Lecture 12

Question 1

What is gene regulation

Answer 1

selective control by cells

Question 2

human genome size

Answer 2

3.2 billion BP’s, 20,000 genes

Question 3

fly genome size

Answer 3

122.7 million BP’s, 15,500 genes

Question 4

human genome vs fly genome

Answer 4

human genome is 30x larger but only 1.3x more genes

Question 5

human genome is mostly

Answer 5

regulatory not coding

Question 6

E. coli genome size

Answer 6

5.44 million BP’s, 5400 genes

Question 7

Metabolism is

Answer 7

catabolism and anabolism

Question 8

catabolism is

Answer 8

the breaking down of molecules into raw materials
always off, initiated by pressence of molecule

Question 9

anabolism is

Answer 9

the building of molecules from raw materials
always on, repressed by buildup of molecules

Question 10

Lac Operon is made up of

Answer 10

LacZ, LacY, LacA

Question 11

LacZ gene does what

Answer 11

encodes for ß-galatosidase which breaks down lactose into simple sugars

Question 12

LacY gene does what

Answer 12

encodes for galatosidase permeate which brings lactose into cell

Question 13

LacA gene does what

Answer 13

encodes for trans-acetylase which adds an acetyl group to lactose

Question 14

LacI does what

Answer 14

builds repressor protein which inhibits RNA pol activity

Question 15

Lac operon is an example of what

Answer 15

catabolism

Question 16

Tryptophan synthesis is what process

Answer 16

anabolism, always on and turns off by buildup of tryptophan

Question 17

what enhances the Lac Operon

Answer 17

cyclic AMP or CAMP