples best describes a unique functional property of the carboxyl group? (Concept 4.3) SHOW HINT It is polar as a result of the electronegative oxygen atom drawing electrons toward it. Its compounds may be structural isomers with different properties. The covalent bond between oxygen and hydrogen is so polar that hydrogen ions tend to dissociate from oxygen reversibly. Two carboxyl groups can bond covalently to help stabilize protein structure Correct. This is a property of the carboxyl group.

The Basic of Molecular Diversity

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