Question

1. nucleic acids, such as rna, consist of monomers of __________. each of these monomers consists of , , and .a. amino acids; side chain, carboxyl group, glucoseb. nucleotides; side chain, sugar, nitrate groupc. nucleotides; sugar, nitrogenous base, phosphate groupd. amino acids; sugar, nitrogenous base, phosphate group23. there are five types of nitrogenous bases, four of which are found within dna molecules. these are:a. adenine, thymine, guanine, uracilb. adenine, uracil, guanine, cytosinec. adenine, thymine, cytosine, guanined. adenine, uracil, phosphate, ribose24. which of the following best describes the form and function of one type of nucleic acid?a. rna, a double helix, functions primarily as an archive of genetic information.b. rna, a single helix, functions primarily as an archive of genetic information.c. dna, a single helix, functions primarily as an archive of genetic information.d. dna, a double helix, functions primarily as an archive of genetic information.25. the nucleotides of dna form ________ bonds. ____ bonds with guanine and ____ bonds with ____.a. oxygen; cytosine, adenine, uracilb. hydrogen; guanine, adenine, cytosinec. hydrogen; cytosine, adenine, thymined. helium; cytosine, adenine, thymine26. molecules may be hydrophobic, hydrophilic or amphiphilic. lipids are either ____ or ______.a. hydrophilic, amphiphilicb. hydrophobic, amphiphilicc. hydrophobic, hydrophilicd. hydrophilic, hydrophilic

Explanation:

• Question 22: Nucleic acids (like RNA) are made of nucleotides. Each nucleotide has a sugar, a nitrogenous base, and a phosphate group.
• Question 23: DNA has four nitrogenous bases: adenine, thymine, cytosine, and guanine.
• Question 24: DNA is a double helix and functions as an archive of genetic information.
• Question 25: DNA nucleotides form hydrogen bonds. Guanine bonds with cytosine, and adenine bonds with thymine.
• Question 26: Lipids are either hydrophobic (e.g., fats) or amphiphilic (e.g., phospholipids).

Answer:

• 22. c
• 23. c
• 24. d
• 25. c
• 26. b