Consider the plasma membrane of cells. Which of the following statements true ab
ID: 163502 • Letter: C
Question
Consider the plasma membrane of cells. Which of the following statements true about plasma membranes? Plasma membranes main chemical component are phospholipids arranged in a double layer with their hydrophilic ends towards the inside of the double layer. Cholesterol in the plasma membrane decreases the flexibility of the membrane. Phospholipids are covalently bonded to one another in the plasma membrane. Unsaturation in the lipid chains increase the flexibility of of the plasma membrane. Proteins in the plasma membrane do not occupy fixed positions in the plasma membrane.Explanation / Answer
Answer: Unsaturation in the lipid chains increase the flexibility of plasma membrane
Reason:
Unsaturation in the lipid chains increase the flexibility of plasma membrane due to presence of cis double bonds and triple bonds finally make membrane with higher fluidity prevent stiffening. For example, the cell membranes of psychrophiles are likely to have higher number of unsaturated fats due to their low melting point. The presence of unsaturated fats allows the flexibility of the cell membrane. Mesophile have lower unsaturated fatty acids. For example, Mycobacterium tuberculosis causes lung infection and lives in warm- blooded animals with optimum temperature in between 20 to 30 degrees and their cell wall is consistent with lower number of unsaturated fatty acids
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.