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Oksi-84 [34.3K]
3 years ago
13

Prior to its export from the nucleus, what modifications must be made to a mRNA molecule in eukaryotic cells?

Biology
1 answer:
mamaluj [8]3 years ago
8 0

Answer: Option A

Explanation:

Before the mRNA which has been processed from DNA is taken and transported to the ribosomes in the cytoplasm for the translation process, some modifications are made to the mRNA before transport. This includes

1. Capping: addition of 5'-5' phosphate bonds to the 5' terminus of the mRNA. Forms the cap structure that is essentials for binding to ribosomes via special proteins attached to the cap structure

2. Addition of poly(A) tail: a poly(A) addition signal (AAUAAA) is attached to the 3' terminus of the mRNA. They are important in translation initiation and degradation prevention

3. Splicing: this is likely the most remarkable processing in eukaryotes. It involves the removal of intron regions by excision from the present-mRNA and then ligating the exon regions together giving rise to the mRNA.

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Eukaryotes have a second membrane to protect what important structure
Alexus [3.1K]

Answer:

Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes. However, unlike prokaryotic cells, eukaryotic cells have: a membrane-bound nucleus. numerous membrane-bound organelles (including the endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria)

Explanation:

4 0
3 years ago
Which statement best represents how structure relates to function?
Brut [27]

The statement that best represents how structure relates to function is as follows: a deer's horizontal pupils help it scan the horizon for predators (option C).

<h3>What is structure in biology?</h3>

A structure, according to biology, is an arrangement or organization of parts to form an organ, system, or living thing.

The structures found in living organisms are usually function-specific. Examples of common structures in living organisms and their respective functions are as follows:

  • Radula in snails - feeding
  • Eyespot in Euglena- light sensing
  • Claws in carnivores- for holding prey

Therefore, the statement that best represents how structure relates to function is as follows: a deer's horizontal pupils (structure) help it scan the horizon for predators (function).

Learn more about structure and function at: brainly.com/question/14419215

#SPJ1

4 0
2 years ago
Can the type of light make a difference in photosynthesis?
GarryVolchara [31]

Answer:

yes

Explanation:

the light that a plant needs to be able to grow, has to be specific with its uv among other things

3 0
3 years ago
Como se forman las perlas
Kobotan [32]
Hay tees métodos pot los cuales se forma las perlas: naturalmente, culturas, o imitación. En la naturaleza, in irritante como un pará o un grand de arena de abre paso entre el manto y la cáscara de in mejillón, una almeja o una ostra. Leugo, como mecanismo de defensa, la criatura marina comienza a secretar una mucosa com minerales conocidos como nácar, el mismo material del que están hechas las conchas. Con el tiempo, la capa de nácar de acumula y después de varios años, las perlas de agua salada tardan más en formarse, una perla está completamente formada. En el método de cultivo, un irritante se implanta quirúrgicamente en la criatura, esto se conoce como el núcleo, la semilla o “madre de perla”. A partir de ahí sufre el mismo proceso que en la naturaleza. No creo que estuvieras preguntando sobre el proceso para hacer perlas de imitación. No hablo Español, así que esto ha sido traducido por el traductor de google si ay algún problema de traducción. Espero que esto ayude.
5 0
3 years ago
ONLY DO NUMBER 5 I CAN DO THE REST....If you help i will pass you the brainliest
Mama L [17]

Answer: You can compare Desert and rainforest

Explanation:

They are two very different ecosystems so it won;t be hard to compare them.

7 0
3 years ago
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