8.2 Quizizz: Structure of DNA

The four types of nucleotides that make up DNA are named for their

• hydrogen bonds.

• nitrogen-containing bases.

• phosphate groups.

• ring-shaped sugars

After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases?

• A = T and C = G

• A=C=G=T

• A = C and G = T

• A+T=C+G

Which of the following DNA sequences is complementary to the base sequence ACCGTAT?

• GTTACGC

• UCCGTAT

• TGGCATA

• CAATGCG

Combining the work of other scientists with their own research, Watson and Crick discovered that two strands of DNA join together to form a(n)

• nucleotide.

• X in a circle.

• double helix.

• covalent bond.

What holds base pairs together?

• hydrogen bonds

• sugar-phosphate backbones

• pairs of double-ringed nucleotides

• nitrogen-carbon bonds