Unit 8.3 DNA and Protein Synthesis (Replication)

What are the nucleotides of DNA?

• A T G C

• A U G C

• A T U G C

• A T U C

About how many base pairs are contained in human DNA?

• about 20

• 3

• about 2000

• about 3 billion

What is the process called that makes an exact copy of DNA?

• Replication

• Transcription

• Translation

• Mutation

What process is shown here?

• Replication

• Transcription

• Translation

• Protein synthesis

What protein “unzips” the original DNA strand so each side can be used as a template?

• Helicase

• DNA polymerase

• Protease

• RNA polymerase

Which of the following is a job of DNA polymerase?

• Unzips the double helix before replication

• Builds the new DNA strand according to the original template

• Proofreads RNA before it leaves the nucleus

• Re-zips the double helix after replication is complete

Which of the following is a job of DNA polymerase?

• Unzips the double helix before replication

• Proofreads the new DNA strand to prevent mutations

• Builds mRNA so it can be used to make protein

• Re-zips the double helix after replication is complete

What protein "re-zips" both new DNA strands after replication is complete?

• Helicase

• DNA polymerase

• Protease

• RNA polymerase

Which statement BEST describes the result of DNA replication?

• One double-stranded molecule is used to produce two different double-stranded molecules.

• One double-stranded molecule is used to produce two identical double-stranded molecules.

• Two double-stranded molecules are used to produce a single different double-stranded molecule.

• Two double-stranded molecules are used to produce a single identical double-stranded molecule.

In cells of all organisms, adenine (A) and thymine (T) are in equal amounts, while guanine (G) and cytosine (C) are in equal amounts. If there are 100 nucleotides in a DNA section, and 20 are C then how many T are there?

A(__) - T(_?_) - C(20) - G(20)

• 100

• 60

• 30

• 20