Question

question 5
which two of the following will increase the fluidity of a membrane?
less cholesterol (at moderate temperatures)
more saturated phospholipids
higher temperatures
question 6
which of the following has a polar head and nonpolar tails?
carbohydrate
integral protein
phospholipid

Explanation:

For Question 5: Cholesterol at moderate temperatures restricts fluidity, so less cholesterol increases it. Higher temperatures increase the kinetic energy of membrane - components, enhancing fluidity. Saturated phospholipids pack tightly and decrease fluidity.
For Question 6: Phospholipids have a polar phosphate - containing head and non - polar fatty acid tails. Carbohydrates don't have this structure, and integral proteins have a more complex structure not characterized by a simple polar - head/non - polar tail arrangement.

Answer:

Question 5: less cholesterol (at moderate temperatures), higher temperatures
Question 6: phospholipid