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otez555 [7]
1 year ago
6

Briefly describe two ways that a cytosolic protein (fully translated) can be targeted to the cytoplasmic face of the plasma memb

rane.
Biology
1 answer:
Bogdan [553]1 year ago
8 0

Through secretory pathway or cytosolic protein through cytosolic pathway.

The cytosol consists mostly of water, dissolved ions, small molecules, and large water-soluble molecules (such as proteins). The majority of these non-protein molecules have a molecular mass of less than 300 Da. Membrane proteins are inserted into the endoplasmic reticulum (ER) by two highly conserved parallel pathways. The well-studied co-translational pathway uses signal recognition particle (SRP) and its receptor for targeting and the SEC61 translocation for membrane integration.

However, mRNAs that encode cytosolic proteins can also be translated by ER-bound ribosomes. Thus, a large fraction of the proteome can be translated by ER-associated ribosomes. Such a diverse and selective translation of mRNAs redefines this ubiquitous organelle as a primary site of proteome synthesis in the cell.

To learn more about cytosolic protein , here

brainly.com/question/16191638

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Answer: Traits that are controlled by multiple genes

Explanation: Polygenic traits are traits that are controlled by more than one gene. A trait that is influenced by only one gene is called a monogenic trait but when a trait is controlled by two or more genes, it is called a polygenic trait. The manifestation of these traits involves interaction of multiple genes. Polygenic traits do not obey Mendel's inheritance pattern. Examples of polygenic traits are skin colour, eye colour and hair colour.

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AnnZ [28]

Answer:

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Which of the following statements is not true about mRNA?
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The correct answer is d. eukaryotes almost always produce polycistronic mRNA

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mRNA can be polycistronic or monocistronic. A monocistronic mRNA contains the information of one gene only so a monocistronic mRNA code only one protein at a time but a polycistronic mRNA can code for multiple proteins at a time.

In eukaryotes, one transcriptional unit carries the information of only one protein so eukaryotes produce monocistronic mRNA but some eukaryotes are capable of having polycistronic mRNA.

In prokaryotes, many genes are transcribed as a unit to produce multiple proteins so prokaryotes produce polycistronic mRNA. Therefore the statement which is not true is d. eukaryotes almost always produce polycistronic mRNA.

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