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Y_Kistochka [10]
3 years ago
7

If you observed a cell under a microscope and saw

Biology
1 answer:
spayn [35]3 years ago
8 0
Alright cool... and saw what..?
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Do oak trees produce sexually or asexually?
Elanso [62]

Uhm u should know its by pollen thats transferred by bees so asexually>

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Ill health induced by chronic stress exposure may be due in part to the prolonged secretion of what hormone? select one:
emmasim [6.3K]
The answer that best fits the description above is the hormone GLUCOCORTICOID. This was according to Hans Selye, an Austrian-Canadian endocrinologist. According to him, ill health induced by exposure of chronic stress is due to the secretion of the hormone glucocorticoid. 
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WILL GIVE BRAINLIEST!!! HELP ASAP!!!
Sauron [17]

Answer:

The last one

Explanation:

They are both found in the middle and everything else is false

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A client is admitted with systemic lupus erythematosus (sle). the laboratory report shows the presence of neutrophils and monocy
andrey2020 [161]
This is a type III hypersensitivity reaction mediated by immune complex deposits. Immune complexes are antigen-antibody (commonly IgG) complexes that are soluble and prone to deposition in multiple organs. Once immune complexes are deposited in an organ, neutrophils and macrophages will then attack the organ causing organ damage and eventually failure. Type III hypersensitivity reactions are characteristic in SLE and other autoimmune diseases such as rheumatoid arthritis, etc.

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3 years ago
You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make l
Blizzard [7]

Answer:

The options A, B, and D are all valid.

Explanation:

  • The reason is that some proteins require molecular chaperones if they are to fold properly within the environment of the cell. In the absence of chaperones, a partially folded polypeptide chain has exposed amino acids that can form non-covalent bonds with other regions of the protein itself and with other proteins, thus causing nonspecific aggregation of proteins.
  • The option A) is correct because the protein you are expressing in bacteria is being made in large  quantities, it is possible that there are not enough chaperone molecules in the  bacterium to fold the protein. Expressing the protein at lower levels might  increase the amount of properly folded protein.
  • The option B) is correct as urea should solubilize the protein and completely unfold it. Removing the urea  slowly and gradually often allows the protein to refold. Presumably, under less  crowded conditions, the protein should be able to refold into its proper  conformation.
  • The option C) is not correct as treating the aggregate with a protease, which cleaves peptide bonds, will probably  solubilize the protein by trimming it into pieces that do not interact as strongly with  one another; however, chopping up the protein will also destroy its enzymatic activity.
  • The option D) is correct because overexpressing chaperone proteins might increase the amount of properly folded protein.
  • The option E) is not correct as heating can lead to the partial denaturation and aggregation of proteins to form a solid gelatinous mass, as when cooking an egg white, and rarely helps solubilize proteins.

7 0
3 years ago
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