1) hemoglobin is an example of which of the following?
a.an allosteric proteinc.both a and b
b.a conjugated proteind.neither a nor b
2) the mass of a neutron is approximately which of the following?
a.12 g
b.1 g
c.12 amu
d.1 amu
3) under normal conditions which of the following is involved in the reabsorption of
water?
a.insulinc.vasopressin
b.oxytocind.none of these
4) which of the following is the approximate pressure of oxygen in the alveoli?
a.40 mm hgc.160 mm hg
b.100 mm hgd.760 mm hg
5) what is the correct name for xef4?
a.xenon fluoride
b.xenon difluoride
c.xenon tetrafluoride
d.xenon hexafluoride
6) which of the following is true of the number of subshells associated with a particular
shell?
a.it depends on which atom is being considered.
b.it depends on the particular shell being considered.
c.it depends on both a and b.
d.it depends on neither a nor b.
7) which of the following is true for the molecule o=c=s?
a.o=c=s is nonpolar because it contains only double bonds.
b.o=c=s is nonpolar because it is linear.
c.o=c=s is polar because it has a bent shape.
d.o=c=s is polar because the polarities of the o=c and c=s do not cancel.
8) what is the name of the species formed when a bromine atom gains an electron?
a.bromate
b.bromide
c.bromine
d.bromine ion
9) how many unpaired electrons are there in a nitrogen atom in its ground state?
a.2
b.3
c.4
d.5
10) consider the diagram below.
which of the following correctly represents the components transported by the lettered
arrows?
a.a – waste
b.b – oxygen
c.c – food
d.d – carbon dioxide
e.both b and d are correct representations.