Lecture Exam 4 Review

Crossing over occurs during which phase of meiosis?

• Anaphase 1

• Prophase 1

• Metaphase 1

• Crossing over only happens in mitosis.

Cells that aren't dividing are most likely in which stage of interphase?

• G1

• G2

• G0

• S

A trait in which a single allele has multiple phenotypic effects is said to be

• Pleiotropic

• Dominant

• Epistatic

• Codominant

• Incompletely dominant

Which of these scientists did an experiment with smooth (S) and rough (R) strains of Streptococcus pneumoniae to show that transformation could occur?

• Franklin

• Hershey and Chase

• Meselson and Stahl

• Griffith

Which of these scientists did an experiment to show that DNA undergoes semiconservative replication?

• Meselson and Stahl

• Watson and Crick

• Hershey and Chase

• Chargaff

________ is the enzyme that unzips DNA during DNA replication.

• Primase

• DNA Helicase

• DNA Ligase

• DNA Polymerase III

The enzyme that joins Okazaki fragments together is called

• DNA Polymerase III

• Telomerase

• DNA Polymerase I

• DNA Ligase

Which of the following are characteristics of DNA Polymerase but not RNA Polymerase?

• Proofreading

• Nucleotides are added in a 5'-to-3' direction

• Requires a primer

• Processive (add multiple bases each time they bind DNA)

Which of the following are part of the processing of Pre-mRNA into mRNA?

• Addition of 5' cap

• Splicing out of introns

• Proofreading

• Addition of a poly A tail

• Hybridization