What is cholesterol biochemistry?

Asked By: Sofian Zhadaev | Last Updated: 18th April, 2020
Category: healthy living nutrition
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Cholesterol is a lipid with a unique structure consisting of four linked hydrocarbon rings forming the bulky steroid structure. Cholesterol is present in most animal membranes with varying amounts but is absent in prokaryotes and intracellular membranes.

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Likewise, what is cholesterol in simple terms?

Cholesterol (say: kuh-LES-tuh-rawl) is a type of fat found in your blood. Your liver makes cholesterol for your body. Meat, fish, eggs, butter, cheese, and milk all have cholesterol in them. Fruits, vegetables, and grains (like oatmeal) don't have any cholesterol.

Furthermore, what is the biological significance of cholesterol? Cholesterol is an extremely important biological molecule that has roles in membrane structure as well as being a precursor for the synthesis of the steroid hormones, the bile acids, and vitamin D. Both dietary cholesterol, and that synthesized de novo, are transported through the circulation in lipoprotein particles.

Additionally, what are the characteristics of cholesterol?

Cholesterol. Cholesterol, a waxy substance that is present in blood plasma and in all animal tissues. Chemically, cholesterol is an organic compound belonging to the steroid family; its molecular formula is C27H46O. In its pure state it is a white, crystalline substance that is odourless and tasteless.

What is the chemical composition of cholesterol?


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What are the 2 types of cholesterol?

There are two major forms of cholesterol: Low-density lipoprotein or LDL, also known as "bad" cholesterol, and high-density lipoprotein or HDL, also called "good" cholesterol. LDL is the main source of artery-clogging plaque. HDL, on the other hand, works to clear cholesterol from your blood.

What are the worst foods for high cholesterol?

They suggest limiting the following foods to achieve this:
  • fatty beef.
  • lamb.
  • pork.
  • poultry with skin.
  • lard and shortening.
  • dairy products made from whole or reduced-fat milk.
  • saturated vegetable oils, such as coconut oil, palm oil, and palm kernel oil.

What should you avoid if you have high cholesterol?

Here are 4 high-cholesterol foods that can negatively impact your health.
  • Fried Foods. Fried foods — such as deep-fried meats and cheese sticks — are high-cholesterol and should be avoided whenever possible.
  • Fast Food.
  • Processed Meats.
  • Desserts.

What is the normal cholesterol level?

Cholesterol levels for adults
Total cholesterol levels less than 200 milligrams per deciliter (mg/dL) are considered desirable for adults. A reading between 200 and 239 mg/dL is considered borderline high and a reading of 240 mg/dL and above is considered high. LDL cholesterol levels should be less than 100 mg/dL.

What are the different types of cholesterol?

Cholesterol: The good and the bad
Two types of lipoproteins carry cholesterol to and from cells. One is low-density lipoprotein, or LDL. The other is high-density lipoprotein, or HDL. The amount of each type of cholesterol in your blood can be measured by a blood test.

What foods cause high cholesterol?

Foods high in (unhealthy) saturated fats include:
  • fatty cuts of meat.
  • full fat dairy products such as milk, cream, cheese and yoghurt.
  • deep fried fast foods.
  • processed foods such as biscuits and pastries.
  • takeaway foods such as hamburgers and pizza.
  • coconut oil.
  • butter.

Why is it important to check your cholesterol?

As the amount of cholesterol in your blood increases, so does the risk to your health. That's why it's important to have your cholesterol tested, so you can know your levels. If a blood clot forms and blocks one of these narrowed arteries, a heart attack or stroke can result.

What vitamins can raise your cholesterol?

Niacin, a B vitamin, has long been used to increase high-density lipoprotein (HDL) cholesterol — the "good" cholesterol that helps remove low-density lipoprotein (LDL), the "bad" cholesterol from your bloodstream.

What are three vital roles of cholesterol in the body?

In our bodies, cholesterol serves three main purposes: It aids in the production of sex hormones. It's a building block for human tissues. It assists in bile production in the liver.

How does the body dispose of cholesterol?

High-density lipoprotein (HDL) helps to get rid of excess cholesterol by carrying it from your tissues to your liver. Your liver then breaks down the cholesterol so your body can get rid of it. HDL helps to reduce your risk of heart disease and stroke so is often referred to as 'good' cholesterol.

What are benefits of cholesterol?

Cholesterol is important
  • build the structure of cell membranes.
  • make hormones like oestrogen, testosterone and adrenal hormones.
  • help your metabolism work efficiently, for example, cholesterol is essential for your body to produce vitamin D.
  • produce bile acids, which help the body digest fat and absorb important nutrients.

What are the functional groups of cholesterol?

There is a hydrocarbon tail linked to one end of the steroid and a hydroxyl group linked to the other end. The hydroxyl group is able to form hydrogen bonds with nearby carbonyl oxygen of phospholipid and sphingolipid head groups. Cholesterol is known as a "sterol" because it is made out of a alcohol and steroid.

What are the two sources of cholesterol in the human body?

Cholesterol in your body comes from two main sources: your liver and your diet. Your liver, other organs, and other cells in your body produce about 75 percent of the cholesterol in your blood. The other 25 percent of cholesterol in your body is affected by the foods you eat.

What causes high cholesterol?

Causes of high cholesterol
Many different factors can contribute to high blood cholesterol, including lifestyle factors like smoking, an unhealthy diet and lack of exercise, as well as having an underlying condition, such as high blood pressure or diabetes.

What organ absorbs cholesterol?

Dietary cholesterol that is found in animal foods is digested and absorbed like other lipids. It is carried by lipoproteins through the bloodstream to the body cells and the liver.

How many hydrogens are in cholesterol?

3.1Computed Properties
Property Name Property Value
Molecular Weight 386.7 g/mol
XLogP3 8.7
Hydrogen Bond Donor Count 1
Hydrogen Bond Acceptor Count 1

What is the major biological use for cholesterol?

Cholesterol fulfills a number of biological functions and is necessary for successful human homeostasis. It not only acts as a precursor to bile acids, but it also assists in steroid and vitamin D synthesis as well as playing a central role in maintaining cellular membrane rigidity.