1a. Which of the following statements is NOT always correct? a. Hydrogen bonding
ID: 186819 • Letter: 1
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1a. Which of the following statements is NOT always correct? a. Hydrogen bonding is responsible for many of the properties of water, including its ability to act as an effective solvent. b. Both hydrogen bonds and van der Waals interactions depend on dipoles, or the separation of positive and negative charge within and between molecules. c. The affinity of one molecule for another is determined by a combination of noncovalent bonds, including hydrogen bonds, ionic bonds, van der Waals interactions, and hydrophobic interactions. d. Covalent bonds are characterized by equal sharing of electrons between two atoms. 1b. Which of the following is NOT a difference between DNA and RNA? a. The sugar component of the RNA nucleotides contains an additional hydroxyl group. b. RNA bases include two purines and two pyrimidines, while DNA bases include two purines and three pyrimidines. c. DNA contains the base thymidine, while RNA contains uracil. d. RNA is most commonly found as a single stranded polymer, while DNA is found as a double helix. 1a. Which of the following statements is NOT always correct? a. Hydrogen bonding is responsible for many of the properties of water, including its ability to act as an effective solvent. b. Both hydrogen bonds and van der Waals interactions depend on dipoles, or the separation of positive and negative charge within and between molecules. c. The affinity of one molecule for another is determined by a combination of noncovalent bonds, including hydrogen bonds, ionic bonds, van der Waals interactions, and hydrophobic interactions. d. Covalent bonds are characterized by equal sharing of electrons between two atoms.Explanation / Answer
a. Hydrogen bonding is responsible for many of the properties of water, including its ability to act as an effective solvent.
The reason why water is a good solvent is its polarity
1b. (b) RNA bases include two purines and two pyrimidines, while DNA bases include two purines and three pyrimidines.
RNA has uracil instead of thymidine. both thymidine and uracil are pyrimidines. So in both there are 2 purines and 2 pyrimidines
a. Hydrogen bonding is responsible for many of the properties of water, including its ability to act as an effective solvent.
The reason why water is a good solvent is its polarity
1b. (b) RNA bases include two purines and two pyrimidines, while DNA bases include two purines and three pyrimidines.
RNA has uracil instead of thymidine. both thymidine and uracil are pyrimidines. So in both there are 2 purines and 2 pyrimidines
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