Bacterial metabolism (45 marks)
First question: (30 marks, 5 for each)
Write short notes on (use diagrams when possible):
- Photosystem II.
- Phosphoketolase pathway.
- Carbon cycle.
- Types of antibiotics.
- Kreb's cycle.
- Stationary phase.
Second question: (10 marks, 1 mark for each space)
Complete the following:
- Nutrients can get into the bacterial cell by three mechanisms: ……………, …………… and ……………
- Light-harvesting pigments are ……………, …………… and ……………
- The reduced end product during aerobic respiration is …………… and it is …………… for methanogenesis.
- BOD is ……………
- TAG is metabolized by …………… producing phosphatidic acid.
Third question (5 marks, 1 mark for each)
Choose the correct word between the brackets:
- A chemostat is an instrument using a system of (batch – continuous – synchronous) cultures.
- Nalidixic acid inhibits the synthesis of (cell wall- nucleic acids- proteins- cell membranes).
- Biosorption takes place in (living - non-living - both living and non-living) cells.
- PHAs are (lipid- carbohydrate- polypeptide- polyphosphate) reserve materials.
- Obligate anaerobes lack (catalase – peroxidase – catalase and peroxidase - superoxide dismutase).