The Unsung Scientist Behind the Building Blocks of DNA | Marie M. Daly

Marie Maynard Daly made significant contributions to genetics and medicine. Her research on atherosclerosis linked cholesterol to heart disease. She was the first Black woman in the U.S. to earn a Ph.D. in chemistry. Daly's work on DNA identified key nucleic acids and disproved the tetranucleotide hypothesis. She also discovered the role of histones in gene expression, which is crucial for understanding how genetic information is translated into proteins. Her findings laid the groundwork for modern genetics and cell biology.

What was one of Marie Maynard Daly's early research contributions related to heart disease?

• She developed a new method for DNA sequencing.

• She identified the role of histones in gene expression.

• She linked high cholesterol diets to arterial lesions.

• She discovered the structure of DNA.

What significant discovery did Daly make about the components of DNA?

• DNA contains only three types of nucleic acids.

• DNA bases are adenine, guanine, thymine, and cytosine.

• DNA is a single-stranded molecule.

• DNA is composed of proteins.

Which hypothesis did Daly's research help disprove?

• The presence of tetranucleotides in DNA.

• The double helix model of DNA.

• The role of RNA in protein synthesis.

• The existence of only two DNA bases.

What role do histones play in the cell according to Daly's research?

• They are the main building blocks of DNA.

• They are responsible for DNA replication.

• They help determine which parts of the genome to read.

• They act as enzymes in metabolic reactions.

What amino acids did Daly find to be significant in histones?

• Glycine and alanine

• Lysine and arginine

• Serine and threonine

• Valine and leucine