All of the following are functions of modified carbohydrate molecules except
A) as chitin they act as a structural component of lobster shells.
B) as heparin they form a fibrous network in blood clots.
C) as a component of hemoglobin they transport oxygen.
D) as a receptor molecule on cell surfaces they assist in the functioning of the immune system.
E) as a component of cartilage they provide support to joints.
Question 2
Which of the following equations is not balanced?
A) 2 Na + 2 H2O 2 NaOH + H2
B) C3H8 + 5 O2 3 CO2 + 4 H2O
C) 2 H2 + O2 2 H2O
D) SO2 + O2 SO3
E) 2 Al + 6 HCl 2 AlCl3 + 3 H2
Question 3
Which is the correct equation for the reaction of magnesium with hydrochloric acid to produce hydrogen and magnesium chloride?
A) Mg + 2 HCl H2 + MgCl2
B) Mg + HCl H + MgCl
C) 2 Mg + 6 HCl 3 H2 + 2 MgCl2
D) Mg + 2 HCl 2 H + MgCl2
E) Mg + 3 HCl 3 H + MgCl2
Question 4
A sugar present in honey in a 50/50 ratio with glucose is
A) fructose.
B) sucrose.
C) maltose.
D) glucose.
E) mannose.
Representations of molecules
Polar Nature of Water Molecules
Some of the many small molecules found in cells
Energy of reactant molecules.
The basis of modified dihybrid F2 phenotypic ratios