Missed Questions - Ch. 2 Flashcards
Which of the following inorganic substances is a metabolic waste product?
A) oxygen B) carbon dioxide C) inorganic salts D) all of the above
B) carbon dioxide
What is the pH of a solution whose H+ concentration is 0.0001?
A) 4 B) -3 C) 3 D) 2
A) 4
Explanation - however many numbers come after the decimal point of the concentration will be the equivalent pH
The element sulfur is sometimes found in which one of the following molecules.
A) carbohydrate B) lipid C) protein D) nucleic acid
C) protein
Explanation - Proteins contain C, H, O, N, and sometimes sulfur
The atomic weight of an atom is determined by the sum of its protons and neutrons.
A) True B) False
A) True
A molecular formula depicts how atoms are joined and arranged in molecules.
A) True B) False
B) False
Explanation - A molecular formula will only show the relative numbers of atoms, not the structures
Electrolytes that release hydrogen ions in water are called bases.
A) True B) False
B) False
Explanation - acids release hydrogen atoms or H+
Hydrogen bonds are found in
A) protein molecules B) gaseous oxygen C) carbohydrate molecules D) inorganic molecules exclusively
A) protein molecules
A fat that has all of its carbon atoms joined by single carbon to carbon bonds is said to be
A) saturated B) unsaturated C) polyunsaturated D) complete
A) saturated
The protons carry a positive electrical charge and electrons carry a negative electrical charge.
A) True B) False
A) True
A molecular formula depicts how atoms are joined and arranged in molecules.
A) True B) False
B) False
