Description : Red rot of sugarcane is caused by which microorganism? a) bacteria b)virus c)fungus d)none
Last Answer : c)fungus
Description : ______ is chemical produced by fungus which inhibit the growth of other harmful microorganisms. a) antibiotic b)antibodies c)vaccine d)immunity
Last Answer : a) antibiotic
Description : Baker’s yeast produce gas which helps in rising of dough is ____________. a) oxygen b)hydrogen c)carbon dioxide d)nitrogen
Last Answer : c)carbon dioxide
Description : ______ is microorganism that can be crystallized and kept in jar for many days. a) bacteria b)fungi c)virus d)protozoa
Last Answer : c)virus
Description : ‘Coralloid root’ of Cycas helps in (1) Absorption of water (2) Absorption of water and fixation of Nitrogen (3) Anchorage (4) Transport of food
Last Answer : Absorption of water and fixation of Nitrogen
Description : Most of the bacteria in food are killed by ________. a) HCl b) NaCl c) HNo3 d) water
Last Answer : a) HCl
Description : Organ systems which are exposed to external environment are protected from bacteria by presence of ___________. a)mucus membrane b)HCl c)hairs d)plug
Last Answer : a)mucus membrane
Description : Foot and Mouth is a disease caused in cattle by __________. a) bacteria b)virus c)fungi d)none
Last Answer : b)virus
Description : _______ is suspension of dead or weakened microbes. a) vaccine b)antibodies c)antibiotics d)bacteria
Last Answer : a) vaccine
Description : Deadly disease which is caused by parasitic microorganism called plasmodium is ______. a) malaria b)dengue c)polio d)rubella
Last Answer : a) malaria
Description : What is Azofication (a) It is also known as composite fixation of nitrogen. (b) It is also known as free fixation of nitrogen (c) It is also known as nitrogen fixed by Rhizobium bacteria ` (d) It is also known as nitrogen gain through rains or snow
Last Answer : (a) It is also known as composite fixation of nitrogen.
Description : Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere? (a) Aerobic nitrate oxidation and nitrite reduction (b) ... fixation by Rhizobium in root nodules of legumes (d) Anaerobic ammonium oxidation and denitrification
Last Answer : (d) Anaerobic ammonium oxidation and denitrification
Description : The ________ disease can be prevented by maintaining good personal hygiene. a) cholera b)tuberculosis c)ringworm d)malaria
Last Answer : c)ringworm
Description : Unicellular microscopic fungi is _________ a) yeast b)mould c)toadstool d)penicillium
Last Answer : a) yeast
Description : Ability to eat away germ is speciality of ________. a)red blood cell b)white blood cell c)liver d)plasma
Last Answer : b)white blood cell
Description : Hyperthermophiles are micro organism which live at ____________. a) temperatures between 80^o-122^0 c)cold desert b) very low temperatures d)salt water lake
Last Answer : a) temperatures between 80^o-122^0
Description : _________ is pressurised heating for a short time. a) pasteurisation b)drying c)vacuum packing d)canning
Last Answer : a) pasteurisation
Description : Which of the given food is preserved by drying method? a) milk b)papaya c)jam d)jelly
Last Answer : b)papaya
Description : Typhoid spreads through _________. a) contaminated water b)air c)animal d)insects
Last Answer : a) contaminated water
Description : _____ is the natural ability of an organism to have an inbuilt mechanism to resist and destroy the infection. a) antibiotic b)immunity c)antibodies d)none
Last Answer : b)immunity
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 : Voralloid root' of Gyms helps in (1) Absorption of water (2) Absorption of water and fixation of Nitrogen (3) Anchorage (4) Transport of food
Last Answer : (2) Absorption of water and fixation of Nitrogen Explanation: Branch roots are of two kinds: long-branching geotropic roots and shortbranching apogeotropic roots, which are referred to as coralloid ... algae), which fix nitrogen. It also collects water and soil nutrients and store carbohydrates.
Description : All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia (a) can induce root nodules on many plant species (b) can fix ... its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
Last Answer : (b) can fix nitrogen in the free-living state
Description : Lichen is an association between which of the two? (1) Algae and fungus (2) Algae and tree (3) Fungus and tree (4) Bacteria and legume plant
Last Answer : (1) Algae and fungus Explanation: A lichen is an organism that is formed by the symbiotic association of a fungus and an algae or cyanobacterium. It occurs as crusty patches or bushy growths on tree trunks, bare ground, etc. The properties are sometimes plant-like, but lichens are not plants.
Description : Lichen is an association between which of the two ? (1) Algae and fungus (2) Algae and tree (3) Fungus and tree (4) Bacteria and legume plant
Last Answer : Algae and fungus
Description : Symbiotic nitrogen fixing bacteria is — a. Azotobacter b. Azospirillum c. Rhizobium d. None of these
Last Answer : c. Rhizobium
Description : There exists a close association between the alga and the fungus within a lichen. The fungus (a) provides protection, anchorage and absorption for the algae (b) provides food for the alga (c) fixes the atmospheric nitrogen for the alga (d) releases oxygen for the alga.
Last Answer : (a) provides protection, anchorage and absorption for the algae
Description : other than bacteria which factor leads to nitrogen fixation -General Knowledge
Last Answer : Other than bacteria, flood leads to nitrogen fixation.
Description : Which one of the following bacteria has potential for nitrogen fixation
Last Answer : Which one of the following bacteria has potential for nitrogen fixation A. Nitrosomonas B. Nitrobacter C. Nitrosococcus D. Rhizobium
Description : The bacteria responsible for ‘nitrogen fixation’ is found in the roots of (a) grass (b) citrus plants (c) leguminous plants (d) neem tree
Last Answer : Ans:(c)
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 : Which is a free living bacteria that help in nitrogen fixation?
Last Answer : Azotohacter
Description : Thiobacillus is a group of bacteria helpful in carrying out (a) denitrification (b) nitrogen fixation (c) chemoautotrophic fixation (d) nitrification.
Last Answer : (a) denitrification
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 : Bacteria, as a group, are responsible for A.nitrogen oxidation B.sulfur oxidation C.nitrogen fixation D.all of these
Last Answer : D.all of these
Description : Nitrogen fixation is accomplished by: a) plants b) bacteria c) animals d) viruses
Last Answer : ANSWER: B -- bacteria
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 : Nitrogen fixation in root nodules of Alnus is brought about by (a) Frankia (b) Azorhizobium (c) Bradyrhizobium (d) Clostridium
Last Answer : (a) Frankia
Description : Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism? (a) Crotalaria juncea (b) Cycas revoluta (c) Cicer arietinum (d) Casuarina equisetifolia
Last Answer : (d) Casuarina equisetifolia
Description : Which bacterium is used for nitrogen fixation in sugarcane field?
Last Answer : Ans.Acetobactor diazotrophicus
Description : Which one of the following helps in absorption of phosphorus from soil by plants? (a) Glomus (b) Rhizobium (c) Frankia (d) Anabaena
Last Answer : (a) Glomus
Description : Farmers have reported over 50% higher yields of rice by using which of the following biofertilizer? (a) Cyanobacteria (b) legume-Rhizobium symbiosis (c) Mycorrhiza (d) Azolla pinnata
Last Answer : (d) Azolla pinnata
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 : 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 : Rhizobium is a kind of (1) Photosynthetic bacteria (2) Symbiotic bacteria (3) Parasitic bacteria (4) Saprophytic bacteria
Last Answer : Symbiotic bacteria
Description : Is it normal for needle to be brown or yellow on a CHAMAECYPARIS PISIFERA CYANO VIRIDIS?
Last Answer : Need Answer
Description : Explain the structure of the cyano bacterial cell -Biology
Last Answer : answer:
Description : Oxygen is not produced during photosynthesis by (a) Green sulphur bacteria (b) Nostoc (c) Cycas (d) Chara.
Last Answer : (a) Green sulphur bacteria