NCERT - Microbes in Human Welfare Questions and Answers of Class 12 Biology | GkSeries

Sports GK Questions and Answers 2024 (Latest Updated)

Awards & Honours GK Questions 2024 (Latest Updated)

Questions
16 Secondary sewage treatment is mainly a
1 Biological process
2 Chemical process
3 Virtual process
4 Physical process

Answer: Biological process
17 During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded?
1 Hemi-cellulose
2 Lignin
3 Lipids
4 Cellulose

Answer: Lignin
Advertisement
Article and Schedule Quiz Start Test!
DOWNLOAD CURRENT AFFAIRS PDF FROM APP
18 Which of the following is a symbiotic nitrogen fixer?
1 Azolla
2 Glomus
3 Azotobacter
4 Frankia

Answer: Frankia
19 Ethanol is commercially produced through a particular species of
1 Aspergillus
2 Saccharomyces
3 Clostridium
4 Trichoderma

Answer: Saccharomyces
20 A patient brought to a hospital with myocardial infarction is normally immediately given
1 Cyclosporin–A
2 Statins
3 Penicillin
4 Streptokinase

Answer: Streptokinase
21 The term antibiotic was coined by:
1 Howard Florey
2 John Tyndall
3 Selman Waksman
4 Gerhard Domagk

Answer: Selman Waksman
22 An important drug is obtained from the bark of
1 Withania
2 Cinchona
3 Papaver
4 Momordica

Answer: Cinchona
23 Select the correct statement from the following
1 Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
2 Biogas is produced by the activity of aerobic bacteria on animal waste
3 Methanobacterium is an aerobic bacterium found in rumen of cattle
4 Biogas, commonly called gobar gas, is pure methane

Answer: Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
24 Which of the following microbes is used for commercial production of ethanol?
1 Trichoderma polysporum
2 Streptococcus
3 Clostridium butylicum
4 Saccharomyces cerevisiae

Answer: Saccharomyces cerevisiae
25 Which of the following will begin fixing nitrogen only after they stop reproducing?
1 Penicillium
2 Rhizobium
3 Aspergillus
4 Streptococcus

Answer: Rhizobium
26 Organisms called Methanogens are most abundant in a
1 Hot spring
2 Hot spring
3 Cattle yard
4 Polluted stream

Answer: Cattle yard
27 Bacillus thuringiensis (Bt) strains have been used for designing novel
1 Biofertilizers
2 Bio-mineralization processes
3 Bio-insecticidal plants
4 Bio-metallurgical techniques

Answer: Bio-insecticidal plants
28 What is the common name of Drosophila melanogaster?
1 Fruit fly
2 Roundworm
3 Zebrafish
4 Chlamydia

Answer: Fruit fly
29 The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorized as
1 Chemosynthetic autotrophs
2 Heterotrophic bacteria
3 Cyanobacteria
4 Archaebacteria

Answer: Heterotrophic bacteria
30 Which one of the following is not used in organic farming?
1 Glomus
2 Snail
3 Oscillatoria
4 Earthworm

Answer: Snail

Random GK Questions

Q. Which of the following is has the sole right of issuing currency (except one rupee coins and notes) in India?
Q. Which of the following is related to Shield volcano formation ?
Q. In order of their distances from the Sun, which of the following planets lie between Mars and Uranus ?
Q. The special provisions to Finance Bills is provided under the Constitution of India in :
Q. In which country is the volcano Mount Gamkonora, the highest peak of Halmahera island, which erupted in July 2007 located?
Q. Who discovered the Cholera-bacillus?

Chapters

Assam Direct Recruitment Test Series

Teacher Eligibility Test

Assam Direct Recruitment Test Series