Complementary Relationships Between Purines and Pyrimidines

question 38

Multiple Choice

Complementary relationships between purines and pyrimidines

• A)allow adenine to form two hydrogen bonds with thymine (or uracil)and guanine to form three hydrogen bonds with cytosine to form double-stranded nucleic acids.
• B)allow the interaction of the oppositely charged amino acids to form the tertiary structure of proteins.
• C)allow adjacent bases in a nucleotide chain to stack tightly,stabilizing the DNA double helix.
• D)provide highly ordered,repetitive bonding to form α helices and β sheets within proteins.
• E)Both A and C are correct.

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Definitions:

Sandra Scarr

An American developmental psychologist known for her work on genetic and environmental influences on human development.

Gregor Mendel

A scientist and Augustinian friar who is known as the father of modern genetics for his work on the inheritance of traits in pea plants.

Multifactorial Transmission

The determination of traits by a combination of both genetic and environmental factors in which a genotype provides a range within which a phenotype may be expressed.

Genetic Factors

Elements within an organism's genetic makeup that influence its physical and behavioral traits.