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nadya68 [22]
2 years ago
11

When lactose is present, the E. Coli will "turn on" the lactase gene. True False

Biology
2 answers:
larisa [96]2 years ago
7 0

Answer: true

Explanation: when high levels of lactose are present, an isomer form of lactose, allolactose , will go and bind with the depressor protein to make it inactive

Vaselesa [24]2 years ago
4 0

Answer:

true

Explanation:

lactase is the enzyme that leads to the hydrolisis of lactose, when lactose is present the e coli needs to hydrolyse it to simple sugars so it needs to active the gene for lactase synthesis

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Answer:

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Explanation:

3 0
3 years ago
Help please?
MatroZZZ [7]

1. The right answer is AC (alternative current) generators.

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2. The right answer is Repel, and attract.

The nucleus of an atom is an assembly of protons and neutrons concentrated in a very small volume and subjected to two different forces: the nuclear force and the electric force.

The electric force only acts on charged particles, attracting those which are of opposite signs and repelling those of the same sign. This "long" distance force allows the negatively charged electrons to be retained around the positively charged nucleus.


3. The right answer is electric circuit

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In the sense of circuit theory, an electrical circuit is an abstraction of material configurations, an arrangement of elements defined by mathematical relations, connected by ideal conductors.


4. The right answer is Volts and current.

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The ampere (A) is the unit of measurement of the intensity of an electric current, that is to say the flow of electrons in a conductor. André-Marie Ampère, the inventor of the electromagnet, gave his name to this unit.


5. The right answer is north pole.

The magnetic North Pole of the Earth is a unique wandering point on the surface where the Earth's magnetic field is pointing down. That is, the "dip"  is 90 °. The needle of a compass points approximately towards this place (more or less approximately according to the place where one is, exactly the compass is tangent to the line of field).


6. The right answer is perpendicular.

In a cyclotron, the magnetic field is applied perpendicularly in an empty disk-shaped chamber, which contains two D-shaped semicircular electrodes. The rectilinear portions of these electrodes face each other. The flow of electrons or ions crossing a perpendicular magnetic field is subjected to a forceperpendicular to the direction of movement.


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A solenoid is a device consisting of an electric wire wound regularly in a spiral so as to form a long coil. Running through a current, the solenoid produces a magnetic field in its vicinity, and more particularly inside the helix where this field is almost uniform.

8 0
3 years ago
Read 2 more answers
Which is the properly balanced equation that shows the synthesis of limewater, Ca(OH)2, from calcium oxide and water?
vesna_86 [32]
Again :)))))
Calcium oxide:
II    II 
Ca O   ---> CaO 
water ---> H₂O

CaO + H₂O -----> Ca(OH)₂ 
7 0
3 years ago
The addition of an amino acid to its correct t-RNA is said to involve the ‘second
podryga [215]

Answer:

The first genetic code is used to determine the nucleotide triplets that code for amino acids.

Explanation:

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8 0
2 years ago
Barnacles and mussels are filter feeders that attach themselves to rocks in the intertidal zone. A scientist observed a dense co
baherus [9]

The barnacles are only able to attach them selfs to surfaces in the water. Since the surface is limited, barnacles are attaching themselves to the other barnacles, crowding the rock. The muscles were not able to grow or attach themselves off the surface of the rock. Same thing with the mussels that are growing on the rock. So not only barnacles are crowding the rock, but Mussels as well are crowding the rock.




3 0
3 years ago
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