Step 1: Classify bacterial shapes.
Bacteria are classified based on their shapes: Bacilli: Rod-shaped bacteria. Cocci: Spherical bacteria. Spirilla: Spiral-shaped bacteria. Diplococci: Pairs of spherical bacteria.
Step 2: Match with the question. The question specifies "rod-shaped bacterial cells," which corresponds to Bacilli.
| Enzymes | class of enzymes |
| (a) Lactate dehydrogenase | (i) Isomerases |
| (b) Alanine racemase | (ii) Transferases |
| (c) Lipase | (iii) Oxidoreductases |
| (d) Hexokinase | (iv) Hydrolases |