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Ipatiy [6.2K]
3 years ago
12

After transcription begins, several steps must be completed before the fully processed mRNA is ready to be used as a template fo

r protein synthesis on the ribosomes.
Which three statements correctly describe the processing that takes place before a mature mRNA exits the nucleus?
a. Noncoding sequences called introns are spliced out by molecular complexes called spliceosomes.
b. A cap consisting of a modified guanine nucleotide is added to the 5' end of the pre-mRNA.
c. Coding sequences called exons are spliced out by ribosomes.
d. A translation stop codon is added at the 3' end of the pre-mRNA.
e. A poly-A tail (50-250 adenine nucleotides) is added to the 3' end of the pre-mRNA.
Biology
1 answer:
snow_lady [41]3 years ago
5 0

Answer:

B

Explanation:

This may be rong, however I think this needs to happen before the mRNA can leave the nucleus. The cap helps prevent the mRNA from being destroyed by the cell itself once it leaves the nucleus.

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Which statement best compares the moon and Earth? Group of answer choices
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Answer:

To be honest, it's optional so hope these answers will work for ya!

Explanation:

*Earth has atmosphere and life while the moon doesn't

*Earth has weather and seasonal changes

*Moon has satellite's that we set up and use

*Types of erosion:

Earth: wind, water, ice, and heat

Moon: impact

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8 0
2 years ago
What is a genotype in simple terms?
hodyreva [135]

Answer:

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4 0
3 years ago
The greenhouse effect plays a major role in the climate of a planet. Visit the Greenhouse Effect AstroTour, and use what you lea
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B. If there were no greenhouse effect, liquid water would not exist on the surface of the Earth

D. The Earth has reached thermal equilibrium, emitting the same amount of energy into space as it absorbs from the Sun.

E. The more carbon dioxide there is in an atmosphere, the stronger the greenhouse effect will be

Explanation:

The greenhouse effect plays major role in the climate of our planet in diverse ways:

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  • it allows the earth to reach an equilibrium with space in exchange of thermal energy.
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The greenhouse effects results from the abundance of greenhouse gases in the atmosphere. These gases are able to prevent long wave solar radiation from leaving the surface of the earth. When the gases interacts with the radiation, it produces heat that warms the earth surface. Examples of these gases are carbon dioxide, methane, water vapor e.t.c.

The warming of the surface helps to free freshwater trapped as ice and keeps it in the liquid form throughout.

In this exchange of energy, there is a balance between the amount of heat absorbed and radiated back into the atmosphere. As energy enters the earth, it is also radiated out into space. This helps to keep the earth temperature in balance.

Learn more:

Greenhouse emission brainly.com/question/4580761

#learnwithBrainly

7 0
3 years ago
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