Lecture 2 - Part 1 MC Flashcards
What elements make up carbohydrates?
A) Carbon, nitrogen, and oxygen
B) Carbon, hydrogen, and oxygen
C) Hydrogen, oxygen, and sulfur
D) Carbon, sulfur, and nitrogen
Correct Answer: B
The term “carbohydrates” refers to:
A) Carbon with oxygen
B) Carbon with water
C) Hydrogen with oxygen
D) Nitrogen with carbon
Correct Answer: B
Which of the following is NOT a primary source of carbohydrates?
A) Meats
B) Grains
C) Legumes
D) Fruits
Correct Answer: A
Dietary fiber is categorized as a carbohydrate but does not provide energy because:
A) It is digested completely by stomach acids.
B) It is absorbed directly into the bloodstream.
C) It cannot be broken down by enzymes in the GI tract.
D) It is synthesized by the body.
Correct Answer: C
Glucose, a final molecule of sugars, is:
A) Only stored as glycogen in the liver.
B) Used for energy production or stored as glycogen.
C) Not essential for brain function.
D) Converted into fat immediately after absorption.
Correct Answer: B
Lipids are not soluble in water because:
A) They are larger molecules than water.
B) They are only soluble in organic solvents.
C) Water is an organic solvent.
D) They are charged particles.
Correct Answer: B
The most abundant lipids consumed in the human diet are:
A) Cholesterol
B) Phospholipids
C) Triacylglycerols/triglycerides
D) Fatty acids
Correct Answer: C
Essential functions of lipids include all the following EXCEPT:
A) Protein synthesis
B) Energy storage and release
C) Insulation and organ protection
D) Cell signalling
Correct Answer: A
Essential fatty acids for humans include:
A) Arachidonic acid
B) Linoleic acid and linolenic acid
C) Oleic acid
D) Palmitic acid
Correct Answer: B
Proteins are composed of:
A) Fatty acids
B) Amino acids
C) Nucleic acids
D) Glucose molecules
Correct Answer: B
Which of the following is NOT a role of proteins?
A) Energy storage
B) Structural components
C) Transporters
D) Enzymes
Correct Answer: A
The statement “Not every protein is an enzyme, but every enzyme is a protein” means:
A) All proteins can catalyze chemical reactions.
B) Only enzymes contain amino acids.
C) Enzymes are a specific type of protein that acts as catalysts.
D) Proteins and enzymes are the same.
Correct Answer: C
Essential amino acids:
A) Can be synthesized by the human body in sufficient amounts.
B) Are not necessary for humans.
C) Must be obtained from the diet.
D) Include only lysine and tryptophan.
Correct Answer: C
