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
Give two differences between the structure of bacterial cells and the structure of plant cells.
Serggg [28]

Answer:

The plant cell is a eukaryotic cell whereas a bacterial cell is a prokaryotic cell. ... Bacterial cells lack membrane-bound organelles, and their genome is arranged into the nucleoid. The main difference between plant cell and bacterial cell is their structure and function

3 0
3 years ago
A species of fly lives in a canyon. Some of the flies prefer the side that gets sunlight during the day, while others prefer the
Dvinal [7]

Answer:

D. habitat preference

Explanation:

Habitat preference is one of the driving forces for ecological speciation that does not allow interbreeding between the members of a species. In habitat preference, some members of a species have a different preference for habitat than the others. They live in different habitats and do not interbreed. Over generations, these two populations of a species living in different habitats develop genetic variations and interbreed with the members of their own populations only. Gradually, these two populations would develop reproductive isolation and would evolve as two different species.

8 0
3 years ago
Please Help
nignag [31]

Explanation:

why u want to know why u disturb ur mind by things which are already written in books

4 0
3 years ago
What is the MAIN function of carbohydrates?
tamaranim1 [39]
The answer is all of the above
5 0
3 years ago
What has the base Thymine?
goldfiish [28.3K]
Video: DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing. Learn the language of nucleotides as we look at the nitrogenous bases adenine, guanine, cytosine and thymine.

5 0
3 years ago
Other questions:
  • What is 32 meters/10milimeters
    12·1 answer
  • Which process produces heat to maintain a persons body temperature?
    10·1 answer
  • What is the name of the place a goat lives?<br>Think hard though one?​
    7·2 answers
  • Positive correlations have been found between ____ and health outcomes.
    11·2 answers
  • The result obtained from an experiment
    14·2 answers
  • What are the monomers of DNA called
    12·2 answers
  • Which type of stress is shown in the image?
    9·2 answers
  • A biology teacher asks his class to make models of a plant cell, an animal cell, and a bacterial cell. Aside from cytoplasm and
    15·1 answer
  • Which ocean movement do power plants use to produce unusable energy?
    6·1 answer
  • Why is the copernican revolution significant? select three options. few advancements in scientific knowledge were made. scientis
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!