Select all of the following that are components of DNA. (Check all that apply.)
A) A deoxyribose sugar B) A phosphate group C) The nitrogenous bases thymine, adenine, cytosine, and guanine D) Ribose sugar E) Two carbohydrate rings with hydroxide groups attached
Select all of the following statements that describe the structure of a molecule of DNA. (Check all that apply.)
A) Twisted double helix B) Single-stranded C) Contains the nitrogenous bases adenine, thymine, cytosine, and guanine D) Contains deoxyribose sugar E) Contains the nitrogenous bases adenine, uracil, cytosine, and guanine
Select all the characteristics that make sickle-cell disease a good candidate to study genetic diseases. (Check all that apply.)
A) It is easily identifiable by a physical characteristic. B) It results from a single change in a single gene. C) It can be influenced by the environment. D) The sickle-cell inheritance pattern is not influenced by other genes.