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 : Symbiotic nitrogen fixing bacteria is — a. Azotobacter b. Azospirillum c. Rhizobium d. None of these
Last Answer : c. Rhizobium
Description : Name the organisms which do not derive energy directly or indirectly from sun. (a) Chemosynthetic bacteria (b) Pathogenic bacteria (c) Symbiotic bacteria (d) Mould
Last Answer : (a) Chemosynthetic bacteria
Description : Non - symbiotic N2 - fixation is carried out by bacteria such as.......... and.......... ?
Last Answer : Azotobacter & Clostridium
Description : Which of the following is non-symbiotic biofertilizer? (a) Anabaena (b) Rhizobium (c) VAM (d) Azotobacter
Last Answer : (d) Azotobacter
Description : Symbiotic N2 fixing bacteria in leguminous crop.
Last Answer : Ans. Rhizobium
Description : Symbiotic N2 - fixation is carried out by which bacteria?
Last Answer : Rhizobium leguminosarum
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 : 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
Description : Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? (a) Pseudomonas (b) Mycoplasma (c) Nostoc (d) Bacillus
Last Answer : (b) Mycoplasma
Description : Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ? (1) Pseudomonas (2) Mycoplasma (3) Nostoc (4) Bacillus
Last Answer : (2) Mycoplasma
Description : Name two non - symbiotic N2- fixing blue - green algae (cyanobacteria)?
Last Answer : Nostoc; Anabaena
Description : Mycorrhiza is an example of (a) symbiotic relationship (b) ectoparasitism (c) endoparasitism (d) decomposers.
Last Answer : (a) symbiotic relationship
Description : Presence of __________ bacteria in water causes disease like typhoid. (A) Aerobic (B) Pathogenic (C) Anaerobic (D) Non-pathogenic
Last Answer : (B) Pathogenic
Description : Which of the following is/are examples for symbiotic association? (1) Algae - lichen (2) Plant roots - rhizobium bacteria (3) Both are right (4) Both are wrong
Last Answer : (3) Both are right
Description : Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation ... the conversion of atmospheric N2 to NH3. (d) Nitrogenase is insensitive to oxygen.
Last Answer : (d) Nitrogenase is insensitive to oxygen.
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 : 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 : 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 : “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 : Are Toxins from pathogenic bacteria can be destroyed by freezing and cooking?
Last Answer : What is the answer ?
Description : What are some mechanisms by which pathogenic bacteria cause diseases? Why is this knowledge important?
Last Answer : Pathogenic bacteria have characteristics known as virulence factors that help them to parasite their host. Some bacteria have fimbriae, cilium-like structures that attach the bacterial cell to ... that contaminate the organism. Bacterial Cell Review - Image Diversity: bacterial virulence factors
Description : Pathogenic bacteria secrete - (1) Antigens (2) Antibodies (3) Hormones (4) Interferons
Last Answer : (1) Antigens Explanation: Pathogenic bacteria secrete various virulence factors, including toxins, lipases and pro-teases that allow them to infect, breakdown and colonize host tissue. Among ... while phospholipases cleaves and hydrolyzes the ester bonds of most phospholipids in cell membrane.
Description : Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of (A) Ozone and iodine (B) Chlorine or its compounds (C) Ultraviolet light for irradiation of water (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Filtration of water is done to remove (A) Colour (B) Odour (C) Turbidity (D) Pathogenic bacteria
Last Answer : (C) Turbidity
Description : Most pathogenic bacteria are classified as ____. a. psychrotrophic c. psychrophilic b. thermotrophic d. mesophilic
Last Answer : d. mesophilic
Description : Pathogenic bacteria secrete (1) Antigens (2) Antibodies (3) Hormones (4) Interferons
Last Answer : Antigens
Description : Assertion: Detritus food chain begins with decomposers. Reason: Detrivores, like fungi and bacteria, are major decomposers in such food chains.
Last Answer : Assertion: Detritus food chain begins with decomposers. Reason: Detrivores, like fungi and bacteria, are ... and Reason are false, then mark (4)
Description : Describe the role of Bacteria and Fungi as decomposers?
Last Answer : Decomposers are those organisms, which feed on dead organisms. Many bacteria and fungi are decomposers: - Decomposition: - i) Decomposers secrete enzymes in food. ii) These enzymes break ... carbon dioxide, Hydrogen sulphide, water vapours and salts like nitrates, sulphates and phosphate etc.
Description : Bacteria and fungi are belonging to the following category of organization B A. Scavengers B. Decomposers C. Carnivores D. Amphibians
Last Answer : Decomposers
Description : Lichen is considered to be a symbiotic association of two living organisms. Which organisms are involved in it? (a) Algae and bacteria (b) Algae and fungi (c) Algae and bryophytes (d) Fungi and bryophytes
Last Answer : Ans:(b)
Description : Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in - (1) peas (2) wheat (3) corn (4) oats
Last Answer : (1) peas Explanation: Nitrogen-fixing bacteria are microorganisms capable of transforming atmospheric nitrogen into fixed. nitrogen. Rhizobium is one such bacteria that is associated with leguminous plants ... and convert free nitrogen to ammonia, which the host plant utilizes for its development.
Description : Rhizobium is a kind of – (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria
Last Answer : (2) Symbiotic bacteria Explanation: Rhizobia are soil bacteria that fix nitrogen after becoming established inside root nodules of legumes. They are the only nitrogenfixing bacteria living in a symbiotic relationship with legumes. Common crop and forage legumes are peas, beans, clover, and soy.
Description : Nitrogen fixing bacteria found in the root nodules of leguminous plant is:- (1) Saprophytic (2) Parasitic (3) Symbiotic (4) Autotrophic
Last Answer : (3) Symbiotic Explanation: Many legumes have root nodules that provide a home for symbiotic nitrogenfixing bacteria called rhizobia. This relationship is particularly common in nitrogen-limited conditions. .
Description : Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in (1) peas (2) wheat (3) corn (4) oats
Last Answer : peas
Description : Rhizobium is a kind of (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria
Last Answer : Symbiotic bacteria
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 : 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 : Rod shaped bacteria is called - (1) Bacillus (2) Spirillum (3) Coccus (4) Coma
Last Answer : (1) Bacillus Explanation: Bacillus is a genus of Grampositive, rodshaped bacteria and a member of the phylum Firmicutes. Bacillus species can be obligate aerobes or facultative anaerobes, ... environmental conditions, the cells produce oval endospores that can stay dormant for extended periods.
Description : dB is a standard abbreviation used for the quantitative expression of (a) the density of bacteria in a medium (b) a particular pollutant (c) the dominant Bacillus in a culture (d) a certain pesticide.
Last Answer : (b) a particular pollutant
Description : Which one of the following bacteria has found extensive use in genetic engineering work in plants? (a) Clostridium septicum (b) Xanthomonas citri (c) Bacillus coagulens (d) Agrobacterium tumefaciens
Last Answer : (d) Agrobacterium tumefaciens
Description : The bacteria generally used for genetic engineering is (a) Agrobacterium (b) Bacillus (c) Pseudomonas (d) Clostridium.
Last Answer : (a) Agrobacterium
Description : Which of the following is NOT one of the 3 basic shapes of bacteria? a. bacillus b. coccus c. spirillum d. square
Last Answer : d. square
Description : Which one of the following is NOT a genus within the gram-positive bacteria? a. Staphylococcus b. Methanogens c. Mycoplasma d. Bacillus and Clostridium
Last Answer : b. Methanogens
Description : Rod shaped bacteria is called (1) Bacillus (2) Spirillum (3) Coccus (4) Coma
Last Answer : Bacillus
Description : What are examples of decomposers in a farm?
Last Answer : Need answer
Description : Which unicellular non-pathogenic parasite is found in the human intestine? -Do You Know?
Last Answer : answer: