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qaws [65]
3 years ago
7

List three ways by which eukaryotes process mRNA after transcription.

Biology
1 answer:
lisabon 2012 [21]3 years ago
7 0

Answer:

The post transcription modification include three ways i.e., capping, polyadenylation and splicing.

1. 5' Capping- mRNA capping is catalyzed by capping enzyme which is associated with RNA polymerase II. This enzyme adds the guanosin residue to 5' end of mRNA then methyl transferase adds methyl group to N⁷ position this guanine. Capping protects mRNA from degradation by enzymes presents in the cell.

2. Polyadenylation: In polyadenylation many adenosine residue is added at 3'end of mRNA by poly(A) polymerase. This poly A tail helps in exporting mRNA out of nucleus and binding of translational factors.

3. Splicing: In splicing process the non coding introns are removed from RNA so that only coding region i.e., exons are left in mRNA. It is important to remove unwanted sequence like introns which hinders in protein formation.

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Design an imaginary food web or describe a real one. Include at least 4 living organisms that interact in your ecosystem.
PtichkaEL [24]

The trophic web is the interaction between different organisms in which there is energy transference. In the attached example, we consider plants, beetle, rabbit, frog, eagle, fox, mountainlion, and fungi.

<h3>What is the trophic web?</h3>

The trophic web is the interaction between different organisms involving transference of energy when some of them feed on the other ones.

The ones placed at lower levels pass energy to the ones at the higher levels.

Organisms at each level feed on the preceding one and become food for the next one.

• The first link corresponds to a producer organism -autotroph-.

• The following links are the consumers -heterotrophs- ⇒ herbivores and carnivores.

• The last links are the decomposers that degrade organic matter from dead organisms.

Because it is a web, all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.

Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.

Example.

To make the trophic web, first, we need to have at least four links.

So first, let us list the organisms we are working with, and then define the position of each of the organisms on the web.

  • plants,
  • beetle,
  • rabbit,
  • frog,
  • fox,
  • mountain lion,
  • eagle,
  • Fungi

<u>Producer</u> → this is the autotroph organism that takes energy from the sun or any other inorganic source → An example of this is any plant.

<u>Consumers</u> → heterotroph

⇒ Herbivores → These are the animals that feed on any part of the plants → These are the beetle and the rabbit

⇒ Carnivores → These are the animals that feed on herbivores → These are the frog, the fox, the eagle, and the mountain lion

<u>Decomposer</u> → detritivorous organisms that take energy from dead matter → Fungi

Trophic web,

  • Plants directly provide energy to the beetle and the rabbit

Plant >> Beetle and Rabbit

  • The eagle takes energy from the rabbit and the frog takes energy from the beetle.

Rabbit >> Eagle

Beetle >> Frog

  • The fox takes energy from the frog and from the rabbit

Frog and rabbit >> Fox

  • The Fox and the eagle transmit energy to the mountain lion.

Fox and Eagle >> Mountain lion

  • Fungi takes energy from dead organic matter

Plants, beetle, Rabbit, Fox, Eagle, Mountain lion >> Fungi

You will find an image in the attached files.

You can learn more about the trophic web at

brainly.com/question/8354950

#SPJ1

5 0
2 years ago
Which is a major by product of respiration? Choose the correct answer.
lana66690 [7]

Answer:

This question is incomplete as it lacks options, however, it can be answered. The answer is:

CARBON DIOXIDE (CO2)

Explanation:

Cellular respiration is the process by which glucose is broken down in an organism's cell to release energy. Although the process involves series of reactions, however, the general equation is as follows;

C6H12O6 + 6O2 ➡ 6CO2 + 6H2O + energy

Based on the above equation, the inputs are glucose and oxygen while the outputs are carbon dioxide and water. Carbon dioxide (CO2) is the major byproduct of the respiration process.

7 0
3 years ago
What is DNA and how does it replicate
Natalka [10]

Answer:

DNA is a self-replicating material

Explanation:

Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.

6 0
2 years ago
Read 2 more answers
Substances or mixtures of substances known as buffers, act in living things to resist changes in ______. multiple choice questio
TiliK225 [7]

Answer:

pH

Explanation:

Substances can act as a buffer to resist changes in pH when something more acidic or basic is added

4 0
2 years ago
The humpback whale can be seen off the coast of Alaska during the summer months, but is found as far south as California and Haw
Nookie1986 [14]

I believe the answer is The second one, They have greater access to food in northern regions during the summer.


Hope this helped :)


5 0
4 years ago
Read 2 more answers
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