Understanding the Structure of DNA

Who were the two scientists primarily responsible for discovering the structure of DNA?

• Francis Crick and James Watson

• Albert Einstein and Niels Bohr

• Marie Curie and Louis Pasteur

• Isaac Newton and Galileo Galilei

What crucial information did Erwin Chargaff provide that helped Watson and Crick?

• The method of DNA replication

• The existence of DNA in cells

• The pairing rules of nucleotides

• The double helix structure of DNA

What technique did Wilkins and Franklin use to study DNA?

• Ultrasound imaging

• X-ray diffraction

• Nuclear magnetic resonance

• Electron microscopy

What was the name of the image that led to the breakthrough in understanding DNA's structure?

• Image 101

• Photo 51

• Picture 21

• Snapshot 11

What did Watson and Crick realize about DNA's structure after seeing Photo 51?

• It was a spiral

• It was a square

• It was a straight line

• It was a circle

What forms the backbone of the DNA structure according to Watson and Crick's model?

• Proteins and lipids

• Deoxyribose sugars and phosphate molecules

• Cytosine and Guanine

• Adenine and Thymine

How many hydrogen bonds connect cytosine and guanine?

• Four

• Two

• One

• Three

Which of the following is a pyrimidine?

• Adenine

• Guanine

• Thymine

• Uracil

Why was Rosalind Franklin not included in the Nobel Prize awarded to Watson and Crick?

• She was not involved in the research

• She was excluded due to sexism

• She refused the prize

• She had passed away before the prize was awarded

What was the main reason for Rosalind Franklin's early death?

• X-ray exposure

• A laboratory accident

• Natural causes

• A car accident