Question 1:
Match the items in Column-A with that of Column-B:
Column-A: (i) Lady bird beetle, (ii) Mycorrhiza, (iii) Biological control, (iv) Biogas.
Column-B: (a) Methanobacterium, (b) Trichoderma, (c) Aphids, (d) Glomus.
Choose the option that matches the items of Column A with that of B correctly:
Question 2:
For commercial and industrial production of citric acid, which one of the following microbes is used?
Question 3:
Bottled fruit juices are clearer as compared to those made at home, as they are clarified by the use of :
Question 4:
Large scale industrial production of Butyric acid for human welfare is done using the microbe :
Question 5:
Large scale industrial production of Butyric acid for human welfare is done using the microbe :
Question 6:
Large scale industrial production of Butyric acid for human welfare is done using the microbe :
Question 7:
Bioactive molecule Cyclosporin A used for human welfare is derived from
Question 8:
During biological treatment of sewage, the masses of bacteria held together by fungal filaments to form mesh like structures are called
Question 9:
Assertion (A): Swiss cheese is characterized by large holes due to $\text{CO}_2$ production.
Reason (R): It is ripened by growing a specific fungi.
Reason (R): It is ripened by growing a specific fungi.
Question 10:
OR (B) (i) Name an alcoholic drink which is produced by the help of microbes: (1) With distillation (2) Without distillation
(ii) Explain how cyanobacteria can be used as bio-fertilizer.
Question 11:
Explain how are plants benefitted by their association with "Glomus species".
Question 12:
- (a) What do you mean by activated sludge in an STP?
- (b) Explain the biological treatment of the major part of the sludge transferred from the large aeration tank into the anaerobic sludge digesters before its final release into the natural water bodies.
Question 13:
Explain the biological treatment of primary effluent when passed into the large aeration tanks in a sewage treatment plant (STP).
Question 14:
Identify a, b, c, d, e and f in the table given below :
| Sl. No. | Organism | Bioactive Molecule | Use |
|---|---|---|---|
| 1. | Monascus purpureus | a | b |
| 2. | c | d | Antibiotic |
| 3. | e | Cyclosporin A | f |
Question 15:
Study the figure given below and answer the questions that follow. [Figure is implied: Secondary Sewage Treatment Plant showing Aeration Tank, Settling Tank, Activated Sludge, etc.]
- (a) Identify the figure and state its importance.
- (b) Why is air diffused into the aerator tank? Explain.
- (c) (i) What changes take place in the settling tank ?
OR
(c) (ii) How is BOD related to organic matter present in the water ?