DNA Scientist & Structure Flashcard

Front

Who determined that heat killed pneumonia bacteria could transfer the deadly 'factor' to harmless rough bacteria?

Back

Fredrick Griffith

Front

Which scientists are credited with discovering that the shape of a DNA molecule is a double helix?

Back

Watson and Crick

Front

Who used chemistry and the percentage of nitrogenous bases in DNA samples to determine which bases bond together?

Back

Erwin Chargaff

Front

What type of bond holds together the nitrogen bases in DNA?

Back

Hydrogen bond

Front

Which scientists determined that bacteriophage viruses were injecting their DNA into bacteria?

Back

Hershey and Chase

Front

What is the structure of DNA?

Back

DNA is a double helix composed of two strands of nucleotides.

Front

What are the four nitrogenous bases in DNA?

Back

Adenine (A), Thymine (T), Cytosine (C), Guanine (G).

Front

What is Chargaff's rule?

Back

In DNA, the amount of adenine equals thymine, and the amount of cytosine equals guanine.

Front

What is the role of hydrogen bonds in DNA?

Back

Hydrogen bonds hold the two strands of DNA together by connecting complementary nitrogenous bases.

Front

Who was Rosalind Franklin and what was her contribution to DNA research?

Back

Rosalind Franklin was a scientist whose X-ray diffraction images of DNA helped reveal its double helix structure.