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Nat2105 [25]
3 years ago
8

What gives cell membranes a flexible structure that forms a strong barrier for the cell

Biology
1 answer:
Aleonysh [2.5K]3 years ago
7 0
Cell membrane fluidity is determined by many things, including the presence of or absence of saturated and or unsaturated fatty acid tails, and because of that the ability of the phospholipids in a cell membrane to tightly pack together or not. I believe though in terms of an additional substance it would have to be cholesterol. These specific lipid molecules are inserted in between the phospholipids preventing phospholipids from tightly packing together thus allowing the cell membrane to have greater fluidity and flexibility.
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Pls help me help me pls​
Afina-wow [57]

Answer:

1. Stratus

2. Cirrus

3. Cumulus

4. Both Cumulus and Cirrus

Explanation:

6 0
2 years ago
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What happens to the amount of available energy in the pyramid as it moves up through the different levels? A) It increases. B) I
mel-nik [20]
Decreases... barely any energy is transferred to the next level and most of it is lost through heat
6 0
3 years ago
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Your muscles get sore when you sprint for 400m or across the basketball court due to
Ulleksa [173]

Answer:

Lactic acid fermentation.

Explanation:

Lactic acid fermentation is responsible for the production of lactic acid. During intense activity, there is an excess of lactic acid fermentation that leads to high lactic acid concentrations, which in high quantities is toxic and causes soreness in the muscles after intense exercise.

8 0
2 years ago
How do consumers get nitrogen?
vovangra [49]

When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use :D

8 0
2 years ago
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Gene expression from the lac operon can be controlled in many ways, including a robust negative regulation strategy Select mutat
iris [78.8K]

Answer:

Mutation that reduces the affinity of the lactose repressor for lactose.

Explanation:

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The repressor molecule regulates the expression of the Lac operon. This repressor molecule binds with the DNA sequence tightly and blocks the transcription. The mutation that results in the decrease ability or affinity for the lactose might results in the continuous expression of the gene.

Thus, the correct answer is option (d).

5 0
3 years ago
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