Problem Drinking and Drug Use Is Part of the Lifestyle

question 16

Multiple Choice

Problem drinking and drug use is part of the lifestyle of many young adults.In a longitudinal study of 33,000 people,what was the typical course of these behaviors?

• A)They begin to decline when adults reach their mid-thirties.
• B)They begin to decline when adults reach their mid-twenties.
• C)They tend to stay about the same throughout middle adulthood.
• D)They have no serious effects on behavioral or cognitive functioning.

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Definitions:

Hydrogen Bonds

A fragile connection between two molecules caused by the electrostatic pull between a proton in one molecule and an atom with high electronegativity in the other.

DNA Polymerase

An enzyme that plays a critical role in DNA replication, helping to build new strands of DNA based on the template provided by the original strand.

Mutations

Changes in the DNA sequence of an organism's genome, which can affect genotype and potentially phenotype.

Semiconservative Replication

Describes the process of DNA replication in which one strand of each copy of a DNA molecule is new, and the other is a strand of the original DNA.