Description : The enzyme which can add water to a carbon-carbon double bond or remove water to create a double bond without breaking the bond is (A) Hydratase (B) Hydroxylase (C) Hydrolase (D) Esterase
Last Answer : Answer : A
Description : In which of the following types of enzyme water may be added to a C—C double bond without breaking the bond? (A) Hydrolase (B) Hydratase (C) Hydroxylase (D) Esterase
Last Answer : Answer : B
Description : In which of the following types of enzymes, water may be added to a C—C double bond without breaking the bond? (A) Hydrolase (B) Hydratase (C) Hydroxylase (D) Oxygenase
Description : Human desaturase enzyme system cannot introduce a double bond in a fatty acid beyond (A) Carbon 9 (B) Carbon 6 (C) Carbon 5 (D) Carbon 3
Description : Why does a H+ ion attacking a carbon-carbon double bond add to the carbon with the least number of substituents? (a) the reaction is resonance stabilized. (b) the hybrid geometry favors this ... tends to attack stable centers of negative charge. (d) a more stable carbonium ion is generated.
Last Answer : a more stable carbonium ion is generated.
Description : All active prostaglandins have atleast one double bond between positions: (A) 7 and 8 (B) 9 and 10 (C) 11 and 12 (D) 13 and 14 FATS AND FATTY ACID METABOLISM 95
Description : ∆9 indicates a double bond between carbon atoms of the fatty acids: (A) 8 and 9 (B) 9 and 10 (C) 9 and 11 (D) 9 and 12
Description : All active prostaglandins have at least one double bond between positions (A) 7 and 8 (B) 10 and 11 (C) 13 and 14 (D) 16 and 17
Description : In double bond, how many sigma and Pi bonds are present in it ?
Last Answer : Double bond = 1 Sigma bond and one Pi bond Among sigma and Pi bonds which is the stronger one Sigma bond is Stronger than pi bond
Description : When palmitoleic acid (16 C, 1 double bond) is completely oxidised, what is the net generation of ATP molecules?
Last Answer : 127.
Description : In biotin-containing enzymes, the biotin is bound to the enzyme by (A) An amide linkage to carboxyl group of glutamine (B) A covalent bond with CO2 (C) An amide linkage to an amino group of lysine (D) An amide linkage to α-carboxyl group of protein
Last Answer : Answer : C
Description : The enzyme DNA ligase (A) Introduces superhelical twists (B) Connects the end of two DNA chains (C) Unwinds the double helix (D) Synthesises RNA primers
Description : Lineweaver – Burk double reciprocal plot is related to (A) Substrate concentration (B) Enzyme activity (C) Temperature (D) Both (A) and (B) ENZYMES 145
Last Answer : Answer : D
Description : (A) Heterolytic fission involves the breaking of a covalent bond in such a way that both the electrons of the shared pair are carried away by one of t
Last Answer : (A) Heterolytic fission involves the breaking of a covalent bond in such a way that both the electrons of ... IF (A) is incorrect but (R) is correct.
Description : What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor ... as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.
Last Answer : Silver nitrate solution is kept in brown bottles in laboratory because - (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it
Description : In given compounds how many have Z configuration along double bond ?
Last Answer : In given compounds how many have Z configuration along double bond ?
Description : Addition of `HI` on the double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product. This is because the addition proc
Last Answer : Addition of `HI` on the double bond of propene yields isopropyl iodide and not n-propyl iodide as the ... D. none of the above is a correct statement
Description : Assertion: The O - O bond lengths in ozone molecule are intermediate between single and double bonds. Reason: `O_(3)` molecule is a resonance hybrid.
Last Answer : Assertion: The O - O bond lengths in ozone molecule are intermediate between single and double bonds. ... I is not correct and Statement-II is correct
Description : What The double bond between carbon atom and two oxygen atoms has two characteristics what are they?
Last Answer : Four valence electrons are shared.Valence electrons are shared between oxygen atoms.
Description : A single covalent bond (a) Is formed by the transfer of two electrons (b) Exists between hydrogen and chlorine in an aqueous solution, of hydrochloric acid (c) Is longer than a double bond (d) Does not require energy to disrupt it unlike an ionic bond
Last Answer : Ans:(c)
Description : Hydrocarbon with double bond is?
Last Answer : Alkenes
Description : What is meant by restricted rotation around of carbon-carbon double bond? What type of isomerism does it lead to?
Last Answer : Ans. The carbon-carbon double bond in alkene contains one sigma bond and one pi-bond. The Pibond involves the overlapping of unhybridised p orbital of two carbon atom .The rotation around the ... , the free rotation around C=C double bond is restricted, which gives rise to Geometrical Isomerism.
Description : The unsaturated hydrocarbons having double bond between carbon atom are
Last Answer : alkene.
Description : Classify the following compounds containing double bond and triple bond – Ethyne, benzene, Butyne, pentene
Last Answer : Double bond: Benzene, pentene Triple bond: Ethyne, Butyne
Description : How is double bond formed in alkenes?
Last Answer : In alkenes, two hydrogen atoms are less when compared to the saturated hydrocarbons. The two of the carbon atoms in the molecule is joined together by two covalent bonds. Thus a double bond is formed.
Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane
Last Answer : Benzene
Description : Which statement about the structure of benzene is not true? (a) The two Kekule structures of benzene are in equilibrium. (b) The carbon-carbon bond lengths in benzene are greater than the carbon- ... (d) The stability of benzene ring is much greater than the stability of 1,3,5- cycloheptatriene
Last Answer : The two Kekule structures of benzene are in equilibrium
Description : What is the functional group in an alcohol? (a) Carbon-carbon double bond (b) NH2 (c) OH (d) COOH
Last Answer : OH
Description : Which brief statement most accurately describes why alkenes react the way they do? (a) C=C double bonds are weak. (b) A π bond is lost but a stronger σ bond is gained. (c) C=C double bonds are unstable. (d) C=C π bonds are attacked by nucleophiles.
Last Answer : A π bond is lost but a stronger σ bond is gained.
Description : How many electrons are involved in a carbon-carbon double bond? (a) 1 (b) 2 (c) 3 (d) 4
Last Answer : 4
Description : In the addition of HX to a double bond, the hydrogen goes to the carbon that already has more hydrogens is a statement of (a) Hund's rule (b) Markovnikov's rule (c) Huckel rule (d) Saytzeff rule
Last Answer : Markovnikov's rule
Description : In the reaction of ethylene with H2O in the presence of sulfuric acid, which one adds across the double bond first? (a) H+ (b) H. (c) HO– (d) sulfate ion
Last Answer : H+
Description : The carbon atoms involved in the double bond of an alkene are (a) sp hybridized (b) sp2 hybridized (c) sp3 hybridized (d) None of these
Last Answer : sp2 hybridized
Description : Alkenes show geometrical isomerism due to : (a) Asymmetry (b) Rotation around a single bond (c) Resonance (d) Restricted rotation around a double bond
Last Answer : Restricted rotation around a double bond
Description : The carbon-carbon bond lengths in rank of increasing bond length is : (a) triple, double, single (b) single, double, triple (c) single, triple, double (d) triple, single, double
Last Answer : triple, double, single
Description : What is the bond length of a carbon-carbon double bond? (a) 1.20 Å (b) 1.34 Å (c) 1.54 Å (d) 1.68 Å
Last Answer : 1.34 Å
Description : Carbon-carbon double bonds consist of : (a) one σ bond, one π bond (b) two σ bonds, one π bond (c) one σ bond, two π bonds (d) two σ bonds, two π bonds
Last Answer : one σ bond, one π bond
Description : Catenation is a property of the carbon atom which describes its ability to (a) bond with other carbon atoms (b) form double and triple bonds (c) exist in plant and animal form (d) form bonds in its ground state
Last Answer : bond with other carbon atoms
Description : In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as (A) English bond (B) Double Flemish bond (C) Zigzag bond (D) Single Flemish bond
Last Answer : Answer: Option B
Description : The type of bond provided in brick masonry for carrying heavy loads is (A) Single Flemish bond (B) Double Flemish bond (C) English bond (D) Zigzag bond
Last Answer : Answer: Option C
Description : Pick up the correct statement from the following: (A) English bond is used for brick masonry to support heavy loads (B) Double-Flemish bond is suitable for brick masonry to give uniform face ... The stretcher bond is used for the construction of half brick masonry brick (D) All the above
Last Answer : Answer: Option D
Description : As compared to English bond, double Flemish bond is (A) Stronger (B) More compact (C) Costly (D) None of these
Description : Single Flemish bond consists of (A) Double Flemish bond facing and English bond backing in each course (B) English bond facing and double Flemish bond backing in each course (C) Stretcher bond ... bond backing in each course (D) Double Flemish bond facing and header bond backing in each course
Last Answer : Answer: Option A
Description : Enamine contains ……. a. double bond and amino group b. double bond and alcohol c. dounle bond and amide d. Diamines
Last Answer : a. double bond and amino group
Description : What are alkenes having two double bonds separated by one single bond known as?
Last Answer : ANSWER: CONJUGATED DIENES
Description : In 2-butene, which of the following bonds prevents the atoms at each end of the bond from rotating with respect to each other. Is it an: w) ionic bond x) sigma bond y) strong bond z) double bond
Last Answer : ANSWER: Z -- DOUBLE BOND
Description : Which of the following compounds contains a double bond? w) butene x) acetylene y) butane z) propane
Last Answer : ANSWER: W -- BUTENE
Description : What enzyme catalyzes phosphodiester bond? -Biology
Last Answer : answer:
Description : What enzyme in saliva can break the chemical bond in starch?
Last Answer : Need answer