Description : The mechanism of dehydration of an alcohol to give an ether involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes
Last Answer : Carbonium ions
Description : The mechanism of dehydration of an alcohol to give an alkene involves formation of : (a) Carbonium ions (b) Carbanions (c) Free radicals (d) Carbenes
Description : Which of the following statement(s) is/are true concerning ischemia reperfusion injury? a. During ischemia, ATP degradation results in increased plasma and intracellular levels of ... immunization with antibodies to neutrophil adhesive complex lessen the ischemic/reperfusion microvascular injury
Last Answer : Answer: a, b, c, d During the ischemia and hypoperfusion phase, degradation of ATP stores essential to maintain cell integrity and significant loss of diffusible ... either the neutrophil adhesive complex or the endothelial selectins dramatically lessens ischemia/reperfusion microvascular injury
Description : Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by __________, which decompose to give free radicals. (A) Organic peroxides (B) Sulphuric acid (C) Hydrofluoric acid (D) None of these
Last Answer : (A) Organic peroxides
Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane
Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical
Description : (A) Singlet carbenes have opposite spin (antiparallel). (R) They have a bent structure.
Last Answer : (A) Singlet carbenes have opposite spin (antiparallel). (R) They have a bent structure. A. If both (A) ... D. IF (A) is incorrect but (R) is correct.
Description : colors of the pixels in a digital image are often represented by red, green, and blue values between 0 and 255 (an RGB triplet). A photographer is manipulating a digital image ... using on the digital image? A. Lossless transformation B. Lossy transformation C. Multiband transformation
Last Answer : A. Lossless transformation
Description : The reaction intermediate carbenes are produced from"
Last Answer : The reaction intermediate carbenes are produced from" A. diazo methane B. ketene C. `CHCl_(3)//C_(2)H_(5)ONa` D. all of these
Description : (A) Allyl free radical is more stable than simple alkyl free radical. (R) The allyl free radical is stabilized by resonance.
Last Answer : (A) Allyl free radical is more stable than simple alkyl free radical. (R) The allyl free radical is ... IF (A) is incorrect but (R) is correct.
Last Answer : All the elements that have two (2) components are called divalent elements. Such as oxygen.
Description : Divalent cations are generally eliminated in marine fishes through
Last Answer : Divalent cations are generally eliminated in marine fishes through A. Gill membrane B. Anal membrane C. Fecal matter D. Oral membrane
Description : Oxygen is always divalent while sulphur can form 2, 4 and 6 bonds because
Last Answer : Oxygen is always divalent while sulphur can form 2, 4 and 6 bonds because A. High ... Vacant d-orbitals in the valency shell of Sulphur
Description : All the following statements regarding calcium are correct except (A) It diffuses as a divalent cation (B) It freely diffuses across the endoplasmic reticulum of muscle cells (C) It can exist in the blood as ionic form and also protein bound (D) It is found in high concentration in bones
Last Answer : Answer : B
Description : Various fungi are known to accumulate considerable quantities of divalent metals, e.g. (a) Cd (b) Zn (d) All of these (c) Pb
Last Answer : Ans. ((d))
Description : Semiconductor germanium and silicon are (a) Pentavalent (b) trivalent (c) divalent (d) tetravalent
Last Answer : (d) tetravalent
Description : In n type semi conductor added impurity is (A) pentavalent. (B) divalent. (C) tetravalent. (D) trivalent.
Last Answer : (A) pentavalent.
Description : Are "mines" a fitting metaphor for "free radicals"?
Last Answer : I would think of free radicals as a rusting of the body.
Description : Arrange the following free radicals in increasing order of stability:
Last Answer : Arrange the following free radicals in increasing order of stability:
Description : Arrange the following free radicals in order of decreasing stability: Methyl(I), Vinly(II), Allyl(III), Benzyl(IV)
Last Answer : Arrange the following free radicals in order of decreasing stability: Methyl(I), Vinly(II), Allyl(III), Benzyl(IV) ... gt III D. IV gt III gt I gt II
Description : The increasing order of stability of the following free radicals is :
Last Answer : The increasing order of stability of the following free radicals is : A. `(CH_(3))_(2)overset(.)CHlt(CH_(3)) ... (.)Clt(C_(6)H_(5))_(2)overset(.)CH`
Description : Due to the presence of an unpaired electron, free radicals are:
Last Answer : Due to the presence of an unpaired electron, free radicals are: A. chemically reactive B. chemically inactive C. anions D. cations
Description : Which of the following orders regarding relative stability of free radicals is correct?
Last Answer : Which of the following orders regarding relative stability of free radicals is correct? A. `3^(@)lt2^(@)lt1^(@)` B. ... (@)` D. `3^(@)gt2^(@)lt1^(@)`
Description : Answer: a, b, c, d Free oxygen radicals are chemical species that are intermediates in the normal process of cellular respiration. Oxidants that are free radicals have been implicated as initiators of ... a. C-reactive protein b. Serum amyloid c. a -Proteinase inhibitor d. Fibrinogen e. Albumin
Last Answer : Answer: a, b, c, d The acute-phase response is a series of homeostatic responses of the organism to tissue injury in infection and inflammation. After an inflammatory stimulus occurs, a number ... 30% to 50% of the level before injury. The reason for the decrease in production is poorly understood
Description : Antioxidants help a person maintain good health because they (a) prevent the vitamins deficiency. (b) prevent excessive oxidation of glucose and other carbohydrates. (c) neutralise the free radicals ... metabolism. (d) activate certain genes in the body cells which help delay the ageing process.
Last Answer : Ans:(c)
Description : Hydrogen and chlorine react vigorously in the presence of light (explosively) due to the formation of (a) Hydrogen-free radicals (b) Chlorine-free radicals (c) Hydrogen chloride molecule (d) Both hydrogen- and chlorine-free radicals
Last Answer : Ans:(b)
Description : Fermentation is a process of decomposition of an organic compound by (1) catalysts (2) enzymes (3) carbanions (4) free radicals
Last Answer : (2) enzymes Explanation: Fermentation in food processing typically is the conversion of carbohydrates to alcohols and carbon dioxide or organic acids using yeasts, bacteria, or a combination there ... to lactic acid. Alcoholic fermentation follows the same enzymatic pathway for the first 10 steps.
Description : H2O2 is precursor of A A. free radicals B. Enzyme C. Both D. None of these
Last Answer : free radicals
Description : Cell membrane damage can occur by C A. free radicals B. Phopholipase C. all of above D. None of these
Last Answer : all of above
Description : Characteristic reactions of aromatic hydrocarbons are initiated by (a) Electrophiles (b) Nucleophiles (c) Free radicals (d) Uncharged molecules
Last Answer : Electrophiles
Description : An aqueous solution of glycine is neutral because of the formation of : (a) Carbanion (b) Zwitterion (c) Carbonium ions (d) Free radicals
Last Answer : Zwitterion
Description : In the chlorination of alkanes, the first step in which chlorine free radicals are produced is called : (a) initiation (b) activation (c) propagation (d) deactivation
Last Answer : initiation
Description : Homolytic fission of covalent bond between carbon atoms will produce : (a) Two carbonium ions (b) Two molecules (c) Free radicals (d) Carbonium ion and carbanion
Last Answer : Free radicals
Description : Homolytic fission of C–C bond leads to the formation of : (a) Free radicals (b) Carbonium ions (c) Carbanions (d) None of these
Description : When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases
Last Answer : ANSWER: X -- FREE RADICALS
Description : Fermentation is a process of decomposition of an organic compound by : (1) catalysts (2) enzymes (3) carbanions (4) free radicals
Last Answer : enzymes
Description : The apical meristem of the root is present (a) only in radicals (b) only in tap roots (c) only in adventitious roots (d) in all the roots.
Last Answer : (d) in all the roots.
Description : do triplet lilies naturalize
Last Answer : Need Answer
Description : What is a triplet code? -Biology
Last Answer : answer:
Description : Why codon is triplet? -Biology
Description : In web design, what is the hex triplet of purdle?
Last Answer : In web design, what is the hex triplet of purple?
Description : Can you please advise me? Thank you
Last Answer : It's fairly well described here. http://cs.wikipedia.org/wiki/Troj%C4%8Dlenka
Description : The term triplet genetic code were coined by
Last Answer : The term triplet genetic code were coined by A. Watson and Crick B. Nirenberg C. Gamow D. Conrat
Description : First triplet codon to be deciphered was
Last Answer : First triplet codon to be deciphered was A. UUU B. AAA C. CTA D. CCC
Description : Number of of codons in a genetic triplet code is
Last Answer : Number of of codons in a genetic triplet code is A. 4 B. 16 C. 32 D. 64
Description : Triplet sequence in t-RNA
Last Answer : Ans. Anticodon
Description : Triplet sequence found in mRNA which codes for single amino acid
Last Answer : Ans. Codon
Description : Following are the characteristic of genetic code (a) It is triplet (b) It is universal (c) It is non-overlapping (d) It is ambiguous
Last Answer : Ans:(a)