test 3 lecture 14

Question 1

what are regulatory proteins

Answer 1

help a cell sense internal changes and alter its gene expression to respond to conditions by binding to ligands

Question 2

catabolism

Answer 2

the degradation of an organic food source

Question 3

what forms the lac operon

Answer 3

lac z, y, a

Question 4

function of lacz

Answer 4

claves lactose to produce glucose and galactose

Question 5

function of lacy

Answer 5

transmembrane symporter

Question 6

function of lacA

Answer 6

transfers an acetyl group from acetyl-CoA to beta-galactosides
still dont know role

Question 7

catabolite repression

Answer 7

an operon enabling catabolism of one nutrient is repressed by the presence of a more favorable catabolite

Question 8

diauxic growth

Answer 8

the biphasic curve of a culture growing on two carbon sources

Question 9

regulon

Answer 9

set of genes scattered around the chromosomes that have related functions