Description : Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas. (ii) Nostoc is a filamentous blue-green alga which fixes ... iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv).
Last Answer : (d) (i), (ii) and (iv)
Description : Weil-Felix reaction is based on sharing of antigens between A.sheep RBCs and EB virus B.mycoplasma and human O group RBCs C.rickettsial antigens and antigens of certain strains of Proteus D.none of these
Last Answer : C.rickettsial antigens and antigens of certain strains of Proteus
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 : Which of the following organisms do not have rigid cell wall A Archaea B Chlamydia C Mycoplasma D Rickettsia
Last Answer : D Rickettsia
Description : Which microorganisms are involved in the pickling process in food production?
Last Answer : In the pickling process, microorganisms grow and ferment the food in a salty environment while producing large amounts of acid from available carbohydrates. Species of Leuconostoc and Lactobacillus are ... . Different spices are added to prepare various forms of sauerkraut and pickled cucumbers.
Description : How do microorganisms influence the carbon cycle on Earth?
Last Answer : Most of the organic matter present in soil originates in plant material from leaves, rotting trees, decaying roots, and other tissues. In the carbon cycle, soil bacteria and fungi recycle ... suffer an irreversible decline as the nutrients essential for life became tied up in complex molecules.
Description : Are there any unique ways that humans derive benefits from microorganisms?
Last Answer : Humans derive substantial benefits from the activities of microorganisms. For example, many microbial species live in and on various parts of the body and prevent pathogenic bacteria from gaining a ... and used to produce vitamins, enzymes, organic acids, and other essential growth factors.
Description : When the Exxon Valdez oil spill occurred, technologists "fertilized" the oil-soaked water with _____ to modify the environment and stimulate he growth of naturally occurring microorganisms. a. nitrogen sources (e.g., urea) b. phosphorus compounds c. other mineral nutrients d. A-C above are correct
Last Answer : d. A-C above are correct
Description : Food must be moist, with a minimum water content of _____before contamination by microorganisms and spoilage can occur. a. 18% to 20% b. 10 to 15% c. 5 to 10% d. 0 to 5%
Last Answer : a. 18% to 20%
Description : Spoiled food can be caused from _____. a. enterotoxins in food b. contaminating microorganisms from the air c. human food handling d. A-C are correct
Last Answer : d. A-C are correct
Description : ____ is examples of drugs that are derived from the metabolism of microorganisms. a. Salvarsan b. Prontosil c. Penicillin d. A-C are correct
Last Answer : c. Penicillin
Description : All the following characteristics apply to fungi except: a. There may be 1.5 million species. b. They lack chlorophyll. c. They include molds and yeasts. d. They are prokaryotic microorganisms.
Last Answer : d. They are prokaryotic microorganisms.
Description : What part of the GI tract contains the largest population of microorganisms (micro biota)? a. Colon b. Jejunum c. Duodenum d. Stomach
Last Answer : a. Colon
Description : Craig Venter‘s sampling of ocean microorganisms is an example of a. Microarrays. b. Horizontal Gene Transfer. c. Microbial Forensics. d. Metagenomics.
Last Answer : d. Metagenomics.
Description : Microorganisms that use organic compounds as energy and carbon sources are a. Chemoheterotrophs. b. Chemoautotrophs. c. Photoautotrophs. d. Photoheterotrophs.
Last Answer : c. Photoautotrophs.
Description : When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called A.pentose phosphate pathway B.glycolyic pathway C.glyoxylate pathway D.oxaloacetate pathway
Last Answer : C.glyoxylate pathway
Description : Complete destruction of the microorganisms is commonly known as A- disinfection B- sterilization C- antisepsis D- none of these
Last Answer : antisepsis
Description : The medium which allows the growth of more than one microorganisms of interest but with morphologically distinguishable colonies is known as A- selective medium B- enrichment medium C- differential medium D- none of these
Last Answer : differential medium
Description : Microbiology includes which of the following groups of microorganisms? a. bacteria b. fungi c. algae d. protozoa e. all the above
Last Answer : e. all the above
Description : First person to describe microorganisms A Carolus Linnaeus B Robert Hooke C Francesco Redi D Antony van Leeuwenhoek
Last Answer : B Robert Hooke
Description : Classified in the phylum Nematoda. a. Ascaris b. Wuchereria c. Schistosoma
Last Answer : c. Schistosoma
Description : An organism without a known sexual stage would be classified in the a. Mitosporic fungi. b. Zygomycota. c. Basidiomycota. d. Ascomycota.
Last Answer : a. Mitosporic fungi.
Description : Several classes of organisms would be classified into one a. order. b. genus. c. phylum. d. family.
Last Answer : c. phylum.
Description : The stomach is a chemical barrier to infection because the stomach a. Contains bile. b. Harbors helicobacterpylori, a member of the host microbiota. c. Possesses defensive cells. d. Has an acid ph.
Last Answer : d. Has an acid ph.
Description : ________ occurs if a microbial member of the normal microbiota should gain access to sterile tissue. a. Pathogenicity Islands b. Exogenous Infection c. Endogenous Infection d. Polymicrobial Disease
Last Answer : c. Endogenous Infection
Description : Bread mold is a member of which phylum? Sexual mating types fuse forming a _____. a. Zygomycota, zyogospores b. Glomeromycota, sporangiospores c. Ascomycota, ascospores d. Basidiomycota, basidiospores
Last Answer : a. Zygomycota, zyogospores
Description : Which one of the following is NOT a member of Paramyxoviridae. a. RSV b. Human metapneumovirus c. SARS-CoV d. Parainfluenza virus
Last Answer : b. Human metapneumovirus
Description : Which of the following is correct? A- All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes B- All members of Fungi are also members of ... all members of Fungi are members of Hyphomycetes D- No member of Hyphomycetes is a member of Fungi
Last Answer : All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes
Description : Which of the following is not a member of the division Ascomycota? A- Aspergillus B- Claviceps C- Penicillium D- Rhizopus
Last Answer : Rhizopus
Description : What are the three types of archaebacteria? -Biology
Last Answer : answer:
Description : What are the important uses of archaebacteria? -Biology
Description : What is true for Archaebacteria
Last Answer : What is true for Archaebacteria A. All Halophills B. All photosynthetic C. All fossils D. Oldest living beings
Description : $ Sulphur depended archaebacteria are called thermoacidophiles. ! Archeopteryx is considered to be a connecting link between Birds and Reptiles.
Last Answer : $ Sulphur depended archaebacteria are called thermoacidophiles. ! Archeopteryx is considered to be a connecting link ... . If both As and R are wrong.
Description : Give examples of archaebacteria and eubacteria.
Last Answer : Give examples of archaebacteria and eubacteria.
Description : Why are archaebacteria called extremophiles?
Last Answer : Why are archaebacteria called extremophiles?
Description : What are Archaebacteria?
Last Answer : What are Archaebacteria?
Description : Which of these statements about Archaebacteria is false?
Last Answer : They are found only in extreme environments
Description : Which of the following are true archaebacteria? (1) Extreme halophiles (2) Extreme thermophyles (3) Methanogens (4) Presence of peptidoglycan cell wall Ans. (a) 43; Which of the following are ... plants ? (1) Saintpaulia ionantha (2) Ceratozamia hildae (3) Punica granatum (4) Senecio hadrasomum
Last Answer : Ans. ((c))
Description : What are halophile, thermoacidophile and methanogen archaebacteria?
Last Answer : There are three peculiar types of archaebacteria. The halophile archaebacteria only survive in salt-rich environments (even salinity of the sea is not enough for them). Thermoacidophile archaebacteria are ... archaebacteria are those that liberate methane gas (CH4), they are found in swamps.
Description : A few organisms are known to grow and multiply at temperatures of 100-105o C. They belong to (a) thermophilic sulphur bacteria (b) hot spring blue-green algae (c) methanogenic archaebacteria (d) marine archaebacteria.
Last Answer : (a) thermophilic sulphur bacteria
Description : What is true for archaebacteria? (a) All halophiles (b) All photosynthetics (c) All fossils (d) Oldest living beings
Last Answer : (d) Oldest living beings
Description : Thermococcus, Methanococcus and Methano- bacterium exemplify (a) bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria (b) bacteria that ... that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Last Answer : (c) archaebacteria that contain protein homologous to eukaryotic core histones
Description : The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorisedas (a) cyanobacteria (b) archaebacteria (c) chemosynthetic autotrophs (d) heterotrophic bacteria.
Last Answer : (d) heterotrophic bacteria
Description : Which of the following are likely to be present in deep sea water? (a) Blue-green algae (b) Saprophytic fungi (c) Archaebacteria (d) Eubacteria
Last Answer : c) Archaebacteria
Description : Archaebacteria differ from eubacteria in (a) cell membrane structure (b) mode of nutrition (c) cell shape (d) mode of reproduction.
Last Answer : (a) cell membrane structure
Description : Methanogens belong to (a) eubacteria (b) archaebacteria (c) dinoflagellates (d) slime moulds.
Last Answer : (b) archaebacteria
Description : Which of the following are found in extreme saline conditions? (a) Eubacteria (b) Cyanobacteria (c) Mycobacteria (d) Archaebacteria
Last Answer : (d) Archaebacteria
Description : In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria? (a) Plantae (b) Protista (c) Monera (d) Fungi
Last Answer : (c) Monera
Description : Which of the following are found in extreme saline conditions ? (1) Eubacteria (2) Cyanobacteria (3) Mycobacteria (4) Archaebacteria
Last Answer : (4) Archaebacteria