Genetics Exam 1 - Lac Operon

0.0(0)
studied byStudied by 0 people
0.0(0)
full-widthCall with Kai
GameKnowt Play
New
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/10

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

11 Terms

1
New cards

lacZ

Gene within the lac operon that encodes Beta-galactosidase, which allows E. coli to bread the lactose disaccharide into monosaccharides to use for energy

2
New cards

lacY

Gene within the lac operon that encodes permease, which facilitates the transport of lactose into the bacterial cell

3
New cards

lacA

Gene within the lac operon that encodes transacetylase, which helps remove toxic byproducts of lactose digestion from the cell

4
New cards

lacI

the constitutively-expressed gene that encodes the repressor protein, which blocks transcription of the structural genes in the absence of lactose

5
New cards

repressor protein

Trans-acting molecule that binds to the operator region of the lac operon, inhibiting transcription until its conformation is changed by the presence of lactose

6
New cards

I-

lac mutation that prevents the production of repressor protein, causing transcription to occur regardless of the presence/absence of lactose

7
New cards

Oc

lac mutation that prevents the repressor protein from binding to the operator region, causing transcription to occur regardless of the presence/absence of lactose

8
New cards

Is

“super-repressor” lac mutation that prevents lactose from binding to and releasing the repressor molecule, inhibiting transcription even in the presence of lactose

9
New cards

CAP-cAMP complex

complex that binds to the promoter region of the lac operon and facilitates the initiation of transcription

10
New cards

CAP

The presence of glucose inhibits the activity of adenyl cyclase, causing a decline in ____ in the cell and ultimately inhibiting transcription

11
New cards

catabolite repression

Process that leads to diminished expression of the lac operon in the presence of glucose