1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hjlf
3 years ago
14

The expression of the lac structural genes is _______ when lactose is absent from the culture medium and is _______ when lactose

is added, because lactose binds to the lac _______ and inactivates it.
Biology
1 answer:
puteri [66]3 years ago
7 0

Answer:

The expression of the lac structural genes is LOW when lactose is absent from the culture medium and is HIGH when lactose is added, because lactose binds to the lac REPRESSOR and inactivates it.

Explanation:

Lac operon is expressed only when lactose sugar is available to the bacteria. When lactose is not present, the repressor protein binds to the operator sequence and does not allow RNA polymerase to transcribe the genes. Therefore, the expression of the lac operon is prevented in the absence of lactose. The presence of lactose allows its expression. Under these conditions, allolactose binds to the repressor protein rendering it not able to bind to the operator sequence.

You might be interested in
!!will mark brainliest!!
docker41 [41]

Answer:

If the father has hemophilia and the mother DOESN'T the daughters any will have and the sons won't.  If the moms have it and the dad doesn't that means all of the sons will have it and the daughters won't

Explanation:

Mark as Brainliest

5 0
3 years ago
Read 2 more answers
How does pain relievers work
kozerog [31]

When you take a pain reliever like ibuprofen, it keeps injured or damaged cells from making and releasing prostaglandin. When the cells don't release this chemical, it means that the brain won't get the pain message as quickly or clearly.

8 0
3 years ago
Read 2 more answers
A particular environment has enough food to support 50 rats through the winter. At the end of winter one year, there are 25 fema
koban [17]

it will keep on growing until food runs out and then they start die ing from starvation

7 0
4 years ago
Read 2 more answers
Where do ribosomes get the instructions for making protein?
bagirrra123 [75]
Ribosomes get the instructions for making proteins from rna that is in the cells structure
8 0
3 years ago
9
kakasveta [241]
If I remember them correctly, the organisms are a fish, a reptile a bird and a human during embryonic development. B & D are the correct answers.
3 0
3 years ago
Other questions:
  • What is hybrid inviability?<br><br>What is hybrid infertility?
    7·1 answer
  • What is the difference between a contact force and a non-contact force? ​
    12·1 answer
  • Hemophilia is a disease that causes uncontrollable bleeding. The father has it all of his daughters will be carriers of the dise
    9·2 answers
  • This biome is also called boreal forest, vegetation is composed primarily 1 point
    9·1 answer
  • Which statement correctly describes how the nervous system interacts with the digestive system? A The nervous system extracts nu
    11·1 answer
  • The temporary release of serotonin has been found to ____ memory formation, and the temporary release of stress hormones has bee
    8·1 answer
  • Describe 2 ways that plants respond to their environment , giving an example of each. Your answer can include ways that plants r
    8·1 answer
  • Hamster Hamster Hamster
    15·2 answers
  • Gnetophyta is considered as a linkage between gymnosperms and
    14·1 answer
  • What class does kingdom protoctista belong to?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!