Question

question
which of the following is a characteristic of ldl, a cholesterol transporter? select all that apply.
select all that apply:
an ldl tends to have more protein than an hdl.
it is a low - density lipoprotein involved in transporting cholesterol from the liver to the tissues.
it is a lipoprotein that removes excess cholesterol from the tissues and carries it to the liver.
it is spherical in shape, with an inner core of nonpolar lipids and a polar surface made up of the head of phospholipid molecules.

Explanation:

• For the first option: HDL (high - density lipoprotein) has more protein than LDL (low - density lipoprotein). So, the statement “An LDL tends to have more protein than an HDL” is incorrect.
• For the second option: LDL is a low - density lipoprotein. Its main function is to transport cholesterol from the liver (where it is synthesized or taken up from the blood) to the peripheral tissues. This statement is correct.
• For the third option: The lipoprotein that removes excess cholesterol from the tissues and carries it to the liver is HDL (reverse cholesterol transport). So, this statement is incorrect for LDL.
• For the fourth option: Lipoproteins, including LDL, are spherical in shape. They have an inner core of non - polar lipids (such as cholesterol esters and triglycerides) and a polar surface made up of the head of phospholipid molecules (along with some proteins). This statement is correct.

Answer:

• B. It is a low - density lipoprotein involved in transporting cholesterol from the liver to the tissues.
• D. It is spherical in shape, with an inner core of nonpolar lipids and a polar surface made up of the head of phospholipid molecules.