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
Lemur [1.5K]
3 years ago
8

Under which conditions are the lac structural genes expressed most efficiently?

Biology
1 answer:
madam [21]3 years ago
4 0

Lac genes are most effectively expressed in presence of Lactose and its analogs when glucose is absent.

Explanation:

A unit of prokaryotic gene expression and regulation,which includes structural genes and regulatory sequences recognized by regulatory gene product is called operon.

<em>Lac </em>structural genes are a part of<em> Lac</em> operon. The <em>Lac </em>operon consists of three, structural genes,an operator and a promoter.The product of Lac operon is involved in the conversion of disaccharide lactose into glucose and Galactose.

Lactose and its analogs are inducers of<em> Lac </em>operon. So, the structural genes are best expressed in presence of Lactose. Glucose and galactose are repressors of lac gene so the genes are repressed in presence of glucose.

You might be interested in
Photosynthesis Puzzle #3
Radda [10]

Answer:

They all have cholorophyll

Explanation:

Or we can say they carry out photodynthesis and make food.

See, all the pictures are green, this green pigment (colour ) is cholorophyll.

The first, second and fourth are pictures of leaves [which makes food] and the third picture is a illustration of the mitochondria.

Hope it helps!

8 0
3 years ago
Read 2 more answers
What do you think an AIR QUALITY ALERT is??​
Alla [95]

Answer:

It discusses Pollution levels in the Air

Explanation: Air can be hazardous to those lungs that are weak. They have something called an Air Quality Alert to warn those with weak lungs to take precautions. Hope this helped!

6 0
3 years ago
Which therapeutic modalities can provide mechanical pain reduction by removing swelling, restoring joint motion, decreasing pres
tamaranim1 [39]

Answer:

Answer : Intermittent compression, Continuous passive motion, Cervical/lumbar traction

Explanation:

Intermittent compression can be explained as a therapeutic technique for reducing edema. Edema is when there is abnormal fluid in the tissue spaces of the body. This technique involve the use  of device known as the intermittent compression device.

Cervical or lumbar traction is the method of creating or making spaces between or among the vertebrae in order to make the spinal discs alright or healthy. In the case of cervical traction, it causes light stretching of the neck.

The continuous passive motion involves the use of machines to repair or rehabilitate limbs , either in the arm or leg.

6 0
3 years ago
Prey are dependent on their predators for food true or false
Citrus2011 [14]

Answer:

True

Explanation:

Prey depend on the predators to take out competition

8 0
3 years ago
Read 2 more answers
Imagine that a newly discovered, recessively inherited disease is expressed only in individuals with type O blood, although the
kirill [66]

Answer:

.

Explanation:

.

4 0
3 years ago
Other questions:
  • True or false, the fact that the mountains separate continents appeared to belong to the same chain of mountains was evidence th
    8·2 answers
  • Which plant has a visible leaf modification that will help it conserve water in extremely dry environments?
    9·2 answers
  • Which of the following method of reproduction is common to paramecium and amoeba? (A) conjugation (B) sexual reproduction (C) bi
    6·2 answers
  • The nervous system isn’t only
    11·1 answer
  • Protein molecule are long, usually folded chains made from 20 different kinds of amino-acid molecules. Amino acid molecules are
    6·1 answer
  • If you irradiated a sick mouse and transplanted in bone marrow from the wild type mouse would you expect this chimeric mouse to
    6·1 answer
  • During an experiment, India examines prepared slides that her teacher has given her. One of the slides shows a single-celled org
    5·2 answers
  • Photosynthesis is a process by which plants turn energy from sun into 1.___ or 2.___
    13·1 answer
  • Choose a mammal in each group, monotreme, placental mammal, and marsupials. Write a paragraph description of each mammal and inc
    10·1 answer
  • Nick is conducting a controlled experiment to test whether music helps daisies grow faster. Below are the steps to Nick's experi
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!