8 Questions
Johannes Friedrich Miescher was the 1st person to describe and extract ______
DNA
Oswald Avery and Maclyn McCarty concluded that ______ is the transforming principle.
DNA
Fred Griffith transferred hereditary material from dead cells to live cells; he used two strains of Streptococcus pneumoniae in his experiment. Mice A – injected with live R cells, lived. Mice B – injected with live S cells, died. Mice C – injected with killed S cells, died. Mice D – injected with killed S cells and live R cells died, live S cells are found in the blood. Harmless bacteria can become transformed into disease-causing bacteria by a bacteria transformation factor. The experiment demonstrated ______ transformation.
bacterial
Alfred Hershey and Martha Chase used radioactive phosphorus (32P) and radioactive sulfur (35S); bacteriophages transfer their DNA, not their coat proteins, into their hosts. They concluded that ______, not protein, is the material that stores hereditary information.
DNA
Rosalind Franklin used x-ray crystallography to determine many aspects of DNA’s ______.
structure
James Watson and Francis Crick constructed the DNA double helix model. DNA stands for deoxyribonucleic acid; consists of 5-C sugar (deoxyribose), 3 phosphate groups, 1 of 4 nitrogen-containing bases (purines: adenine, guanine; pyrimidines: thymine, cytosine). RNA contains adenine, guanine, thymine, ______.
uracil
DNA consists of a 5-C sugar called ______.
deoxyribose
The four nitrogen-containing bases in DNA are adenine, guanine, thymine, and ______.
cytosine
Test your knowledge about key figures in DNA discovery such as Johannes Friedrich Miescher and Fred Griffith. Learn about significant experiments like the one involving Streptococcus pneumoniae strains. Understand how harmless bacteria can be transformed into disease-causing ones.
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