Natural Selection and Adaptations

What is the shape of DNA?

• Double helix

• Single strand

• Triple helix

• Circular

Which scientist used x-rays to study the shape of DNA?

• Rosalind Franklin

• James Watson

• Francis Crick

• Erwin Chargaff

During DNA replication, what pairs with adenine (A)?

• Thymine (T)

• Cytosine (C)

• Guanine (G)

• Uracil (U)

The process of making mRNA from DNA is called _______.

What type of mutation involves the addition of one or more nitrogen bases?

• Insertion

• Deletion

• Substitution

• Translocation

Tags

NGSS.HS-LS3-2

The nitrogen bases form the ______ of the DNA ladder.

A mutation that is neither beneficial nor harmful is called _______.