LDL (low-density lipoprotein) contains

a. protein, triglyceride, phospholipids and cholesterol
b. phospholipids and cholesterol
c. protein and cholesterol
d. protein and triglycerides

The correct answer is " a"

LDL contain protein,triglycerides,phospholipid and cholesterol.

Explanation:

Low density lipoprotein,or LDL,are complex aggregates of lipids and protein.Their function is to transport lipids (fats) around the body,in the bloodstream,and to the cells where its required.Apart from this,it also carries triglycerides,phospholipids and fat soluble vitamins.

Lipoprotein is composed of a hydrophobic core that is made up of polyunsaturated fatty acids and cholesterol molecules,along with a lipid membrane that contains protein called apolipoproteins.

There are 4 major classes of lipoprotein:

•chylomicrons

•very low density lipoprotein(VLDL)

•high density lipoprotein (HDL)

•low density lipoprotein(LDL)

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.