Choose the One Most Appropriate Answer for Each

question 56

Multiple Choice

Choose the one most appropriate answer for each.
-Chargaff

• A)Discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
• B)First to describe DNA and extract it from cell nuclei
• C)Discovered that DNA-digesting enzymes prevented bacterial transformation
• D)The first to build an accurate model of DNA and to describe it explicitly in a publication
• E)The first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
• F)Provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
• G)Worked at King's College at the same time as Franklin
• H)Obtained excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units

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Definitions:

Physical Changes

Alterations in the physical state or appearance of a substance or object, without changing its chemical composition.

Deterioration

The process of becoming progressively worse or the decline in quality or condition.

Mental Abilities

The cognitive capacities that include reasoning, problem-solving, planning, abstract thinking, comprehension, and learning.

Old Age

The latter part of life, typically defined as the period of life after retirement, or the ages around or beyond 65 years, characterized by changes in physical, social, and cognitive abilities.