I: | Almost all enzymes are proteins. |
II: | Some nucleic acids can behave like enzymes. |
III: | No enzyme in living organisms can function above 40 °C. |
IV: | Enzymes are the reason that chemicals react with each other. |
V: | Enzymes are not sensitive to pH in their environment. |
Statement I: | Palmitic acid has 16 carbons including carboxyl carbon. |
Statement II: | Arachidonic acid has 20 carbon atoms including the carboxyl carbon. |
Column I | Column II | ||
A. | Lyases | P. | catalyse removal of groups from substrates by mechanisms other than hydrolysis, leaving double bonds |
B. | Ligases | Q. | catalyse the linking together of 2 compounds |
C. | Transferases | R. | catalyse the transfer of a group other than hydrogen between a pair of substrates |
D. | Isomerases | S. | catalyse inter-conversion of optical, geometric or positional isomers |
A | B | C | D | |
1. | P | Q | R | S |
2. | Q | P | R | S |
3. | P | Q | S | R |
4. | R | R | Q | S |
1. | Riboflavin | 2. | Pantothenic acid |
3. | Niacin | 4. | Pteroylglutamic acid |
I: | Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide. |
II: | Starch is a homopolymer. |
III: | Inulin is a polymer of fructose. |
IV: | In glycogen, the right end is called the reducing end, and the left end is called the non-reducing end. |
1. | Lipids are generally water insoluble. |
2. | Fatty acids could be saturated (without double bond) or unsaturated (with one or more C=C double bonds). |
3. | Glycerol is trihydroxy propane. |
4. | No lipids have both glycerol and fatty acids. |
1. | have molecular weights ranging from 18 to around 800 daltons (Da) approximately. |
2. | include lipids. |
3. | are all polymeric substances. |
4. | correspond to the cytoplasm of a typical cell. |