Lecture 15

What are the monomeric units that make up DNA and RNA?

• Amino acids

• Nucleotides

• Fatty acids

• Monosaccharides

Nucleotides consist of:

• A lipid bilayer and proteins.
• A single carbon atom and oxygen.
• A phosphate group, a five-carbon sugar, and a nitrogenous base.
• A sugar and a protein only.

Which component of a nucleotide gives it its coding identity?

• Phosphate group

• Five-carbon carbohydrate

• Nitrogenous base

• Hydrogen bond

What type of sugar is found in a nucleotide?

• Hexose

• Aldopentose

• Ketose

• Disaccharide

How many phosphate groups can a nucleotide have?

• One, two, or three

• Only one

• Two or four

• Three or four

Which of the following are purines?

• Adenine and Guanine

• Cytosine and Thymine

• Thymine and Uracil

• Cytosine and Uracil

Which of the following are pyrimidine?

• Adenine

• Cytosine

• Thymine

• Uracil

Which nitrogenous base is found in RNA but not in DNA?

• Thymine

• Uracil

• Adenine

• Guanine

Which base pairs with adenine in DNA?

• Cytosine

• Guanine

• Thymine

• Uracil

What can the 2' position in ribose sugar be in RNA and DNA?

• An OH group in RNA and an H in DNA

• An H group in RNA and an OH in DNA

• An OH group in both RNA and DNA

• An H group in both RNA and DNA