Description : The gram-positive bacteria lack __________ structure/component? A.outer membrane B.murein C.teichoic acid D.plasma membrane
Last Answer : A.outer membrane
Description : Porins are located in A- the outer membrane of gram-negative bacteria B- he peptidoglycan layer of gram-positive bacteria C- the cytoplasmic membrane of both gram-negative and gram-positive bacteria D- the periplasmic space of gram-negative bacteria
Last Answer : the outer membrane of gram-negative bacteria
Description : Which of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm
Description : Which of the following may be most likely to be missing from a gram-positive bacterium? A.Penicillin binding protein B.Peptidoglycan C.Lipopolysaccharide D.Phospholipid bilayer membrane
Last Answer : C.Lipopolysaccharide
Description : Gram positive cells have a A- second outer membrane that helps to retain the crystal violet stain B- multiple layer of peptidoglycan that helps to retain the crystal violet stain C- .thick capsule that traps the crystal violet stain D- periplasmic space that traps the crystal violet
Last Answer : multiple layer of peptidoglycan that helps to retain the crystal violet stain
Description : The last step in synthesis of peptidoglycan is A- attachment of a peptide to muramic acid B- attaching two amino acids to form a cross-link C- attachment of a portion of peptidoglycan to a membrane lipid D- binding of penicillin to a membrane protein
Last Answer : attaching two amino acids to form a cross-link
Description : Peptidoglycan is also known as A- N-acetyl muramic acid B- mureinmucopeptide C- N acetylglucosamine D- mesodiaminopimetic acid
Last Answer : mureinmucopeptide
Description : Archeal cells usually do not contain peptidoglycan, rather contain pseudo- peptidoglycanwhichis mainly composed of A-.N-acetylmuramic acid and L-amino acids B-.N-acetylmuramic acid and D-amino acids C-.N-acetyltalosaminuronic acid and D-amino acids D-N-acetyltalosaminuronic acid and L-amino acids
Last Answer : N-acetyltalosaminuronic acid and L-amino acids
Description : Which of the following is not true for prokaryotic organism? A- Nucleus is not bounded by nuclear membrane B- Chromosomes does not contain histones C- 80S ribosomes are distributed in cytoplasm D- Cell wall contains peptidoglycan as one of the major component
Last Answer : 80S ribosomes are distributed in cytoplasm
Description : Gram-negative bacteria would stain_________ with the Gram stain and have _______in the wall. a. orange-red; Teichoic acid b. orange-red; lipopolysaccharide c. purple; peptidoglycan d. purple; Teichoic acid
Last Answer : c. purple; peptidoglycan
Description : Gram negative organisms are largely insensitive to benzyl penicillin because (a) They produce large quantities of penicillinase (b) They do not utilize D-alanine whose incorporation in the cell wall is ... lipoprotein-peptidoglycan multiplayer cell wall of gram-negative bacteria (d) Both (a) and (b)
Last Answer : Ans: C
Description : Gram negative organisms are largely insensitive to benzyl penicillin because: A. They produce large quantities of penicillinase B. They do not utilise D-alanine whose incorporation in the cell wall is inhibited ... multilayer cell wall of gram negative bacteria D. Both A' and B' are correct
Last Answer : . Benzyl penicillin is not able to penetrate deeper into the lipoprotein-peptidoglycan multilayer cell wall of gram negative bacteria
Description : Why is peptidoglycan a major structural protein divide bacterial into two major groups?
Last Answer : Feel Free to Answer
Description : The following examples are important heteropolysaccharides except (A) Amylopectin (B) Heparin (C) Peptidoglycan (D) Hyaluronic acid
Last Answer : A
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 : Penicillins interfere with bacterial cell wall synthesis by (a) Inhibiting synthesis of N-acetyl muramic acid pentapeptide (b) Inhibiting conjugation between N-acetyl muramic acid and N-acetyl ... link the peptidoglycan residues (d) Counterfeiting for D-alanine in the bacterial cell wall
Description : Select the wrong statement. (a) Bacterial cell wall is made up of peptidoglycan. (b) Pili and fimbriae are mainly involved in motility of bacterial cells. (c) Cyanobacteria lack flagellated cells. (d) Mycoplasma is a wall-less microorganism.
Last Answer : (b) Pili and fimbriae are mainly involved in motility of bacterial cells.
Description : One of the major components of cell wall of most fungi is (a) cellulose (b) hemicellulose (c) chitin (d) peptidoglycan.
Last Answer : (c) chitin
Description : The other name of invertase enzyme is A- sucrose B- saccharase C- isomerase D- both (a) and (b
Last Answer : both (a) and (b)
Description : Hashimoto disease and Graves‘ disease are similar in that both a. Affect the thyroid gland. b. Affect the red blood cells. c. Are forms of cellular hypersensitivity? d. Are accompanied by histamine release.
Last Answer : b. Affect the red blood cells.
Description : The fungal diseases histoplasmosis and blastomycosis both a. Occur in the United States. b. Affect the human brain and spinal cord. c. Are due to fungi that grow as a mycelium in the body. d. Are accompanied by the production of aflatoxins.
Last Answer : a. Occur in the United States.
Description : Both the ascus and the basidium a. Are formed by fungi in the mitosporic fungi. b. Are involved in coenocytic formation by fungi. c. Are diploid structures. d. Are produced during the sexual stage of fungal reproduction.
Last Answer : d. Are produced during the sexual stage of fungal reproduction.
Description : Rotavirus and the noroviruses can both be causes of viral ______ when transferred to humans by ______. a. meningitis; mosquitoes b. meningitis; water c. gastroenteritis; mosquitoes d. gastroenteritis; water
Last Answer : a. meningitis; mosquitoes
Description : The rapid plasma reagin test and VDRL test are both used _____. a. In The Diagnosis Of Syphilis. b. To Detect Toxic Shock Syndrome. c. To Gauge The Extent Of Dental Decay. d. To Distinguish Ureaplasmal And Mycoplasmal Urethritis.
Last Answer : a. In The Diagnosis Of Syphilis.
Description : Genomic islands are a. Gene Sequences Not Part Of The Chromosomal Genes. b. Adjacent Gene Sequences Unique To One Or A Few Strains In A Species. c. Acquired By HGT. d. Both B And C Are Correct.
Last Answer : d. Both B And C Are Correct.
Description : In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.
Last Answer : b. One parent strand is conserved in each of the the new dna.
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 : The promoter on an expression vector used to overproduce proteins in bacteria is A.a bacterial promoter B.expressed both in bacteria and mammalian cells C.not a regulated promoter D.the natural promoter of the gene being cloned
Last Answer : A.a bacterial promoter
Description : In DNA sequencing, the primer A.specifies where the sequence ends B.specifies where the sequence begins C.both (a) and (b) D.generates variety of different sized fragments
Last Answer : B.specifies where the sequence begins
Description : A characteristic of protein synthesis in both the archaea and eukarya is A.transcription and translation are coupled B.translation is inhibited by diphtheria toxin C.proteins are synthesized from D-, ... L-, isomers of amino acids D.the initiator tRNA is charged with N-formyl- methionine
Last Answer : C.proteins are synthesized from
Description : The cell wall of A.gram-positive bacteria are thicker than gram-negative bacteria B.gram-negative bacteria are thicker than gram-positive bacteria C.both have same thickness but composition is different D.none of these
Last Answer : A.gram-positive bacteria are thicker than gram-negative bacteria
Description : Amyloglucosidase is used in glucose production. It is produced by A.Rhizopusniveus B.Endomycopsisfibuliger C.Sclerotinalibertina D.both (a) and(b)
Last Answer : D.both (a) and(b)
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 : 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
Description : High acid foods with a pH above 5.3 are especially subjected to A- flat sour spoilage B- putrefaction C- both (a) and (b) D- TA spoilage
Description : Which of the following statement is correct? A- The size and sequence of introns can be deduced from the cDNA sequence B- Restriction endonuclease can cleave ss and dsDNA both C- Restriction ... sequenceof a gene D- Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Last Answer : Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Description : If the Keq for an enzymatic reaction is greater than 1, the reaction A- will be endergonic B- can not occur without the input of energy C- both (a) and (b) D- none of these
Last Answer : none of these
Description : Which of the following Ascomycetes are used for riboflavin production? A- Eremnotheciumashbyii B- Ashbyagossypii C- Candida guilliermondia D- Both (a) and (b)
Last Answer : Both (a) and (b)
Description : Negative phase is observed in A- secondary humoral response B- primary humoral response C- both (a) and (b) D- none of the above
Last Answer : secondary humoral response
Description : Entner-Doudoroff pathway is found in A-aerobic prokaryotes B- anaerobic prokaryotes C- both (a) and (b) D-aerobic eukaryotes
Description : During exponential growth, the growth rate isA-.number of generations per unit time B- reciprocal of generation time C- both (a) and D- none of these
Last Answer : reciprocal of generation tim
Description : Implicit factors A- .depend on developing microflora B- can be synergistic C- .both (a) and (b) D- .none of the above
Last Answer : .both (a) and (b)
Description : Amyloglucosidase is used in glucose production. It is produced by A- Rhizopusniveus B- Endomycopsisfibuliger C- Sclerotina libertine D- both (a) and
Last Answer : both (a) and
Description : Which of the following statement is correct? A- The size and sequence of introns can be deduced from the cDNA sequence B- .Restriction endonuclease can cleave ss and dsDNA both C- Restriction ... of a Gene D- Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
Description : CD8 surface antigen is present in A- cytotoxic T cells B- .suppresssor T cells C- both (a) and (b) D- none of these
Description : Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? A- By rearrangements of the DNA encoding the variable regions of the heavy ... proteins can physically change their shape to bind different epitopes D- Both (a) and (b)
Description : The term used for plasmids possessing both RTF and r determinants is A- non self-transmissible plasmids B- non conjugative plasmids C- conjugative plasmids D- none of the above
Last Answer : conjugative plasmids
Description : The main difference between a self-transmissible and a mobilizableplasmidis that the selftransmissible plasmid A- transfers both strands of the plasmid DNA B- carries genes encoding the mating apparatus C- transfers antibiotic resistance genes D- usually has a transposon inserted into it
Last Answer : carries genes encoding the mating apparatus
Description : Anaerobic degradation of proteins brought about by bacteria and fungi give the products like A- mercaptans and indole B-H2S C-both (a) and (b) D-None of these