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ICBB

Lipids composed of glycerol, fatty acids and phosphoric acid are known as
Phospholipids
Acylglycerols
Triglycerides
Esters
Which of these chemical groups is not hydrophilic?
-CH2CH3
-COOH
-NH2
-OH
What biological functions do lipids have? Write as many as you can remember
How many fatty acid chains are found in a glycerophospholipid?
1
2
3
4
A lipid is any substance of biochemical origin that is?
Soluble in water but insoluble in nonpolar solvents
Insoluble in both water and nonpolar solvents
Insoluble in water but soluble in nonpolar solvents
Soluble in both nonpolar solvents and water
The products of the hydrolysis of triglycerides are three fatty acids and?
An amino alcohol
Phosphoric acid
Glycerol
A long-chain alcohol
In a fatty acid, a longer hydrocarbon chain:
Increases the melting point
Has no effect on the melting point
Lowers the melting point
In a fatty acid, the presence of cis- double bonds:
Increases the melting point
Has no effect on the melting point
Lowers the melting point
Triglycerides are composed of:
Two fatty acids, a phosphate group and a glycerol molecule
Three fatty acids, sphyngomielin and glycerol
Three fatty acids and three glycerol molecules
Three fatty acids and a glycerol molecule
Which of the following sentences regarding sphingolipids is FALSE?
They have three or more fatty acid chains
They can be simple or complex
They are based on sphingosine
They can be phospholipids
Describe the chemical structure and general properties of waxes.
Which of the following sentences regarding eicosanoids is FALSE?
They are derived from arachidonic acid
They have 20 carbon atoms
They are a type of steroid hormones
They act as paracrine signals
Do you remember the name and function of any sterol derivatives? Write them down!
Which of these sentences is FALSE?
Vitamin A is important for both skin and vision
Vitamins are always hydrophobic
Vitamin D controls calcium metabolism
Vitamin A, D, E and K are fat-soluble
Find the FALSE sentence
Long chain fatty acids are made in the smooth ER
Lipids are built from acetyl-coenzyme A
Fatty acids are built two carbons at a time
Palmitate is the precursor of sterols
The nitrogenous base Adenine can pair with _____.
A. Adenine
B. Cytosine
C. Guanine
D. Thymine
DNA strands run _____ in relation to each other.
A. antiparallel
B. parallel
C. perpendicular
D. Both a and b
A nucleotide in DNA is composed of _____.
A. A deoxyribose sugar, a phosphate, and a nitrogen base
B. Only a deoxyribose sugar and a nitrogen base
C. Only a deoxyribose sugar and a phosphate
D. None of the above
Between the two strands of a DNA segment the nitrogen bases are held together by _____.
A. Covalent bonds
B. Hydrogen bonds
C. Ionic bonds
D. Metallic bonds
Nitrogen bases pair with bases that are _____.
A. available
B. complementary
C. identical
D. Both b and c
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