DNA Structure and Replication

What is the basic structure of DNA?

• single strand

• triple helix

• square shape

• double helix

If a DNA strand has 35% A, what percent T would be present?

• 25%

• 35%

• 15%

• 20%

What is the base pair rules?

• A goes with T, C goes with G

• A goes with G, C goes with T

• A goes with C, G goes with T

• A goes with U, C goes with G

Which nucleotide pairs with adenine in DNA?

• cytosine

• guanine

• thymine

• uracil

What is the process of DNA replication?

• DNA replication is the process by which a double-stranded RNA molecule is copied to produce two identical RNA molecules.

• DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.

• DNA replication is the process by which RNA is copied to produce two identical RNA molecules.

• DNA replication is the process by which a single-stranded DNA molecule is copied to produce two identical DNA molecules.

What is the role of DNA polymerase in replication?

• DNA polymerase helps in the formation of RNA during replication.

• DNA polymerase unzips the DNA strands

• DNA polymerase breaks down the existing DNA strands during replication.

• DNA polymerase adds in the new bases following the base pair rules

What is meant by semi-conservative replication?

• Each new DNA molecule consists of one original strand and one strand from another DNA molecule.

• Each new DNA molecule consists of two newly synthesized strands.

• Each new DNA molecule consists of two original strands.

• Each new DNA molecule consists of one original strand and one newly synthesized strand.

Which enzyme unwinds the DNA double helix during replication?

• ligase

• topoisomerase

• polymerase

• helicase

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Tags

NGSS.HS-LS1-1