Description : The following statement(s) is/are true concerning newer detection methods of systemic infection. a. Enzyme-linked immunosorbent assay (ELISA) is a rapid immunologic assay used for ... detected using advanced molecular techniques include cytomegalovirus (CMV) and human immunodeficiency virus (HIV)
Last Answer : Answer: a, b, c, d Although the classic detection of infection based on clinical signs of infection and bacterial culture remain the most common clinical tools, increasing ... including CMV and HIV. Furthermore, preliminary investigations into possible detection of fungal pathogens are underway
Description : One of the first enzymes synthesized by many bacteriophage is __________ , an RNA dependent RNA polymerase A.RNA transcriptase B.RNA polymerase C.RNA ligase D.RNA replicase
Last Answer : D.RNA replicase
Description : Bacteriophage was discovered by - (1) Felix d'Herelle and Frederick Twort (2) Kluyver and Niel (3) Paul Ehrlich (4) Burrill and Smith
Last Answer : (1) Felix d'Herelle and Frederick Twort Explanation: Bacteriophage refers to any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great ... 'Herelle in France (1917). D'Herelle coined the term Bacteriophage, meaning "bacteria eater:.
Description : Bacteriophage was discovered by (1) Felix d’Herelle and Frederick Twort (2) Kluyver and Niel (3) Paul Ehrlich (4) Burrill and Smith
Last Answer : Felix d’Herelle and Frederick Twort
Description : _____ are infectious RNA particles a. Viroids b. Prions c. Virions d. A-C are correct
Last Answer : a. Viroids
Description : .Mad cow disease in cattle is caused by an organism which has (a) inert crystalline structure (b) abnormally folded protein (c) free RNA without protein coat (d) free DNA without protein coat.
Last Answer : (b) abnormally folded protein
Description : .Which of the following is correct about viroids? (a) They have RNA with protein coat. (b) They have free RNA without protein coat. (c) They have DNA with protein coat. (d) They have free DNA without protein coa
Last Answer : (b) They have free RNA without protein coat.
Description : The genine of φ×174 bacteriophage is interesting in that if contains (A) No DNA (B) DNA with uracil (C) Single stranded DNA (D) Triple standard DNA
Last Answer : Answer : C
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 : Which of the following defines an open reading frame (ORF)? A- .A sequence of genome in bacteriophage B- The sequence of a complete genome C- A plasmid vector used in genome sequencing D- .A possible gene predicted by DNA sequencing
Last Answer : .A possible gene predicted by DNA sequencing
Description : n lysogeny, A- a bacteriophage transfers bacterial DNA B- bacteria take up double stranded DNA from the environment C- DNA-degrading enzymes in the extracellular medium would stop the process D- a bacteriophage genome is integrated into the bacterial genome
Last Answer : a bacteriophage genome is integrated into the bacterial genome
Description : Bacteriophage (pron: back-teer-e-o-faj) are: a) bacteria b) bacteria precursors c) viruses d) agents which cause the production of bacteria
Last Answer : ANSWER: C -- VIRUSES
Description : In the process of transcription, the flow of genetic information is from (A) DNA to DNA (B) DNA to protein (C) RNA to protein (D) DNA to RNA
Last Answer : Answer : D
Description : Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides
Description : DNA is (A) Usually present in tissues as a nucleo protein and cannot be separated from its protein component (B) A long chain polymer in which the internucleotide linkages are of the diester type between C-3 ... linkages are between C-2' and C-5' (D) Hydrolyzed by weal alkali (pH9 to 100°C)
Last Answer : Answer : B
Description : The genetic code operates through (A) The protein moiety of DNA (B) Cistrom of DNA (C) Nucleotide sequence of m RNA (D) The anticodons of tRNA
Description : From a DNA-RNA hybrid, DNA can be obtained by addition of (A) DNA B protein and ATP (B) Helicase and ATP (C) DNA topoisomerase I (D) Alkali
Description : Restriction endonucleases recognize and cut a certain sequence of (A) Single stranded DNA (B) Double stranded DNA (C) RNA (D) Protein
Description : Termination of the synthesis of the RNA molecule is signaled by a sequence in the template strand of the DNA molecule, a signal that is recognized by a termination protein, the (A) Rho (ρ) factor (B) σ factor (C) δ factor (D) ε factor
Last Answer : Answer : A
Description : The process through which the amount of DNA, RNA and protein can be known at a time is called (a) Autoradiography (b) Tissue culture (c) Cellular fractioning (d) Phase contrast microscopy
Last Answer : Ans. ((c))
Description : The process by which the amount of DNA, RNA and protein can be known at a time is: (a) Cell fractionation (b) Autoradiography (c) Phase-contrast microscopy (d) Tissue culture
Last Answer : Ans. ((b))
Description : Francis Crick’s seminal concept that in nature genetic information generally flows from DNA to RNA to protein.
Last Answer : Ans. Central Dogma
Description : An important step in protein synthesis is transcription. Which of the following statement(s) is/are true concerning this process? a. The first step in gene transcription involves separating the double helix ... nucleus to the cytoplasm d. Only one protein can be produced from an initial mRNA strand
Last Answer : Answer: c Transcription of a gene begins at an initiation site associated with a specific DNA sequence, termed a promoter region. After binding to DNA, the RNA polymerase opens up a short ... different proteins from the same gene. mRNA is exported from the nucleus only after processing is complete
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
Last Answer : Ans: B
Description : Chromosomes are made up of – (1) DNA (2) Protein (3) DNA and Protein (4) RNA
Last Answer : (3) DNA and Protein Explanation: Each chromosome is made up of DNA tightly coiled many times around proteins called his tones that support its structure.
Description : Transcription means the synthesis of – (1) Lipids (2) Protein (3) DNA (4) RNA
Last Answer : (3) DNA Explanation: Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA by the enzyme, RNA polymerase. During transcription, a DNA sequence is read by an RNA polymerase, which produces a complementary, anti-parallel RNA strand.
Description : Chromosomes are made up of (1) DNA (2) Protein (3) DNA and Protein (4) RNA
Last Answer : (3) DNA and Protein Explanation: Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Description : Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produces (in the host cells) (a) both sense and anti-sense RNA (b) a particular hormone (c) an antifeedant (d) a toxic protein.
Last Answer : a) both sense and anti-sense RNA
Description : Human immuno deficiency virus (HIV) has a protein coat and a genetic material which is (a) double stranded RNA (b) double stranded DNA (c) single stranded DNA (d) single stranded RNA
Last Answer : (d) single stranded RNA.
Description : The process of translation is (a) ribosome synthesis (b) protein synthesis (c) DNA synthesis (d) RNA synthesis.
Last Answer : (c) DNA synthesis
Description : .After a mutation at a genetic locus the character of an organism changes due to change in (a) protein structure (b) DNA replication (c) protein synthesis pattern (d) RNA transcription pattern.
Last Answer : (d) RNA transcription pattern.
Description : Telomerase is an enzyme which is a (a) simple protein (b) RNA (c) ribonucleoprotein (d) repetitive DNA
Last Answer : (c) ribonucleoprotein
Description : The process of translation is (a) ribosome synthesis (b) protein synthesis (c) DNA synthesis (d) RNA synthesis
Last Answer : (b) protein synthesis
Description : After a mutation at a genetic locus the character of an organism changes due to change in (a) protein structure (b) DNA replication (c) protein synthesis pattern (d) RNA transcription pattern.
Last Answer : a) protein structure
Description : Plants, protein, RNA, DNA contents are increased by a. Auxins b. Adenine c. Cytokinins d. None of above
Last Answer : Cytokinins
Description : The Nissl’s granules of nerves cell are made up of (a) DNA (b) RNA (c) ribosome (d) protein.
Last Answer : (c) ribosome
Description : .Balbiani rings (puffs) are sites of (a) DNA replication (b) RNA and protein synthesis (c) synthesis of polysaccharides (d) synthesis of lipids.
Last Answer : (b) RNA and protein synthesis
Description : .Viruses possess (a) ribosomes to synthesize protein (b) organelle for its vital mechanism (c) either DNA or RNA (d) none of these.
Last Answer : (c) either DNA or RNA
Description : Viruses have (a) DNA enclosed in a protein coat (b) prokaryotic nucleus (c) single chromosome (d) both DNA and RNA.
Last Answer : (a) DNA enclosed in a protein coat
Description : .Viroids differ from viruses in having (a) DNA molecules without protein coat (b) RNA molecules with protein coat (c) RNA molecules without protein coat (d) DNA molecules with protein coat
Last Answer : (c) RNA molecules without protein coat
Description : Vancomycin inhibits _____________ synthesis. a. protein b. DNA c. bacterial cell wall d. RNA
Last Answer : c. bacterial cell wall
Description : The genome of a virus may contain either ______ or ______. a. DNA; protein b. protein; carbohydrate c. carbohydrate; RNA d. RNA; DNA
Last Answer : d. RNA; DNA
Description : Negative regulation of protein synthesis is accomplished by A- allosteric inhibition B- the binding of RNA polymerase to the promoter C- the binding of a repressor to the DNA D- the binding of a repressor to the RNA polymerase
Last Answer : the binding of a repressor to the DNA
Description : The antiviral action of amantadine is exerted through: A. Interaction with the viral M2 protein B. Interaction with a virus directed thymidine kinase C. Inhibition of a viral protease enzyme D. Inhibition of viral RNA mediated DNA synthesi
Last Answer : A. Interaction with the viral M2 protein
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 : Viroids differ from viruses in having; (1) DNA molecules without protein coat (2) RNA molecules with protein coat (3) RNA molecules without protein coat (4) DNA molecules with protein coat
Last Answer : (3) RNA molecules without protein coat
Description : Ribosomes are chemically composed of (A) Protein (B) Only DNA (C) RNA (D) Both A + C
Last Answer : (D) Both A + C