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
meriva
3 years ago
11

Which one of the following accurately describes the Lac operon?

Biology
2 answers:
Zepler [3.9K]3 years ago
8 0
D. The repressor is freed from the operator when lactose is present.
Think of a bacteria that comes into contact with some lactose sugar in milk. Normally it's not in milk, so the gene is repressed (prevented) from making the lac enzyme (which digests lactose). Now when it comes across some milk, it wants to make as much lac as possible to eat up all the lactose.
FYI: trp for tryptophan works the exact opposite with repressor blocking when trp IS PRESENT.
Butoxors [25]3 years ago
8 0
D is the answer other ones are incorrect
You might be interested in
Which of the following is a step that occurs within an inflammatory response?
Citrus2011 [14]

The right answer is C.

During inflammation, under the influence of chemical mediators, endothelial cells (forming the blood vessels) become activated. This leads to local arteriolar vasodilation then capillary2 which causes:

** an increase in blood supply

** a decrease in the speed of blood flow

This local swelling of the blood vessels causes redness and the sensation of heat. It aims to increase the flow of blood to evacuate dead cells and toxins (detox) and provide the elements necessary for healing, including white blood cells to fight against foreign bodies.

8 0
3 years ago
What is cell division?
frozen [14]

Answer:

cell division is the process by which a living cell proliferates from one cell to two cells.

I hope this helps

7 0
3 years ago
Read 2 more answers
Which property<br>(a) determines the suitability of aluminium for making aircraft body?​
klio [65]

Answer:

Corrosion Resistance

Explanation:

aluminum's high resistance to corrosion ensures the safety of the aircraft and its passengers.

4 0
3 years ago
Cancer is a disease that is caused by genetic mutations.Which health professionals are least likely to face risk factors in thei
Lena [83]
<span>Rubber manufacturing

</span>
7 0
3 years ago
Read 2 more answers
According to the theory of endosymbiosis How did cells acquirenhow did cells acquire chloroplast
stira [4]

According to endosymbiotic theory, the chloroplast evolved as a result of engulfment and assimilation of a Cyanobacteria by an eukaryotic cell.

Explanation:

  • Endosymbiotic theory supports the view that ceratain organelles of the eukaryotic cell evolved as a result of engulfment of single celled organism.
  • Evidences  that support this theory is the presence of organellar DNA.
  • It is assumed that Mitochondria evolved as a result of engulfment and assimilation of an aerobic prokaryote while Chloroplast evolved due to engulfment and assimilation of a photosythetic prokaryote by an Eukaryote.
  • After the engulfment ,these organisms however escaped the phagocytosis and began to benefit the eukaryotic Host.
  • Soon it lost many of its Genes to the eukaryotic nucleus and became dependent on the Host.
  • Thus a symbiotic association was established between the prokaryote and the host.Giving rise to cell organelles.
7 0
3 years ago
Other questions:
  • Sequence of m-rna that is not involved in coding for a protein which is cut out before it is read by the ribosomes
    10·1 answer
  • Who is charles darwin and his theory of natural selection
    13·1 answer
  • Why cant any living organism suvive on the martain surface?
    13·1 answer
  • Sweetened beverages supply nearly half of all the added sugars consumed by americans. true or false
    8·1 answer
  • The scientific name of a plant includes the
    8·1 answer
  • What factors affect water quality?
    8·1 answer
  • PAL: Cadaver &gt; Muscular System: Upper Limb &gt; Lab Practical &gt; Question 4
    13·1 answer
  • In the interview with CHLOE ESTEROL, O2 says that if glucose can't enter The Cell, then cellular respiration would be affected.
    6·1 answer
  • If a man has genotype BbHh and a woman has genotype Bbhh, then what is the probability that their child will have beeturia
    7·1 answer
  • Who discovered the advantages of AC over DC( alternating current and direct current)?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!