Analysis of Gender Differences in Life Expectancies of Americans Shows

question 29

Multiple Choice

Analysis of gender differences in life expectancies of Americans shows that

• A) males have longer life expectancies than females at every age, regardless of race and ethnicity.
• B) females have longer life expectancies than males at every age, regardless of race and ethnicity.
• C) females are more likely to live to be in their 80s, but males are more likely to live to be centenarians (100 or above).
• D) the life expectancy of black males is higher than that of black females.

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Definitions:

DNA

A double-stranded molecule consisting of nucleotides arranged in a helical structure, serving as the hereditary material in most organisms.

Purines

Nitrogenous bases found in DNA and RNA that include adenine (A) and guanine (G), playing a crucial role in encoding genetic information.

Pyrimidines

One of the two types of nitrogenous bases found in nucleic acids, including cytosine, thymine (in DNA), and uracil (in RNA).

Chargaff

Refers to Chargaff's rules, which are empirical rules regarding the ratios of nucleotide bases within DNA molecules: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).