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Ierofanga [76]
2 years ago
10

An operon encodes enzymes for making an essential amino acid and is regulated like the trp operon. Which of the statements is tr

ue?
A.) the amino acid inactivates the repressor
B.) the amino acid acts as a corepressor
C.) inducible enzymes are produced
D.) the repressor is active in the absence of the amino acid
Biology
1 answer:
xxTIMURxx [149]2 years ago
7 0
"The <span>amino acid acts as a corepressor" is the statement among the choices given in the question that is true. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.

</span>
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Where are the different levels of the atmosphere located?
ArbitrLikvidat [17]

Troposphere

The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region.

Stratosphere

The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high. The ozone layer, which absorbs and scatters the solar ultraviolet radiation, is in this layer.

Mesosphere

The mesosphere starts just above the stratosphere and extends to 85 kilometers (53 miles) high. Meteors burn up in this layer

Thermosphere

The thermosphere starts just above the mesosphere and extends to 600 kilometers (372 miles) high. Aurora and satellites occur in this layer.

Ionosphere

The ionosphere is an abundant layer of electrons and ionized atoms and molecules that stretches from about 48 kilometers (30 miles) above the surface to the edge of space at about 965 km (600 mi), overlapping into the mesosphere and thermosphere. This dynamic region grows and shrinks based on solar conditions and divides further into the sub-regions: D, E and F; based on what wavelength of solar radiation is absorbed. The ionosphere is a critical link in the chain of Sun-Earth interactions. This region is what makes radio communications possible.

Exosphere

This is the upper limit of our atmosphere. It extends from the top of the thermosphere up to 10,000 km (6,200 mi).

3 0
3 years ago
How are convection current in the mantle and in the oceans similar? How are they different?
Vanyuwa [196]

Hello,


Convection currents in the mantle and in the ocean are similar because they both are responsible for the shaping the Earth's surface. Two forces are behind the movement of Earth's huge land masses. Those forces are convection and gravity.


Convection describes the movement of gasses or liquids due to different temperatures. The convection currents just beneath Earth's crust flow very slowly, causing movement in the plates above them. These currents are different with the fact that they produce different plate movements. Ridge push occurs from the convection currents in the ocean. These occur at mid-ocean ridges, which are elevated higher than the rest of the ocean floor. In contrary, convection causes material in the mantle to flow. Due to combined action of convection currents and gravity, Earth's plates are in constant motion.



Faith xoxo


8 0
3 years ago
What are the adaptations of bottle-nosed dolphins that allows them to thrive in the marine biome?.
3241004551 [841]

Answer:

Thermoregulation

Explanation:

  1. Decreased surface-to-volume ratio. The dolphin's fusiform body shape and reduced limb size decrease the amount of surface area exposed to the external environment.
  2. Increased insulation. Dolphins deposit most of their body fat into a thick layer of blubber.
  3. Heat exchange system.

5 0
2 years ago
What must be true about the number of chromosomes in each sex cell (when compared to the number of chromosomes in body cells
Mamont248 [21]

Answer:

The number of chromosomes in sex cell must be haploid (1n) as compared to body cell which is diploid(2n).

Explanation:

Body cells are diploid while the sex cells are haploid. We can say that sex cells contain half number of chromosomes as compared to body cells.

6 0
2 years ago
PLEASE ANSWER ASAP <br><br> What do you notice about the anti parallel strands?
DanielleElmas [232]

Answer:

Antiparallel: A term applied to two molecules that are side by side but run in opposite directions. The two strands of DNA are antiparallel. The head of one strand is always laid against the tail of the other strand of DNA

8 0
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