Description : The Ames test is used to a. Identify Potential Human Carcinogens. b. Discover Auxotrophic Mutants. c. Find Pathogenic Bacterial Species. d. Identify Antibiotic Resistant Mutants.
Last Answer : a. Identify Potential Human Carcinogens.
Description : Commercial scale production of amino acids is typically carried out using A- regulatory mutants to cause overproduction of biochemical intermediates B- creation of an intentional increase in membrane permeability to increase release of the amino acids C- both (a) and (b) D- none of the above
Last Answer : both (a) and (b)
Description : What are mutants?
Last Answer : The plants which are genetically changed by using chemical are called mutants
Description : Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These ... minimal medium (c) only on plates with streptomycin (d) only on plates without streptomycin.
Last Answer : (d) only on plates without streptomycin.
Last Answer : (c) only on plates with streptomycin
Description : A zoonosis is a disease a. Transmitted From Humans To Animals. b. Spread From Animals To Humans. c. Transmitted Between Wild And Domestic Animals. d. Spread Between Wild Animals
Last Answer : b. Spread From Animals To Humans.
Description : Antibodies produced by a single clone of myeloma cells are referred to as _____ antibodies. a. Chimeric b. Monoclonal c. Polyclonal d. Hybrid
Last Answer : b. Monoclonal
Description : An RNA virus genome in the form of messenger RNA is referred to as a a. + strand RNA. b. double-stranded RNA c. – strand RNa d. Reverse strand RNA.
Last Answer : a. + strand RNA.
Description : Free energy change ( G) of a reaction is referred as the amount of energy Δ A- liberated during reaction B- taken up during reaction C- liberated or taken up during reaction D- none of these
Last Answer : liberated or taken up during reaction
Description : Spherical bacterial cells in chains would be a referred to as a _______ arrangement. a. Vibrio b. Streptococcus c. Staphylococcus d. Tetrad
Last Answer : b. Streptococcus
Description : The second word in a species name is referred to as the _____. a. genus b. order c. specific epithet d. biotype
Last Answer : c. specific epithet
Description : Which of the following is NOT an autoimmune disease? a. Myasthenia gravis b. Type i diabetes c. Systemic lupus erythematosus d. Rheumatoid arthritis e. All of the above are autoimmune disorders
Last Answer : e. All of the above are autoimmune disorders
Description : Systemic _____ is the most dangerous form of a Type I Hypersensitivity. a. Anaphylaxis b. Unconsciousness c. Edema d. Prostaglandins
Last Answer : a. Anaphylaxis
Description : In Type I hypersensitivity the first dose of antigen is the _____. a. Immunizing Dose b. Sensitizing Dose c. Allergizing Dose d. Activating Dose
Last Answer : b. Sensitizing Dose
Description : The transfusion reaction that arises from the mixing of incompatible blood types illustrates a/an a. Form of lupus erythematous. b. Type i hypersensitivity. c. Immune complex reaction. d. Cytotoxic hypersensitivity.
Last Answer : d. Cytotoxic hypersensitivity.
Description : : DiGeorge syndrome and X-linked (Bruton) agammaglobulinemia differ in the a. Type of antibody produced by the immune system. b. Lymphocytes that the body fails to produce. c. Systems affected by the respective diseases. d. Type of hypersensitivity that ensues
Last Answer : c. Systems affected by the respective diseases.
Description : Which one of the following applies to the disease systemic lupus erythematosus (SLE)? a. It is a type of cytotoxic hypersensitivity. b. It is often accompanied by a butterfly rash. c. It is due to an overreaction of T lymphocytes. d. It is the result of a cellular hypersensitivity.
Last Answer : d. It is the result of a cellular hypersensitivity.
Description : A cytotoxic hypersensitivity would occur if blood type is transfused into a person with blood type a. A;AB b. 0; AB c. A; 0 d. 0; B
Last Answer : a. A;AB
Description : What type of immune cell may control IgE-mediated hypersensitivities? a. Suppressor T cells b. Plasma cells c. Cytotoxic T cells d. Neutrophils
Last Answer : a. Suppressor T cells
Description : Which of the following is NOT a type I hypersensitivity? A. Food Allergies B. Contact Dermatitis C. Allergic Rhinitis D. Exercise Induced Allergies
Last Answer : B. Contact Dermatitis
Description : Type of tapeworm. a. Taenia b. Echinococcus c. Necator
Last Answer : a. Taenia
Description : Type of fluke. a. Schistosoma b. Necator c. Echinococcus
Last Answer : a. Schistosoma
Description : Arboviral encephalitis is an example of a a. disease causing gastroenteritis. b. disease spread by the fecal-oral route. c. Zoonosis d. type of hepatitis.
Last Answer : c. Zoonosis
Description : What type of immune defensive cell is found in the sublayers of the epidermis? a. Keratinocyte b. Dendritic (Langerhans) cell c. Neutrophil d. Basophil
Last Answer : b. Dendritic (Langerhans) cell
Description : What type of periodontal disease occurs when plaque bacteria build up between teeth and gums? a. Trench mouth b. ANUG c. Gingivitis d. Periodontitis
Last Answer : c. Gingivitis
Description : Which of the following is NOT a type of horizontal gene transfer between bacterial cells? a. transformation b. conjugation c. transduction d. translation
Last Answer : d. translation
Description : Which of the following characteristics would not be used to classify viruses? A.Type of cell wall structure B.Type of nucleic acid C.Presence of an envelope D.Symmetry
Last Answer : A.Type of cell wall structure
Description : Which of the following techniques may be performed quantitatively to determine the number of bacteria of a particular type? A.Pour plate B.Spread plate C.Both (a) and (b) D.Streak plate technique
Last Answer : C.Both (a) and (b)
Description : Which of the following oncogenic viruses was first detected? A.Rous sarcoma virus. B.Epstein-Barr virus C.Herpes simplex virus type 2 D.Human T cell leukaemia virus
Last Answer : A.Rous sarcoma virus.
Description : The chief type of spoilage in sweetened condensed milk may be A.gas formation by sucrose fermenting yeasts B.thickening caused by micrococci C.mold colonies growing on the surface D.all of the above
Last Answer : D.all of the above
Description : The PCR/sequencing approach to rRNA is most likely to give information about A.the species to which the bacteria are most closely related B.morphology of the bacterium C.the type of energy metabolism the bacterium has D.whether the bacterium is motile
Last Answer : A.the species to which the bacteria are most closely related
Description : The butyric acid type of fermentation in acid or medium acid foods, with swelling of the containerby the carbon dioxide and hydrogen gas is caused by A.C. butyricum B.C. pasteurianum C.both (a) and (b) D.C. sporogenes
Last Answer : C.both (a) and (b)
Description : A major difference between EHEC and EPEC is A.EHEC secretes a Shiga-like toxin and EPEC does not B.EHEC possesses a type III secretion system and EPEC does not C.EPEC rearranges host cell actin and EHEC does not D.EPEC passes through the placenta to infect the fetus and EHEC does not
Last Answer : A.EHEC secretes a Shiga-like toxin and EPEC does not
Description : Which of the phage types of Mycobacterium tuberculosis occurs most frequently in India? A.Type A B.Type B C.Type C D.Type
Last Answer : D.Type
Description : Which of the following type of recombination does not require homologous sequences and isutilized by mobile genetic elements that move about chromosomes? A.Mutagenicrecombimation B.Site-specific recombination C.Replicative recombination D.General recombination
Last Answer : C.Replicative recombination
Description : Which type of interferon is produced by T lymphocytes? A.α B.β C.γ D. and γ β
Last Answer : .γ
Description : Which of the following mediates Type I hypersensitivity reaction? A- IgE B- IgG C- IgM D- IgD
Last Answer : IgE
Description : Which type of genomics studies the transcripts and proteins expressed by a genome? A- Comparative genomics B- Structural genomics C- Proteo genomics D- Functional genomics
Last Answer : Functional genomics
Description : Which of the following statements is false regarding B cells? A- B cells can undergo class switching and produce a different antibody type B- B one marrow stem cells migrate to the thymus and ... D- B cells that recognize high concentrations of antigens (self) in the absence of other signals
Last Answer : B one marrow stem cells migrate to the thymus and develop into B cells
Description : Polymorphonuclear leukocytes (or PMNs) A- can be attracted to the site of an infection following activation of complement B- are derived from bone marrow stem cells C- are a type of phagocyte that can engulf and kill bacteria D- .all of the above
Last Answer : .all of the above
Description : The type of recombination that commonly occurs between a pair of homologous DNA sequences is, A- mutagenic recombination B- site-specific recombination C- replicative recombination D- general recombination
Last Answer : general recombination
Description : Which of the following type of recombination does not require homologous sequences and isimportant for the integration of viral genomes into bacterial chromosomes? A- Mutagenic recombimation B- Site-specific recombination C- Replicative recombination D- General recombination
Last Answer : Site-specific recombination
Description : Which type of plasmid can exist with or without being integrated into the host's chromosome? A- Medisome B- Lisosome C- Lysogen D- Episome
Last Answer : D- Episome
Description : Which cell type is considered to have the oldest ancestor? A- Archaea B- Bacteria C- Eukarya D-they all share the same ancestor
Last Answer : they all share the same ancestor
Description : Which cell type is considered to have the oldest ancestor? A- Archaea B- Bacteria C- Eukarya D- they all share the same ancestor
Description : Evolutionary relationships between groups of organisms are determined using which of Thefollowing type of information? A- Comparisons of nucleotide sequences B- .Comparisons of biochemical pathways C- Comparisons of structural features D- All of the above
Last Answer : All of the above
Description : In what type of chemical reaction are the products of water removed during the formation of covalent bonds? a. Hydrolysis b. Ionization c. Dehydration synthesis d. Decomposition
Last Answer : c. Dehydration synthesis
Description : Peptone water and nutrient broth are - - - - - - - type of media A Basal media B Specialized media C Deferential media D Enriched media
Last Answer : A Basal media