Chapter 19 review (Professor powerpoint) Flashcards
What is the primary function of steroid hormones in the body?
A) Energy storage
B) Chemical Signaling and communication
C) Structural Support
D) Blood Clotting
Chemical signaling and communication.
What role do proteins play in the structures of lipoproteins?
A) They store energy.
B) They act as receptors.
C) They provide structural support.
D) They enhance lipid solubility and transport.
D) The enhance lipid solubility and transport.
What characteristics of lipids make them essential for forming biological membranes?
A) Their high solubility in water
B) Their ability to form lipid bilayers
C) Their high molecular Weight
D) Their ionic nature.
B) Their ability to form lipid bilayers.
Which component of lipoproteins helps to increase the solubility of lipids in water?
A) Fatty acids
B) Steroid rings
C) Glycerophospholipids
D) Waxes
C) Glycerophospholipids
What is the primary function of lipoproteins in the body?
A) Store genetic information
B) Facilitate the transport of lipids in the bloodstream
C) Serve as structural components of cellmembranes
D) Act as enzymes for metabolic reactions
B) Facilitate the transport of lipids in the bloodstream
Why are lipids generally insoluble in water?
A) They contain multiple hydroxyl groups.
B) They are highly polar molecules.
C) They are nonpolar substances.
D) They have strong ionic bonds.
C)They are nonpolar substances.
What are water-soluble complexes formed when lipids combine with glyceroph ospholipids and proteins called?
A) Liposomes
B) Lipoproteins
C) Micelles
D) Triglycerides
B) Lipoproteins
Which of the following lipids does not contain fatty acids?
A) Phospholipids
B) Triglycerides
C) Steroids
D) Waxes
C) Steroids
What is the role of essential fatty acids in the diet?
A) They are synthesized by the body.
B)They must be obtained from the diet.
C) They are not important for health.
D) They are only found in animal products.
B) They MUST be obtained from the diet.
acids?
Which of the following statements is true regarding aty
at room temperature
A) Saturated fatty acids are not natural and always liquid
B) Unsaturated fatty acids contain only single bonds.
C) Polyunsaturated fatty acids have multiple double
bonds.
D) All naturally occurring fatty acids are saturated.
C) Polyunsaturated fatty acids have multiple double
bonds.
What is the primary characteristic that distinguishes saturated fatty acids from unsaturated fatty acids?
A) The presence of a carboxylic acid group
B) The length of the carbon chain
C)The presence of one or more double bonds
D) The presence of multiple hydroxyl groups
C)The presence of one or more double bonds makes it an unsaturated fatty acid.
Which of the following fatty acids is a polyunsaturated
fatty acid?
A) Myristic Acid
B) Stearic Acid
C) Linoleic Acid
D) Palmitic Acid
C) Linoleic Acid (One N!)
Almost all naturally occurring unsaturated fatty acids contain which type of double bond?
A) Trans double bonds
B) Cis double bonds
C) Triple bonds
D) No double bonds
B) Cis double bonds
Which type of lipid is characterized by having two or more double bonds in its structure?
A) Saturated Fat
B) Monounsaturated Fat
C) Polyunsaturated Fat
D) Polysaturated fat
C) Polyunsaturated Fat
What is the characteristic structure of steroids?
A) Long, unbranched carbon chains
B) Four fused carbon rings
C) A glycerol backbone with three fatty acids
D) A single hydrocarbon chain with one double bond
B) Four fused carbon rings
