Unit 7: Molecular Biology

Which choice describes a chromosome in a prokaryotic cell?

• linear in the nucleus

• circular in the nucleus

• linear in the cytoplasm

• circular in the cytoplasm

What is the correct description of eukaryotic chromosomes?

• many linear pieces of DNA in the cytoplasm

• many linear pieces of DNA in the nucleus

• one circular piece of DNA in the cytoplasm

• many circular pieces of DNA in the nucleus

What is the process for making another DNA copy of a chromosome?

• replication

• transcription

• translation

• chromatin

Which choices describe DNA replication?

• semiconservative

• produces two pieces of DNA identical to the original

• products are half original and half new

• all of the above

Where in the cell does DNA replication occur?

• always the cytoplasm

• always the nucleus

• in the cytoplasm in eukaryotes and the nucleus in prokaryotes

• in the cytoplasm in prokaryotes and the nucleus in eukaryotes

What is the enzyme responsible for DNA replication?

• DNA polymerase

• RNA polymerase

• ribosome

• nucleolus

What does DNA polymerase do?

• connects sugars and phosphates with weak hydrogen bonds

• connects sugars and phosphates with strong covalent bonds

• connects bases with strong hydrogen bonds

• connects bases with strong covalent bonds

What are the 2 functions of DNA polymerase?

• makes DNA and RNA

• makes DNA and protein

• makes DNA and fixes its mistakes

• makes RNA and protein

When in the cell cycle is DNA replication?

• S phase of interphase

• Go of interphase

• mitosis

• meiosis

What is the structure of the DNA during DNA replication?

• wrapped around histones in chromatin form

• tightly coiled into chromosomes

• just as it appears in a karyotype

• DNA has no structure during replication