ET 4.1 The Double Helix 1/7/25

What was the key problem that Watson and Crick aimed to solve?

• The stability of life

• The mutability of life

• The arrangement of atoms in biological molecules

• The transmission of genetic information

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which technique did Watson and Crick use to solve the structure of DNA?

• X-ray crystallography

• Electron microscopy

• Nuclear magnetic resonance

• Mass spectrometry

What did Oswald Avery's experiments demonstrate about DNA?

• It can carry genetic information

• It is destroyed by protein-digesting enzymes

• It is made of repeated units of sugar and phosphate

• It is responsible for the stability of life

Tags

NGSS.HS-LS1-1

Who took the famous X-ray diffraction photograph of DNA known as Photo 51?

• Maurice Wilkins

• Rosalind Franklin

• James Watson

• Francis Crick

What did Watson and Crick's model of DNA reveal about genetic information?

• It is stored in the sequence of bases

• It is carried by proteins

• It is determined by the arrangement of atoms

• It is replicated through X-ray crystallography

Tags

NGSS.HS-LS3-1

What did Erwin Chargaff's research on DNA composition reveal?

• The amount of adenine is always equal to the amount of thymine

• The amount of guanine is always equal to the amount of cytosine

• The amount of adenine is always equal to the amount of guanine

• The amount of thymine is always equal to the amount of cytosine