Chapter 13

Question 1

transformation

Answer 1

Griffith (rats) discovered it- a substance from cells of one strain (even when dead) could produce a heritable change in the other stran

Question 2

Avery

Answer 2

DNase destroyed the transforming substance, the transforming substance is DNA

Question 3

Hershey-Chase

Answer 3

proteins carry genetic info

Question 4

Watson and Crick (Franklin)

Answer 4

DNA is a double helix

Question 5

semiconservative

Answer 5

each parent strand is a template; new molecules have one old and one new strand

Question 6

conservative

Answer 6

original molecule serves as a template only

Question 7

dispersive

Answer 7

fragments of DNA are templates, old and new parts are assimilated into new molecules

Question 8

primase

Answer 8

primer is complementary to the DNA template and is synthesized by it

Question 9

DNA polymerase

Answer 9

adds nucleotides to the 3’ end until the section is complete, and the primer is degraded

Question 10

DNA helicase

Answer 10

uses energy from ATP to unwind DNA

Question 11

Single-strand binding protein

Answer 11

keeps the strands from joining once more

Question 12

okazaki fragments

Answer 12

synthesis of lagging strand occurs in small, discontinuous stretches called those

Question 13

ligase

Answer 13

enzyme that joins the okazaki fragments

Question 14

direction it works in (leading to lagging strands directions)

Answer 14

normal: