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Ghella [55]
3 years ago
6

Which phrase best defines homeostasis

Biology
1 answer:
Sliva [168]3 years ago
4 0

Answer:

maintaning the essential internal parameters relatively constant is the phrase that best describes the process of homeostasis.

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imagine a cell-surface receptor protein is being newly synthesized. How can it get into the membrane that it will ultimately be
motikmotik

Answer:

the steps for a new receptor synthesis:

Explanation:

Do not forget the steps vary from an eukarityc cell to prokarityc one.  

IN AN EUKARYOTIC CELL:

1- Transcription: in the nucleus, mRNA is synthesized from the DNA sequence that codifies the protein. Exons are spliced if needed by spliceosomes.  

2- From nucleus into cytoplasm: mRNA goes through nuclear membrane into the cytoplasm were ribosomes, substrates for protein synthesis and other organelles are.

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)  

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- (The mRNA has a signal that is recognized by the rough endoplasmic reticulum) The peptide goes into this reticulum (RER) and then into Golgi apparatus. (more chemical modifications are made if needed). By this moment the protein has an inserted portion in a lipid membrane.

6- The protein is transported in a vessel that finally fusions with cytoplasmic membrane and the receptor is in destiny. Hydrophobic aminoacid sequences are inserted in membrane.

IN A PROKARYTIC CELL:

1- Transcription (no splicing is needed, there are not exons)

2- There are not nucleus and cytoplasm divided (no transport)

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- The mRNA has a signal that is guides the growing protein to cellular membrane. Hydrophobic aminoacid sequences are inserted in membrane.

8 0
3 years ago
What happened to most freedmen after the Civil War?
jasenka [17]

Answer:

D. They rented farmland from white landowners.

Explanation:

5 0
2 years ago
Read 2 more answers
Biology b adaptive
Maslowich

The substance namely water is moved through hydrologic cycle. The correct option is A.

<h3>What is hydrologic cycle?</h3>

The hydrologic cycle is the continual movement of water in the Earth-Atmosphere system.

The water cycle is defined as the movement of water from the Earth to the atmosphere and back again.

As per the question, the substance namely water is moved through hydrologic cycle.

Thus, the correct option is A.

For more details regarding hydrologic cycle, visit:

brainly.com/question/13554728

#SPJ1

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What parts of the world are deserts located???
MA_775_DIABLO [31]
Dry and arid parts of the world with little to no rain.
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An action potential enters the depths of a muscle fiber by way of __________.
Fynjy0 [20]
The answer is the T tubules. 
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