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
sineoko [7]
3 years ago
6

Which of the following mutations could lead to constitutive expression of the genes of the lac operon? View Available Hint(s) Wh

ich of the following mutations could lead to constitutive expression of the genes of the lac operon? A mutation in the lac-Z gene A mutation in the lac-Y gene A mutation in the operator sequence A super repressor mutation Submit Part B Which of the following best describes the biological role of the lac operon? View Available Hint(s) Which of the following best describes the biological role of the lac operon? It ensures that bacterial cells produce lactose only when no other food sources are available. It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment. It ensures that a cell produces enzymes involved in lactose metabolism in a constitutive manner. It prevents other sugars from being metabolized until all available lactose has been used. Submit Part C The placement of the operator sequence between the promotor and the structural genes is critical to the proper function of the lac operon. View Available Hint(s) The placement of the operator sequence between the promotor and the structural genes is critical to the proper function of the lac operon. True False
Biology
1 answer:
Molodets [167]3 years ago
4 0

Options for part A are as follows:

A) A mutation in the operator sequence

B) A mutation in the lac-Z gene

C) A mutation in the lac-Y gene

D) A super repressor mutation

Answer:

The correct answer:

Part a - A mutation in the operator sequence

Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part C. true.

Explanation:

part a:

If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.

part b:

The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part c:

RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.

You might be interested in
What is a physical or mental representation of an object or an event
jeka94
Physical is something you can have/ hold and mental is something in ur head that you can't see or hold.

4 0
3 years ago
What does a large temperature gradient at high altitudes of the atmosphere cause?
lutik1710 [3]
D. poLAR jet streams
 

5 0
3 years ago
Differentiate between persistent and latent animal virus infections.
lana66690 [7]

Answer:

The difference between both infections is that viral infections where the virus is latent, this virus once infected is protected in the nerves of the animal organism, as for example in humans the herpes family viruses (HSV1) are housed in ganglionic terminals such as the trigeminal ganglion or the V cranial nerve, so that in a situation of immunodepression, reinfect the individual again, causing him to be unable to remove the virus from his body.

On the other hand, persistent infections diseases are the threats that persist because the microorganism cannot be eliminated, either because it is very complex, or the cure does not exist, or the correct treatment is not carried out. Furthermore, it is necessary to consider that some microorganisms mutate becoming resistant to these drugs and thus persist longer in the body until they are eliminated.

Explanation:

In short, latency refers to the fact that the individual lives with the virus for life, and persistence is that it is possible to eliminate it over a long period of time since the infectious microorganism is considered very difficult.

8 0
3 years ago
Read 2 more answers
Which of the following is not a characteristic of a eukaryotic cells?
ollegr [7]
D is false
humans are eukaryotic and we aren't small
4 0
3 years ago
xplain how the enteric nervous system supports the digestive system. What might occur that could result in the autonomic nervous
CaHeK987 [17]

Answer:

It controls gastrointestinal track.

Explanation:

The enteric nervous system supports the digestive system because enteric nervous system controls gastrointestinal track and there is no control of central nervous system (CNS) in this gastrointestinal track. Our gastrointestinal tract comprise of our mouth, esophagus, stomach, small intestine, large intestine, and anus. If abnormality occur in autonomic nervous system which result in negative impact on digestion because autonomic nervous system regulates digestion process.

7 0
3 years ago
Other questions:
  • Oxygen shows cooperative binding to hemoglobin. Cooperative binding has the following effects on the binding and release of oxyg
    14·1 answer
  • Which of the following is NOT a consequence of China's one-child policy?
    5·1 answer
  • In which phase of meiosis 1 do homologues separate?
    6·1 answer
  • Glucose is a what that is synthesized by plant cells in the what
    7·1 answer
  • Choose all of the physical changes:
    12·1 answer
  • Which of the following statements is true?
    13·1 answer
  • Light is an example of which type of energy?
    14·1 answer
  • Which of the following statements about proto-oncogenes is false? - Proto-oncogenes are normal genes with the potential to becom
    12·1 answer
  • GIVING BRAINLIEST!!!! PLS HELP!!!!!! ;-;
    15·2 answers
  • 1. Suppose that a sample of beef broth initially contains
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!