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
mafiozo [28]
3 years ago
9

The pl promoter is derived from

Biology
1 answer:
alexandr402 [8]3 years ago
4 0
You have to have both the pL promoter as well as a second system of the cI repressor which controls the pL promoter. 
When the cI repressor is expressed it will bind onto the operator region of the pL promoter and prevent expression. 
When the cI repressor is not expressed it can't bind to its operator and the pL promoter (which is very strong) can express whatever gene it is upstream of.
So you need to have both for transcriptional control. you don't need the rest of the phage!
You might be interested in
Vegetable that starts with the letter "i"
kenny6666 [7]
Iceberg Lettuce. It is a really crispy cabbage looking lettuce. It can be dark green or red. 
7 0
3 years ago
Read 2 more answers
Explain what asexual reproduction is and list the 5 different types that exist.
adoni [48]

Asexual Reproduction https:biologydictionary.net/asexual-reproduction/

1. Budding 
2. Binary Fission
3. vegetative propagation

The rest of answers on link

5 0
3 years ago
Explain the phases of the moon. what are the periods of rotation and revolution?
cluponka [151]

The Moon is the natural satellite of Earth. Its revolution lasts 27.322 days, while its rotation around its axis lasts 27 days. From the Earth's perspective, the Moon seems to have different phases, where it appears as fully lighted, partially lighted, or totally dark. What the Moon appears to be from the Earth depends on how the Earth, Moon, and Sun are aligned in relation to each other. If the Earth is between the Sun and the Moon, the Moon is full, with the reason being that the Sun is lighting up the side that is facing the Earth. If the Moon is between the Earth and Sun, then the Moon can not be seen, it is totally dark, and that is because the side that is facing the Earth is not lighted by the Sun at all. If the Moon is positioned sideways, not being in a straight line with the Earth and Sun, then it appears to be partially lighted, and that is the side that can be seen from Earth that is lighted by the Sun.

5 0
3 years ago
Which of the following correctly describes how the daughter cells produced during mitosis and meiosis compare to their parent ce
Leokris [45]
A, I’m pretty sure, Meiosis helps with genetic diversity
5 0
3 years ago
Read 2 more answers
Use the principles of diffusion to explain why oxygen molecules in the tissues of the lung go into the blood
Keith_Richards [23]

Answer:

Oxygen molecules in the tissues of the lung diffuse into the blood because the concentration of oxygen in the lung's tissues is more than the concentration of oxygen in the blood.

Explanation:

Diffusion is the movement of molecules from the region of higher concentration of the molecule to the region of lower concentration of the same molecule. Molecules in diffusion move <em>downward the concentration</em> <em>gradient</em> created by difference in concentration between two regions until an <em>equilibrium (equal concentration in the two regions)</em> is established.

Oxygen molecules diffuse into the tissues of the lung when an organism breathes-in during the process of breathing. The molecules in the now oxygen-rich tissues eventually start diffusing into the blood in the lung because the blood passing through the lung is always de-oxygenated or has lower oxygen concentration compared to the tissues of the lung.

Oxygenated blood moves into the heart, pumps round the body by the heart, gets depleted of oxygen and eventually find its way back to the lung where the process is repeated.

Diffusion of oxygen from the tissues of the lung into the blood will keep happening as long as oxygen keeps getting dissolved into the lung's tissues and an equilibrium is yet to be established between the tissues and the blood.

8 0
3 years ago
Other questions:
  • What would happen to the size of the carnivore population if the herbivore population increased?
    10·2 answers
  • Facilitated diffusion across a biological membrane requires ________ and moves a substance ________ its concentration gradient.
    7·1 answer
  • Write this number showing three significant figures, remember to round.<br> 566
    12·1 answer
  • Which statement about the earth’s atmosphere is true? Please help
    7·1 answer
  • What is the maximum number of amino acids in a peptide that would be produced from the following mRNA sequence: 5′ AAUCCGUAAAUGA
    5·1 answer
  • What is a cell membrane?
    14·2 answers
  • ___Ca + ___CuF2----&gt;____ CaF2 + Cu<br><br>help me solve the chemical equation ​
    7·1 answer
  • The models below represent nuclear reactions. The atoms on the left of the equal sign are present before the reaction, and the a
    6·1 answer
  • If given the template strand of DNA below, what is the complementary sequence? 5’ A T G T A T G C C A A T G C A 3’
    7·1 answer
  • What changes resulted from the scientific revolution?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!