AP Biology

Who's work concluded that the %A=%T  and %G=%C

• Chargaff

• Meischer

• Levene

• Hammerling

The new DNA on the leading strand is synthesized in the _________ direction

• 5' to 3'

• 3' to 5'

DNA replication was proved by the experiments of:

• Hershey & Chase

• Meselson & Stahl

• Watson & Crick

• Franklin & Gosling

The enzyme that removes RNA Primers and fills in the gaps with DNA Nucleotides is

• DNA Polymerase III

• DNA Polymerase I

• DNA Polymerase II

• Primase

A scientist observes a base sequence of AGCTAGCTAGCT.  Which of the following would be the complimentary strand?

• TGCATGCATGCA

• TCGATCGATCGA

• TAGCTAGCTAGC

• TTAAGGCCTTCC

The separation of the two single strands of DNA creates a ‘Y’ shape?

• enzyme

• unzip

• A replication fork

Which enzyme proofreads and removes RNA Primase

• Ligase

• Polymerase 1

• Polymerase 3

• Helicase

What strand is copied faster?

• Leading

• Lagging

According to the fluid mosaic model of cell membranes, phospholipids___________________.

• can shift laterally along the plane of the membranee

• frequently flip-flop from one side of the membrane to the other

• occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane

• have hydrophilic tails in the interior of the membrane

Which of the following types of molecules are hydrophilic and therefore excluded from the hydrophobic portion of the phospholipid bilayer?

• transmembrane proteins

• integral membrane proteins

• peripheral proteins

• cholesterol