1) which element accounts for nearly half the mass of the earths crust?
a.carbon
b.iron
c.oxygen
d.silicon
2) which of the following give(s) the correct order of ionization energies?
a.li > na > k > rb
b.na < mg < p < cl
c.both a and b
d.neither a nor b
3) what is the correct name for bah2?
a.monobarium dihydride
b.barium dihydride
c.barium hydrogen
d.barium hydride
4) which of the following molecules is nonpolar?
a.chcl3
b.ch2cl2
c.ch3cl
d.none, they are all polar.
5) the following images shows some representations of some of the common
components of blood.
which type of cell is synthesized in only the bone marrow?
a.erythrocytes
b.thrombocytes
c.leukocytes
d.agranular leukocytes
e.all of these are synthesized in more than one location.
6) what is the mass number of an atom which is made up of 27 protons,33 neutrons and
27 electrons?
a.87
b.60
c.33
d.27
7) the heme portion of hemoglobin is an example of which of the following?
a.a cofactorc.a prosthetic group
b.a conjugated proteind.none of these
8) which of the following sequences gives the correct order as we move from left to
right across a row of the period table?
a.metal, metalloid, nonmetal
b.metal, nonmetal, metalloid
c.nonmetal, metal, metalloid
d.nonmetal, metalloid, metal
9) propranolol belongs to which class of drugs used to treat hypertension?
a.ace inhibitorsc. blockers
b.diureticsd.vasodilators
10) which of the following ions is associated with the heme portion of hemoglobin?
a.ca2+c.mg2+
b.fe2+d.zn2+
11) carbonic anhydrase is associated with the establishment of which of the following
equilibria?
a.h2co3 h+ + hco3c.both a and b
b.h2co3 h2o + co2d.neither a nor b
12) consider the periodic table given below.
which number represents an element classified as a transition metal?
a.1
b.2
c.3
d.4
e.5
f.6
g.7
h.none of these
13) which of the following is associated with a low erythrocyte count?
a.anemiac.leukemia
b.polycythemiad.typhoid
14) which of the following is true of a 1 gram sample of iron?
a.it contains a very, very small number of atoms, since each individual atom has a large
mass.
b.it contains a very huge number of atoms, each of which is fairly massive.
c.it contains a very, very huge number of atoms, each of which has an extremely tiny
mass.
d.none of the above
15) formaldehyde has the chemical formula ch2o. how many nonbonding electrons
must be shown in the lewis structure of formaldehyde?
a.0
b.4
c.8
d.12
16) baroreceptors perform which of the following functions?
a.send signals which control fluid pressure in the brain
b.send signals which control the heart rate
c.send signals which control the rate of breathing
d.none of these