Description : Which is the free living soil bacteria in fixes nitrogen? Anatomy: Azotobacter.
Last Answer : Who in 1939 suggested the name meson for middle-weight particles?
Description : Azotobacter and Beijerinckia are the examples of (a) Symbiotic nitrogen-fixers (b) Non-symbiotic nitrogen-fixers (c) Ammonifying bacteria (d) Disease causing bacteria
Last Answer : Ans. ((b))
Description : Two bacteria found to be very useful in genetic engineering experiments are (a) Nitrobacter and Azotobacter (b) Rhizobium and Diplococcus (c) Nitrosomonas and Klebsiella (d) Escherichia and Agrobacterium.
Last Answer : (d) Escherichia and Agrobacterium.
Description : The Ti plasmid, is often used for making transgenic plants. The plasmid is found in (a) Azotobacter (b) Rhizobium of the roots of leguminous plants (c) Agrobacterium (d) Yeast as a 2 mm plasmid.
Last Answer : (c) Agrobacterium
Description : Which of the following is non-symbiotic biofertilizer? (a) Anabaena (b) Rhizobium (c) VAM (d) Azotobacter
Last Answer : (d) Azotobacter
Description : An organism used as a biofertilizer for raising soybean crop is (a) Azotobacter (b) Azospirillum (c) Rhizobium (d) Nostoc.
Last Answer : (c) Rhizobium
Description : Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition? (a) Azotobacter (b) Aspergillus (c) Glomus (d) Trichoderma
Last Answer : (c) Glomus
Description : The citric acid is produced by (a) Candida utilis (b) Azotobacter suboxydans (c) Aspergillus niger (d) Streptococcus lactis.
Last Answer : (c) Aspergillus niger
Description : Which of the following is used to manufacture ethanol from starch? (a) Penicillium (b) Saccharomyces (c) Azotobacter (d) Lactobacillus
Last Answer : (b) Saccharomyces
Description : Azotobacter fixes atmospheric nitrogen in the soil by— (A) Symbiotically (B) Non-symbiotically (C) Both (A) and (B) (D) None of these
Last Answer : (A) Symbiotically
Description : One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of (a) violet and green light (b) indigo and green light (c) orange and yellow light (d) blue and red light.
Last Answer : (d) blue and red light.
Description : A non-photosynthetic aerobic nitrogen fixing soil bacterium is (a) Rhizobium (b) Clostridium (c) Azotobacter (d) Klebsiella.
Last Answer : (c) Azotobacter
Description : Which of the following is free-living aerobic non- photosynthetic nitrogen-fixing bacterium? (a) Nostoc (b) Azospirillum (c) Rhizobium (d) Azotobacter
Description : One of the free-living, anaerobic nitrogen-fixeris (a) Beijerinckia (b) Rhodospirillum (c) Rhizobium (d) Azotobacter.
Last Answer : b) Rhodospirillum
Description : A large number of organic compounds can be decomposed by (a) Azotobacter (b) Chemolithotrophs (c) Mycoplasma (d) Pseudomonas.
Last Answer : (b) Chemolithotrophs
Description : Azotobacter and Bacillus polymyxa are the examples of (a) pathogenic bacteria (b) decomposers (c) symbiotic N2 fixer (d) non-symbiotic N2 fixer.
Last Answer : (d) non-symbiotic N2 fixer
Description : Symbiotic nitrogen fixing bacteria is — a. Azotobacter b. Azospirillum c. Rhizobium d. None of these
Last Answer : c. Rhizobium
Description : “Azotobacter” bacteria is known for biological fixation of which atmospheric gas? a. A Oxygen b. B Nitrogen c. C Carbon Dioxide d. D Helium
Last Answer : b. B Nitrogen
Description : Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition ? (1) Trichoderma (2) Azotobacter (3) Aspergillus (4) Glomus
Last Answer : (4) Glomus