I: | Morphine is a strong opiate that is found naturally in opium and is mainly used as a pain medication. |
II: | Ricin is a toxin and a highly potent toxin produced in the seeds of the castor oil plant. |
III: | Concanavalin A is a lectin and is widely used in biology and biochemistry to characterize glycoproteins and other sugar-containing entities on the surface of various cells. |
IV: | Vinblastin is an anti-cancer drug typically used with other medications, to treat a number of types of cancer. |
A | B | C | D | |
1. | Reducing end | Non reducing end | α [1→4] linkage | α [1→6] linkage |
2. | Non reducing end | Reducing end | α [1→4] linkage | α [1→6] linkage |
3. | Reducing end | Non reducing end | α [1→6] linkage | α [1→4] linkage |
4. | Non reducing end | Reducing end | α [1→6] linkage | α [1→4] linkage |
What level of protein structure is shown in the given diagram?
1. Primary | 2. Secondary |
3. Tertiary | 4. Quaternary |
Which of the following categories of enzyme classification are correctly matched?
EC 1 | Oxidoreductases: catalyze oxidation/reduction reactions |
EC 2 | Hydrolases: catalyze the hydrolysis of various bonds |
EC 3 | Transferases: transfer a functional group (e.g. a methyl or phosphate group) |
EC 4 | Lyases: cleave various bonds by means other than hydrolysis and oxidation |
EC 5 | Isomerases: catalyze isomerization changes within a single molecule |
EC 6 | Ligases: join two molecules with covalent bonds. |
A | B | C | |
1. | Gastric lipase | Salivary amylase | Lingual lipase |
2. | Pepsin | Salivary amylase | Trypsin |
3. | Pepsin | Trypsin | Lactase |
4. | Rennin | Maltase | Sucrase |
1 | 2 | 3 | |
1. | 1.0 | 3.4 | 34 |
2. | 2.0 | 0.34 | 3.4 |
3. | 2.0 | 3.4 | 0.34 |
4. | 4.0 | 3.4 | 0.34 |
1. | Thymine | 2. | Thymosine |
3. | Thymidylic acid | 4. | Cytidylic acid |
Column I [Component] |
Column II [% of the total cellular mass] |
A. Protein | P. 2 |
B. Carbohydrates | Q. 1 |
C. Lipids | R. 5-7 |
D. Nucleic acids | S. 3 |
T. 10-15 | |
U. 70-90 |
A | B | C | D | |
1. | U | P | R | Q |
2. | T | S | P | R |
3. | T | P | S | R |
4. | P | Q | R | S |