lipids Flashcards
(27 cards)
What are lipids primarily composed of?
Lipids are primarily composed of carbon, hydrogen, and oxygen.
True or False: Lipids are insoluble in water.
True
What is the main function of lipids in the body?
Lipids serve as a major energy source and are essential for cell structure.
Fill in the blank: Lipids are a diverse group of molecules that include _______, _______, and _______.
fats, oils, and waxes
Which lipid is a major component of cell membranes?
Phospholipids
What type of lipid is important for the absorption of fat-soluble vitamins?
Dietary fats
True or False: Steroids are a type of lipid.
True
What is the primary function of triglycerides?
Triglycerides serve as a storage form of energy in adipose tissue.
Fill in the blank: Fatty acids are the building blocks of _______.
lipids
What is the difference between saturated and unsaturated fats?
Saturated fats have no double bonds between carbon atoms, while unsaturated fats have one or more double bonds.
True or False: Lipids play a role in insulation and protection of organs.
True
What is the function of lipoproteins in lipid transport?
Lipoproteins transport lipids in the bloodstream.
Fill in the blank: _______ are lipids that are derived from arachidonic acid and play a role in inflammation.
Eicosanoids
True or False: Phospholipids have a hydrophilic head and hydrophobic tail.
True
What is the primary function of waxes in living organisms?
Waxes provide a protective coating for plants and animals.
True or False: Lipids are an essential component of cell membranes.
True
True or False: Lipids have a higher energy content per gram compared to proteins.
True
what are lipids made up of?
glycerol and fatty acids
which fat is better to eat?
unsaturated fat
why is saturated fat unhealthy?
they form LDLs which cause atheromas. this can cause angina and heart attack
why is unsaturated fat better?
they form HDLs which ‘collect’ the atheromas in the bloodstream back to the liver which lowers the risk for cardiovascular and coronary heart disease.
why is unsaturated fat better?
they form HDLs which ‘collect’ the atheromas in the bloodstream back to the liver which lowers the risk for cardiovascular and coronary heart disease.
the folding of the polypeptide chain into an alpha helix or a beta pleated sheet
secondary structure
2 or more polypeptide chains bonded together
quaternary structure
