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schepotkina [342]
2 years ago
14

Classify each RNA post-transcription processing event according to whether it occurs in prokaryotes or eukaryotes.

Biology
1 answer:
tigry1 [53]2 years ago
7 0

'RNA is transcribed and translated in the cytoplasm', 'transcription produces an mRNA ready for translation' and 'RNA is proofread for errors' occur in prokaryotes, whereas '5′ cap, 3' poly-(A) tail and RNA splicing' occur in eukaryotes.

The prokaryotic cells (e.g., bacterial cells) do not contain cell nuclei, thereby the messenger RNA (mRNA) must be transcribed and translated in the cytoplasm.

During prokaryotic transcription, the RNA transcript is proofread for errors. In bacteria, DNA polymerases proofread the transcript by using their 3’ → 5’ exonuclease activity.

In eukaryotic cells, RNA processing consists of several mechanisms:

  • A 7-methylguanosine cap (5′ cap) is added to the 5′ end of the precursor messenger RNA (pre-mRNA).

  • A 3' poly-Adenine (A) tail is added to the 3' end of the pre-mRNA.

  • Both the 5′ cap and 3' poly-(A) tail protect the RNA transcript from its degradation by exonucleases.

  • Eukaryotic RNA splicing consists of the removal of non-coding regions called 'introns' and subsequent splicing of the protein-coding regions called 'exons'.

Learn more in:

brainly.com/question/24415778

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Complete each statement by using the appropriate word or phrase from the list. Then place the statements in the order of an acti
timurjin [86]

Answer:

1. Potassium

2. increasing towards zero

3. hyperpolarization

4. voltage-regulated Potassium

Explanation:

Membrane potential can be defined as the difference in electric charges inside and outside of a cell. The resting membrane potential (RMP) occurs when there is no net current across the membrane and therefore the cell is in a non-excited state. At the RMP, sodium ions (Na+) are more concentrated inside the extracellular fluid (ECF) than inside the intracellular fluid (ICF), while potassium ions (K+)  are more concentrated inside the ICF. The diffusion of K+ outside the cell triggers its hyperpolarization, by becoming the membrane potential more negative compared to the resting potential. As the potential nears +35 mV, the voltage-regulated potassium channels are open, thereby K+ ions leave the cell down its concentration gradient, while voltage-gated Na+ channels become saturated and inactivate.

8 0
3 years ago
How can changing conditions, such as the introduction of disease impact the numbers and types of organisms in an ecosystem? Prod
wolverine [178]

Answer:

decrease

Explanation:

if the producer is destroyed then all the others are dead

5 0
2 years ago
Was the bag that gained the most weight hypertonic hypotonic or isotonic
pychu [463]
Definitely hypotonic. isotonic wouldn't change weight and hypertonic would lose weight.
4 0
3 years ago
You have to choose between playing a team sport and taking music lessons because the practices overlap. what economic concept do
trapecia [35]

Time is scare is the economic concept this dilemma demonstrate.

<h3>Why Time is scare?</h3>

The time is scare because there is an over lap between the team sport or doing the music instruction. This demonstrates that there is not enough time to meet demand.

Two of the tasks require more time than is available. Both team sports and music courses cannot be played because of the lack of time.

Although there is a strong need for time, two things cannot happen at once. The need for time is great, but there is nothing one can do about it; she must choose between the two options presented.

To learn more about Time is scare visit:

brainly.com/question/16246314

#SPJ4

7 0
2 years ago
The graph below shows how the numbers of two different organisms in a forest changed over time. The changes in population sizes
nadya68 [22]

Answer:

its d dude

Explanation:

5 0
3 years ago
Read 2 more answers
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