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1. What are some common metabolic end products produced by different microorganisms during fermentation?
2. What is the purpose of phenol red in a carbohydrate fermentation tube?
3. What is the function of the durham tube in a fermentation tube?
4. What is the purpose of thiosulfate in the TSI agar? what ist he pH indicator in TSI agar?
5. How is the SIM medium used to detect motility?
6. What substrates are acted on in SIM medium in order for hydrogen sulfide/H2S to be produced?
7. What does cysteine desulfurase catalyze
8. What is the component in the SIM tube that makes this medium suitable to detect the production of indole by bacteria?
9. What are exoenzymes? why are they important to bacteria?
10. Why is the enzyme catalase important? Do anaerobic bacteria require catalase? explain your answer.
11. What is the importance of cytochrome oxidase to bacteria that possess it?
12. What is the function of the test reagent in the oxidase test?
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Biology Online Quiz
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1 . Question
The substrate of photo-respiration is:
2 . Question
Which one of the following is the infective stage of the Malarial Parasite?
3 . Question
|A. Chlorophyll||1. Plant disease|
|B. Nostoc||2. Photosynthetic pigment|
|C. Transpiration||3. Diazotroph|
|D. Rust of wheat||4. Loss of water from plant surface|
4 . Question
Which one of these animals is jawless?
5 . Question
Competition for food, light and space is most severe in:
- closely related species growing in the same area or niche.
- distantly related species growing in different habitats.
- distantly related species growing in the same habitats.
- closely related species growing in different habitats.
6 . Question
- a biotic community and its non-living elements.
- a population and its non-living elements.
- a biotic community.
7 . Question
Afla-toxins are produced by:
8 . Question
|A. Ascorbic acid||1. Photosynthetic pigment|
|B. Chlorophyll||2. Quencher|
|C. Carotenoid||3. Enzyme|
|D. Superoxide dismutase||4. Vitamin-C|
9 . Question
The maximum fixation of solar energy is done by:
10 . Question
Animal protein is called first class protein because it is:
- cheaper in the market
- easily digestible
- rich in essential amino acids
- delicious in taste
11 . Question
Outside the nucleus DNA is found in:
12 . Question
Allantois of Embryo helps in:
13 . Question
Which one of the following animals belongs to mollusca?
14 . Question
15 . Question
Molybdenum deficiency affects the activity of:
- chlorate reductase
- nitrate reductase
- All of the given options
16 . Question
Which one of the following is the correct sequence of ecosystem in the order of decreasing productivity?
- Oceans, mangroves, lakes, grassland
- Mangroves, oceans, grassland, lakes
- Mangroves, grasslands, lakes, oceans
- Oceans, lakes, grassland, mangroves
17 . Question
Xenobiotics which are inherently resistant to microbial attack are called as:
18 . Question
Cyanide poisoning causes death in seconds because:
- it causes lysis of red blood cells
- it denatures enzymes of the heart/muscle
- it breaks the electron transport chain
- it causes cardiac arrest
19 . Question
When one gene pair hides the effect of the other unit. The phenomenon is referred to as:
20 . Question
Haemolymph is observed in:
21 . Question
The virus without capsid but only with nucleic acids is called:
22 . Question
The immunity caused by the B-lymphocytes is called:
- Sterile immunity
- Acquired Immunity
- Cellular Immunity
- Humoral Immunity
23 . Question
Pink mould is the common name for:
24 . Question
The sleeping sickness is caused by:
25 . Question
Which of the following is biodegradable?
26 . Question
Fungi that grow on bark are said to be:
27 . Question
- abnormal increase in number of cells.
- an increase in size of a cell.
- excessive motility of muscle.
- voracious eating.
28 . Question
The part of root involved in water absorption is:
- zone of elongation
- zone of root cap
- zone of cell division
- zone of root hairs
29 . Question
Commercially important cotton fibers are:
- epidermal hairs of seeds.
- woody fibers of roots.
- phloem fibres of roots.
- bark fibers of stems.
30 . Question
A member of Liliaceae that shows reticulate venation is:
31 . Question
- manipulation of genes
- improvement of race
- study of conditions affecting organisms
- treatment of defective heredity through genetic engineering
32 . Question
33 . Question
What does Corpus luteum (CL) secrete?
34 . Question
35 . Question
Iodine test is used to detect:
36 . Question
The branch of medicine involving synthetic chemical compounds is:
37 . Question
Arsenic problem in India is primarily due to:
- overexploitation of arsenopyrite in the hinterland.
- overexploitation of coal in Bihar and Bengal.
- overexploitation of ground water in the affected areas.
- overexploitation of surface water in the affected areas.
38 . Question
One of the best solutions to get rid of non-biodegradable wastes is:
39 . Question
Vermicomposting is done by:
40 . Question
If waste materials contaminate the source of drinking water, which of the following diseases will spread?
41 . Question
Which vein brings clean blood from the lungs into the heart?
42 . Question
The biggest single-celled organism is:
43 . Question
Foramen Magnum is an aperture found in the:
44 . Question
Which branch of Zoology deals with the scientific study of animal behaviour?
45 . Question
46 . Question
A contemporary of Charles Darwin, who came to the same conclusion in the matter of organic evolution was:
- Jean Baptist Lamarck
- Thomas Huxley
- Alfred Russel Wallace
- Franklin Benjamin
47 . Question
48 . Question
Male mosquitoes take their food from:
- the human blood
- the standing water
- the sap of plants
- the dung and other debris
Both male and female mosquitoes eat the same things—Plant sap, nectar and plant derivatives—for energy. But only female mosquitoes imbibe a blood meal.
49 . Question
Total interacting animals and plants in any well defined area is known as: