30 points
>
Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Biotechnology (BT)
Please answer it, explaining each option.
91. Which of the following statements are true with respect to membrane tiuidny of a phospholi bilayer? P.Increasing proportion of long chain fatty acids decreases membrane fluidity. . Increase in cholesterol content increases membrane fluidity. R. increasing proportion of cis unsaturated fatty acids increases membrane fluidity S. Increasing proportion of trans unsaturated fatty acids increases membrane fluidity (a) P and Q (d) Q and S (c) R andS (b) P andR
1 Answer(s)
Answer Now
- 2 Likes
- 1 Comments
- 0 Shares
-
![comment-profile-img]()
>
Do You Want Better RANK in Your Exam?
Start Your Preparations with Eduncle’s FREE Study Material
- Updated Syllabus, Paper Pattern & Full Exam Details
- Sample Theory of Most Important Topic
- Model Test Paper with Detailed Solutions
- Last 5 Years Question Papers & Answers
Sign Up to Download FREE Study Material Worth Rs. 500/-
Narayan singh Best Answer
Ans is .B P and R # The double bond of a cis unsaturated fatty acid provokes an unmovable bend with an angle of 30° in the acyl chain. ... Thus, unsaturated fatty acids in the cis configuration with bended steric structures (i.e. a kink in the acyl chain) result in a membrane with a relatively high fluidity. # At high temperatures, the phospholipids are further apart. In this case, cholesterol in the membrane has the opposite effect and pulls phospholipids together, increasing intermolecular forces and decreasing fluidity. # The fatty acid chains in membranes usually contain between 14 and 24 carbon atoms; they may be saturated or unsaturated. Short chain length and unsaturation enhance the fluidity of fatty acids and their derivatives by lowering the melting temperature.