Chapter 2 Review 2 Question Preview (ID: 776)

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Which of the following are true?
a) HCO3 is bicarbonate ion
b) all of these
c) carbonic acid dissociates into bicarbonate ions and hydrogen
d) HCO3 is a base that the body uses as a buffer

Which is false regarding ATP?
a) it is made up of ADP and Pi
b) life can go on without ATP
c) ATP stands for adenosine triphosphate
d) ATP is hydrolyzed to provide energy for cellular needs

The four elements that comprise roughly 96% of the human body are:
a) carbon, hydrogen, oxygen, sodium
b) carbon, hydrogen, oxygen, potassium
c) carbon, hydrogen, oxygen, calcium
d) carbon, hydrogen, oxygen, nitrogen

Which fat-soluable vitamin is produced when the skin is exposed to sunlight and is essential for normal bone growth?
a) vitamin E
b) vitamin D
c) vitamin K
d) vitamin A

What am I? I am a heterogenous mixture that often appears translucent. My particles are large but they do not settle out although they do scatter light. An example of me is Jell-O.
a) colloid
b) suspension
c) compound
d) molecule

Which element is present in bone and is also an important cofactor in a number of metabolic reactions?
a) iron
b) magnesium
c) iodine
d) hydrogen

Which element is a component of hemoglobin?
a) iodine
b) iron
c) sulfur
d) chlorine

The mass number of an atom is:
a) the sum of the masses of its electrons and neutrons
b) the sum of the masses of its protons and neutrons
c) the sum of the masses of its protons and electrons
d) none of these

Which of the following is/are true of isotopes
a) elements with two or more structural variations
b) same number of protons and electrons but different number of neutrons
c) unstable isotopes are radioisotopes and are used in medical imaging
d) all are true

C6H12O6 is:
a) a carbohydrate
b) 6 cargon atoms, 12 hydrogen atoms, 6 oxygen atoms
c) glucose
d) all of these

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