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valina [46]
4 years ago
14

In an experiment, you create two groups of liposomes in a solution containing 0.1 M NaCl—one made from red blood cell membranes

and the other from frog egg cell membranes. When the liposomes are placed in water, those with red blood
cell membranes burst more rapidly than those made from egg membranes. Evaluate each of the following statements and identify those that could explain these results.

• T/F The red blood cell liposomes are more hypertonic relative to water than the frog egg liposomes.
• T/F The red blood cell liposomes are more hypotonic relative to water than the frog egg liposomes.
• T/F The red blood cell liposomes contain more aquaporins than the frog egg liposomes.
• T/F The frog egg liposomes contain ion channels, which are not present in the red blood cell liposomes.
Biology
1 answer:
mars1129 [50]4 years ago
8 0

Answer:

As liposomes with red blood cell membranes burst more rapidly than those made from egg membranes, we consider these liposomes as more hypertonic respect to water, than those derived from frog egg cells.

Explanation:

Osmosis is a process where water can cross a semipermeable membrane in a gradient way.  Water tends to move from a high concentration of solvent to a low concentration.  Then, water goes in through the liposome to dilute its solute content, as it's not easy for molecules inside to go out of the usually impermeable membrane bilayers.   

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Oh, no... you dropped your study flashcards, and now they're out of order! Put them back into the correct order for a eukaryotic
Vladimir79 [104]

The given question is incomplete, the complete question is:

Oh, no... you dropped your study flashcards, and now they're out of order! Put them back into the correct order for a eukaryotic cell.

a.  "Combine the mRNA strand with a ribosome and a tRNA carrying a methionine."

b. "Unwind the DNA molecule near the promoter."

c. "Exit the nucleus to the cytoplasm."

d. "Transcribe the complementary RNA strand."

[Tip: you might want to work out the correct order on a piece of scratch paper before selecting from the options below.]

c - d - b - a

b - d - c - a

c - b - d - a

d - b - c - a

b - d - a - c

Answer:

The correct order would be b, d, c, a.

Explanation:

First unwinding of the molecule of DNA takes place close to the promoter. After that transcription of the complementary RNA strand takes place, then mRNA moves out of the nucleus into the cytoplasm. Ultimately, the combination of ribosome and tRNA carrying a methionine takes place with the mRNA.  

The order is based upon the central dogma of the cell. Based on the central dogma concept, the transcription of the mRNA takes place in the first place, which then gets transported out of the nucleus into the cytoplasm in the eukaryotic cell. The unwinding of DNA takes place close to the sequence of the promoter for the process of transcription.  

In the promoter region, various transcription factors are present and binding of RNA polymerase takes place with the template strand. The generated mRNA then get transported out of the nucleus into the cytoplasm. Post transcription, translation of mRNA takes place with the assistance of tRNA and ribosome. In the mRNA, the start codon generally codes for methionine because of which the tRNA that carries methionine identifies the start codon, and the process of translation gets initiated.  

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