As exam question

I would have put that it' because Cholesterol is only slightly soluble in water so therefore only a small amount of it will dissolve in the blood, this is because it can only form one hydrogen bond which will be disrupted by the fact that Cholesterol is a large molecule. In comparison Glucose is water soluble and a lot of glucose can dissolve in the blood because it is a more compact molecule and can form more hydrogen bonds. Therefore in order for enough Cholesterol to dissolve to be carried in the blood its water solubility needs to be increased, here by binding it to a carrier protein.

Hope this helps.

You're very smart thank you very much!