DNA Structure and Replication

In a DNA molecule, adenine pairs with...

• thymine

• cytosine

• guanine

• uracil

In a DNA molecule, guanine pairs with...

• cytosine

• uracil

• thymine

• adenine

What are the three parts of a DNA nucleotide?

• deoxyribose, thymine, phosphate group

• deoxyribose, uracil, phosphate group

• ribose, uracil, phosphate group

• ribose, thymine, phosphate group

What are the repeating subunits that make up DNA and RNA called?

• amino acids

• nucleotides

• fatty acids

• monosaccharides

Semiconservative replication means that...

• the daughter strands of DNA are composed of old and new strands.

• the daughter strands of DNA are composed of only old strands.

• the daughter strands of DNA are composed of only new strands

• the daughter strands of DNA are not alike

Which of the following best describes a DNA molecule?

• it is double stranded and antiparallel

• it is single stranded and antiparallel

• it is double stranded and parallel

• it is single stranded and parallel

Which statement best describes the relationship that exists among proteins, DNA, and cells?

• proteins combine to produce cells, which produce DNA

• proteins are made up of DNA, which determines the cells that are produced

• DNA is made up of proteins, which tell a cell how to function

• cells contain DNA, which controls the production of proteins

Why does DNA need to be "unzipped" before it can be replicated?

• the DNA needs to be separated into two template strands so proteins can be translated

• the DNA needs to be separated into two template strands so the mRNA can be made

• the two strands of DNA need to each be moved into a new cell before replication can occur

• the two strands of DNA need to be separated so new bases can pair with each template strand

DNA is a spiral ladder-shaped structure with the sides of the ladder representing which components?

• glucose molecules

• a pair of nitrogenous bases

• alternating sugars and phosphates

• alternating proteins and phosphates

Which complementary base pairing would most likely result during replication?

• A-G-T-T-C

  C-T-G-G-A

• C-A-G-A-C

  T-G-A-G-T

• T-A-G-C-A

  A-T-C-G-T

• G-C-T-A-G

  A-T-C-G-A