Choose the One Most Appropriate Answer for Each

question 25

Multiple Choice

Choose the one most appropriate answer for each.
-Griffith

• 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:

Mitosis

A process of cell division in eukaryotic cells by which a cell divides into two genetically identical daughter cells.

Mutations

Changes in the DNA sequence of a cell's genome, which can lead to variations in physical appearance, behavior, or health.

DNA Helix

The double-stranded, spiral structure of DNA that carries genetic information necessary for cell growth, division, and function.

Gene

The basic unit of heredity. Genes are composed of deoxyribonucleic acid (DNA).