DNA Structure, Function, and Replication

Whose discovery about base ratios led to the rule of base pairing?

• Rosalind Franklin

• Watson and Crick

• Erwin Chargaff

• Maurice Wilkins

Whose work in X-ray diffraction revealed the double helix structure of DNA?

• Rosalind Franklin

• James Watson

• Francis Crick

• Maurice Wilkins

Tags

NGSS.HS-LS1-1

Why can bacteria recognize a human gene and then produce a human protein?

• Cell division in bacteria and humans is the same.

• Bacterial cells contain the same organelles as human cells.

• The basic DNA components are the same in humans and bacteria.

• Bacteria and human cells have the same number of chromosomes.

Tags

NGSS.HS-LS1-1

The structure of DNA is a twisted ladder shape called a _________________.

• helix

• single helix

• double helix

• triple helix

The two sides of the DNA ladder are made up of ____________________________________________.

• sugars and phosphates

• traits and characteristics

• DNA and RNA

When replication is complete, there are two _____________ DNA modules.

• identical

• different

• similar

______________ always pairs with thymine.

• Cytosine

• Guanine

• Adenine

Cytosine always pairs with __________________.

• cytosine

• thymine

• guanine

• adenine

In a(n) ____________________ mutation, an extra base is added.

• substitution

• insertion

• deletion

Tags

NGSS.HS-LS3-2

In a ________ mutation, a base is left out.

• substitution

• insertion

• deletion