DNA

What is DNA an example of?

• A protein

• A nucleic acid

• A carbohydrate

• A lipid

What are the components of a DNA nucleotide?

• Amino acid, phosphate group, nitrogenous base

• 5-carbon sugar, phosphate group, amino acid

• 5-carbon sugar, phosphate group, nitrogenous base

• Glycerol, fatty acids, phosphate group

How are nucleotides joined together in DNA?

• Hydrogen bonds

• Ionic bonds

• Covalent bonds

• Peptide bonds

What is the sugar component of a DNA nucleotide called?

• Glucose

• Ribose

• Deoxyribose

• Fructose

What type of molecule are nucleic acids described as?

• Short, basic molecules

• Long, slightly acidic molecules

• Short, slightly basic molecules

• Long, neutral molecules

What are the four kinds of nitrogenous bases used in DNA?

• Adenine, Guanine, Cytosine, Thymine

• Adenine, Guanine, Cytosine, Uracil

• Adenine, Guanine, Uracil, Thymine

• Adenine, Guanine, Cytosine, Ribose

How are nucleotides joined together in a DNA strand?

• By hydrogen bonds between the sugar of one nucleotide and the phosphate group of the next

• By covalent bonds between the sugar of one nucleotide and the phosphate group of the next

• By ionic bonds between the sugar of one nucleotide and the phosphate group of the next

• By peptide bonds between the sugar of one nucleotide and the phosphate group of the next

Can nucleotides join in any specific order to form a DNA strand?

• Yes, but only in a specific sequence

• No, they cannot join in any order

• Yes, they can join in any sequence

• No, they must be paired specifically as A-T and G-C

Who discovered that the percentages of the bases Adenine (A) and Thymine (T), and Guanine (G) and Cytosine (C) are almost equal in any sample of DNA?

• Gregor Mendel

• Rosalind Franklin

• James Watson

• Edwin Chargaff

What became known as "Chargaff's Rule"?

• A=T and G≠C

• A=T and G=C

• A≠T and G=C

• A≠T and G≠C