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anyanavicka [17]
3 years ago
12

How do proteins become embedded in the membrane of the endoplasmic reticulum?a. by splicing of proteins on either side of the ER

membrane.b. via stop- and start-transfer sequences that stop and start translocation of a polypeptide through the ER membrane, resulting in transmembrane proteins.c. by post-translational import can results in a transmembrane ER protein.d. by protein chaperones that insert polypeptides into the ER membrane.e. via transit sequences that target polypeptides made in the cytosol for the ER membrane.
Biology
1 answer:
alexdok [17]3 years ago
7 0

Answer:

The correct answer is b.

Explanation:

The signal peptide acts as an initiator of the  transfer. Proteins whose first destination is the endoplasmic reticulum have a signal peptide at their amino terminal end that includes a sequence composed of 5 to 10 hydrophobic amino acids, which is recognized by a receptor of this organelle that opens a channel in its membrane allowing such proteins to can get through it. Most of these proteins will then continue their course towards the Golgi apparatus, but those that also have a certain sequence of four amino acids (-Lys-Asp-Glu-Leu-COOH) at their other end (carboxyl terminal) are retained in the endoplasmic reticulum as proteins of this organelle. The transfer stop peptide anchors the protein on the membrane after the ER signal peptide (transfer initiator) is released from the translocator and removed.

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melomori [17]

Answer:

ithink it's steak

Explanation:

... because steak can be Lipid composition in meat and meat products. Meat lipids are mainly composed of triglycerides (correspond to about 95% of meat lipids) and phospholipids, which contain saturated fatty acids, monounsaturated fatty acids (MUFAs), and polyunsaturated fatty acids (PUFAs)...

and lipid is present in meat and in meat product.....

7 0
3 years ago
The outer hair cells change length in response to basilar membrane motion. What does that accomplish?
olga nikolaevna [1]

Outer hair cells change their axial dimensions in response to electrical stimulation.

What is basilar membrane motion?

Hair cell stereocilia move as a result of the basilar membrane's movement. The tectorial membrane and the hair cells, which are connected to the basilar membrane, move along with it when it moves, and the stereocilia bend in response to the relative motion of the tectorial membrane.

The hair cells that are linked to the auditory nerve fibers are stimulated by the basilar membrane's movement. While the outside hair cells actively affect the basilar membrane's vibrations, the inner hair cells convert hydromechanical vibration into action potentials.

With each sound cycle, the intracellular voltage of the outer hair cells varies, causing them to lengthen and contract. This increases the organ of Corti's vibration, enabling exceptionally high hearing sensitivity and frequency selectivity.

To learn more about tectorial membrane click on the link below:

brainly.com/question/28251599

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6 0
1 year ago
How did increasing respiratory distress impact the mental and emotional level of the person???
rewona [7]
Mental wise would go down many aspects even the thought of dieing soon and emotional impact of loved ones and worrieness.
4 0
2 years ago
Although there are 61 codons in the universal genetic code that specify amino acids, most organisms possess fewer than 45 differ
Inessa05 [86]

Answer: 4

Explanation:

The pairing of the third (3') base of the mRNA codon and the first (5') base of the tRNA anticodon are less constrained by base stacking.

4 0
3 years ago
Why would chemical weathering affect the kinds of minerals in soil as the soil is formed??
Vilka [71]
Process by which the internal structure of a mineral is altered by the addition or removal of elements. Change in phase (mineral type) and composition are due to the action of chemical agents. Chemical weathering is dependent on available surface for reaction temperature and presence of chemically active fluids.
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3 years ago
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