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
umka21 [38]
3 years ago
9

(1 point)

Biology
1 answer:
Yakvenalex [24]3 years ago
8 0

Answer:

The correct answer is Tryptophan binds with the repressor allowing it to attach to the operator site,blocking the RNA polymerase.

Explanation:

Tryptophan operon contain 3 regulatory genes and 5 structural genes.The structural genes encodes enzymes for tryptophan biosynthesis.

  The expression of tryptophan operon is tightly regulated by the the cellular level of amino acid tryptophan.

 When the tryptophan level is high at that time the tryptophan bind with the repressor protein encoded by regulatory tryp R gene and then the repressor tryptophan complex binds to the operator region thus preventing the RNA polymerase enzyme to exert its action.

You might be interested in
What is reproduction? What are its two types
grin007 [14]

Answer:

Reproduction is when an organism mulitplies and creates descendants. The two types are sexual and asexual  

7 0
3 years ago
A researcher investigates a blood disease carried by birds she isolates an organism from the blood of an infected bird she finds
alina1380 [7]

Answer:

The organism belongs to the Protista kingdom as it is unicellular, has cell walls, and has the ability to produce spores.

7 0
3 years ago
What is the flow of molecules in passive transport?
Vilka [71]

Answer:

The movement of molecules across a membrane without the input of energy is known as passive transport. When energy (ATP) is needed, the movement is known as active transport. Active transport moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration.

Explanation:

hope this helps :D

4 0
3 years ago
Read 2 more answers
Biology students at Science High spent the day swabbing surfaces throughout the school. They ran the swabs over a culture plate
pantera1 [17]

ANSWER; C                          carol and Jose's  plate  contains streptococcus bacteria that could be potential dangerous for humans.                                                                                                                              

5 0
3 years ago
What is an example of cell theory and also a non example
Lisa [10]
Viruses are at the heart of this century-old debate. Viruses<span> are parasites that infect plants, animals, fungi and bacteria. They consist of genetic material surrounded by a protein coat and are unable to grow or reproduce without a host. The classification of viruses has confused scientists for nearly 100 years. Originally they were viewed as poisons. In fact, the word ''virus'' is Latin for ''poison.'' They have since been viewed as living creatures, then mere bio-chemical compounds, and, most recently, somewhere in between chemical compounds and lifeforms.</span>Non-cellular life<span> refers to organisms, such as viruses, that exist without any cells, and it is a very controversial topic. The cell theory, which is one of the fundamental tenets of biology, states that all living things are composed of cells and that cells are the basic units of life. So the idea that something can be considered alive without having cells is an issue that is up for debate.

</span>
5 0
3 years ago
Other questions:
  • Which of the following is not a significant threat to the world’s rainforests?
    11·2 answers
  • Researchers have noticed that some men who were sterile because their sperm cells were unable to move also had chronic infection
    6·1 answer
  • Which gas found in the Earth's atmosphere greatly impacts the daily range of temperature on Earth. A) oxygen B) hydrogen C) nitr
    15·1 answer
  • I need help, again...
    10·2 answers
  • A 60-year-old obese man was admitted to the hospital for treatment of alcoholism. He has diabetes mellitus. A liver biopsy was p
    13·1 answer
  • Which of the following is an example of osmosis? Group of answer choices The human body uses osmosis to move antibodies out of c
    14·1 answer
  • A family tree shows relationships and is, therefore, a good example of a natural system of classification. TrueFalse
    11·2 answers
  • Nature constantly adjusts the atmospheric carbon level. An increase in the level causes the atmosphere to hold more heat, which
    6·1 answer
  • Why do insect-pollinated flowers have sticky/ spiky pollen​
    13·1 answer
  • What condition is modeled by the expression 47, XXY? Explain what the<br> model shows.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!