Description : In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by A- conjugal transfer by a self-transmissible plasmid B- generalized phage transduction C- natural transformation D- none of the above
Last Answer : natural transformation
Description : DNA fragments upto 45 kilobases in size can be cloned in (A) Bacterial plasmids (B) Lambda phage (C) Cosmids (D) Yeast artificial chromosomes
Last Answer : Answer : C
Description : A is NOT associated with specialized transduction. a. Virulent Phage b. Lysogenic Cycle c. Prophage d. Recipient Cell
Last Answer : a. Virulent Phage
Description : A cosmid is a (A) Large bacterial plasmid (B) Viral plasmid (C) Hybrid of plasmid and phage (D) Yeast plasmid
Description : Which of the following may be used as a cloning vector? (A) Prokaryotic plasmid(B) Lambda phage (C) Cosmid (D) All of these
Last Answer : Answer : D
Description : Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes? (a) Retrovirus (b) Ti plasmid (c) λ phage (d) pBR322
Last Answer : (a) Retrovirus
Description : Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes ? (1) Retrovirus (2) Ti plasmid (3) phage (4) pBR 322
Last Answer : (1) Retrovirus
Description : All of the following subserve as intracellular second messengers in receptor mediated signal transduction except: A. Cyclic AMP B. Inositol trisphosphate C. Diacyl glycerols D. G proteins
Last Answer : D. G proteins
Description : Multiple antibiotic resistance is mediated by a. Episome b. Plasmid c. Colplasmid d. Both b and c
Last Answer : Ans: B
Description : The most important mechanism of bacterial resistance to an aminoglycoside antibiotic is (a) Plasmid mediated acquisition of aminoglycoside conjugating enzyme (b) Mutational acquisition of aminoglycoside ... affinity of ribosomal protein for the antibiotic (d) Mutational loss of porin channels
Last Answer : Ans: A
Description : The plasmid-mediated properties is/are A.fermentation of lactose B.production of enterotoxin C.resistance to antibiotics D.all of these
Last Answer : D.all of these
Description : The plasmid-mediated properties is/are A- fermentation of lactose B- production of enterotoxin C- resistance to antibiotics D- all of these
Last Answer : all of these
Description : The most important mechanism of bacterial resistance to an aminoglycoside antibiotic is: A. Plasmid mediated acquisition of aminoglycoside conjugating enzyme B. Mutational acquisition of aminoglycoside ... affinity of ribosomal protein for the antibiotic D. Mutational loss of porin channels
Last Answer : A. Plasmid mediated acquisition of aminoglycoside conjugating enzyme
Description : All of the following may be used as expression vectors except (A) Plasmid (B) Bacteriophage (C) Baculovirus (D) E. coli
Description : Which one of the following vectors is used to replace the defective gene in gene therapy? (a) Adenovirus (b) Cosmid (c) Ri plasmid (d) Ti plasmid
Last Answer : (a) Adenovirus
Description : In genetic engineering, a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (i-iv) in this regard and select the correct option about which one or more of these ... ii) and (iv) (b) (i) only (c) (i) and (iii) (d) (ii) and (iv)
Last Answer : (d) (ii) and (iv)
Description : If we somehow mix the genes of a corona-immune creature and a phage and make it attack a virus instead of a bacteria then it sall be a cure won't it please tell me if there is any hole in my plan.-Nithesh.K?
Last Answer : *shall and no question mark at the end..
Description : A plaque is a a. Change In Cell Structure Due To Viral Infection. b. Viral Cell Inclusion. c. Clear Zone Within A Lawn Of Bacteria. d. Cellular Aggregation Of Phage Heads.
Last Answer : c. Clear Zone Within A Lawn Of Bacteria.
Description : Competence refers to a bacterial cell's ability to a. Take Up DNA Fragments From The Environment. b. Be Infected By A Transducing Phage. c. Produce A Protein Product From An Engineered Gene. d. Undergo Conjugation With An F+ Cell.
Last Answer : a. Take Up DNA Fragments From The Environment.
Description : The bacteria in a colony are unable to perform transduction. How would this hurt the bacterial colony's chance for survival?
Last Answer : The bacteria would generally be more similar
Description : Of the following which is the most important mechanism of concurrent acquisition of multidrug resistance among bacteria ? (a) Mutation (b) Conjugation (c) Transduction (d) Transformation
Description : Genetic engineering is possible, because (a) we can cut DNA at specific sites by endonucleases like DNase I (b) restriction endonucleases purified from bacteria can be used in vitro (c) the phenomenon of transduction in bacteria is well understood (d) we can see DNA by electron microscope
Last Answer : (b) restriction endonucleases purified from bacteria can be used in vitro
Description : Which statement is correct for bacterial transduction? (a) Transfer of some genes from one bacteria to another bacteria through virus. (b) Transfer of genes from one bacteria to another bacteria ... its DNA directly from mother cell. (d) Bacteria obtained DNA from other external source.
Last Answer : (a) Transfer of some genes from one bacteria to another bacteria through virus.
Last Answer : (a) Transfer of some genes from one bacteria to another bacteria through virus
Description : Which of the following transport bacterial DNA to other bacteria via bacteriophages? A- Conjugation B- Transduction C- Transformation D- Translation
Last Answer : Transduction
Description : The most important mechanism of concurrent acquisition of multidrug resistance among bacteria is: A. Mutation B. Conjugation C. Transduction D. Transformation
Last Answer : B. Conjugation
Description : What are cosmids? -Biology
Last Answer : answer:
Description : F factor plasmids play a major role in A.conjugation B.replication C.transduction D.trasnscription
Last Answer : A.conjugation
Last Answer : conjugation
Description : Why do bacteria have plasmid? -Biology
Description : What are the sex organs provided in some bacteria? (a) Sex pili (b) Plasmid (c) Circular DNA (d) Gametes
Last Answer : (a) Sex pili
Description : n bacteria, plasmid is (a) extra chromosomal material (b) main DNA (c) non functional DNA (d) repetitive gene.
Last Answer : (a) extra chromosomal material
Description : In bacteria, plasmid is (a) extra chromosomal material (b) main DNA (c) non functional DNA (d) repetitive gene.
Description : The most important mechanism by which tetracycline antibiotics exert antiimicrobial action is (a) They chelate Ca2+ ions and alter permeability of bacterial cell membrane (b) They bind to 30S ribosomes ... peptide chain in the bacteria (d) They interfere with DNA mediated RNA synthesis in bacteria
Description : The main reason why antibodies could not solve all the problems of bacteria mediated disease is (a) decreased efficiency of the immune system (b) insensitivity of the individual ... development of mutant strains resistant to antibodies (d) inactivation of antibiotics by bacterial enzymes.
Last Answer : (c) development of mutant strains resistant to antibodies
Description : Aminoglycoside antibiotics exert the following action(s) on sensitive bacteria: A. Induce synthesis of defective proteins B. Make bacterial cell membrane more leaky C. Augment their own carrier mediated entry into the bacteria D. All of the above
Last Answer : D. All of the above
Description : The most important mechanism by which tetracycline antibiotics exert antimicrobial action is: A. They chelate Ca2+ ions and alter permeability of bacterial cell membrane B. They bind to 30S ribosomes ... peptide chain in the bacteria D. They interfere with DNA mediated RNA synthesis in bacteria
Last Answer : B. They bind to 30S ribosomes and inhibit bacterial protein synthesis
Description : A plasmid carries _____. a. Nonessential Genes b. Resistance Factors c. Genes For Toxins d. all the above
Last Answer : d. all the above
Description : he work done of vectors force F and distance d, separated by angle θ can be calculated using, a) Cross product b) Dot product c) Addition of two vectors d) Cannot be calculated
Last Answer : b) Dot product
Description : he primary mechanism by which heparin prevents coagulation of blood is: A. Direct inhibition of prothrombin to thrombin conversion B. Facilitation of antithrombin III mediated inhibition of factor Xa and ... of antithrombin III to inhibit factors IX and XI D. Inhibition of factors XIIa and XIIIa
Last Answer : B. Facilitation of antithrombin III mediated inhibition of factor Xa and thrombi
Description : What is a virulent phage? -Biology
Description : What is a phage vector? -Biology
Description : Lambda phage can be used to clone DNA fragments of the size (A) Upto 3 kilobases (B) Upto 20 kilobases (C) Upto 45 kilobases (D) Upto 1,000 kilobases
Last Answer : Answer : B
Description : Lac operon is a cluster of genes present in (A) Human beings (B) E. coli (C) Lambda phage (D) All of these
Description : Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D and select the right option about them. A B C D A B C ... fibres (c) Macrophage Collagen Fibroblast Mast cell fibres (d) Mast cell Collagen Fibroblast Macro- fibres phage
Last Answer : (a) Macrophage Fibroblast Collagen Mast fibres cel
Description : During the process of lysogeny _____. a. Phage DNA Integrates Into The Bacterial Chromosome. b. A Bacterium Acquires DNA From The External Environment. c. Competent Cells Receive Plasmids. d. New Phage Particles Are Assembled In The Host Bacterium.
Last Answer : a. Phage DNA Integrates Into The Bacterial Chromosome.
Description : Which phage always carries a small piece of E.coli genome? A.Lambda B.Mu C.T4 D.T3
Last Answer : B.Mu