The DNA Double Helix Discovery

What two molecules are chromosomes made of?

• DNA and genes

• DNA and proteins

• cheeseburgers and fries

Why did many scientists at the time think proteins must carry genetic information?

• Mendel found a lot of protein in pea plants.

• DNA was not found in the nucleus of cells.

• Proteins had lots of variety and could do many jobs in the cell.

What three structures make up DNA molecules?

• carbon dioxide, oxygen, glucose

• proteins, enzymes, and sugars

• sugar, phosphate group, and a nitrogen base

There were not many women, especially outgoing and assertive ones like Rosalind Franklin, working in science labs during the 1950s. 

• FALSE

• TRUE

Working on scientific problems requires collaboration with others and trial and error.

• TRUE

• FALSE

Even before they knew the exact structure, the scientists working on the DNA puzzle knew it was a helix.  What does a helix look like?

• a step ladder

• a spiral staircase

• a log cabin

• a long straight chain

Who took the famous Photo 51 of DNA that helped Watson and Crick?

• Maurice Wilkins

• Linus Pauling

• Rosalind Franklin

• Mrs. Feather

What did Watson and Crick figure out about the "rungs" of the DNA ladder using Chargaff's data? 

• A paired with A and T paired with T to make each rung

• A and T paired up together and C and G paired up together to make the rungs

• one A, T, C, or G made each rung

Which of the follwing is true? (You may choose more than one answer.)

• Erwin Chargaff and Linus Pauling won the Nobel Prize for discovering DNA's structure.

• Watson and Crick received the Nobel Prize for determining that DNA was a triple helix.

• Rosalind Franklin was not recognized for her contributions to the discovery of DNA.

• Watson and Crick received the Nobel Prize for determing that DNA was a double helix.

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