Which amino acid is optically inactive?

1 Answer

Answer :

Glycine.

Related questions

Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Last Answer : Answer : A

Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Last Answer : (A) Glycine

Description : meso-Tartaric acid is (a) sometimes optically active (b) always optically active (c) sometimes optically inactive (d) always optically inactive

Last Answer : always optically inactive

Description : The amino acid which is not optically active is (A) Alanine (B) Glycine (C) Glutamine (D) Lysine

Last Answer : Answer : B

Description : Statement-1: The geometrical isomers of the complex `[M(NH_(4))_(4)Cl_(2)]` are optically inactive, and Statement-2: Both geometrical isomers of the c

Last Answer : Statement-1: The geometrical isomers of the complex `[M(NH_(4))_(4)Cl_(2)]` are optically inactive, ... D. Statement-1 is false, statement-2 is true.

Description : Which of the following is/are optically inactive? (a) a 50-50 mixture of R and S enantiomers (b) a meso compound (c) a racemic mixture (d) all the above

Last Answer : all the above

Description : Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive

Last Answer : A mixture of achiral compounds will be optically inactive

Description : A meso compound : (a) is an achiral molecule which contains chiral carbons (b) contains a plane of symmetry or a centre of symmetry (c) is optically inactive (d) is characterized by all of the above

Last Answer : ) is characterized by all of the above

Description : Which of the following is optically inactive? a. equimolar mixture of enantiomers b. Solution of pure enantiomer c. Mixture of enantiomers with enantiomeric excess of one isomer d. Molecule without symmetry elements

Last Answer : a. equimolar mixture of enantiomers

Description : All the following amino acids are optically active except (A) Tryptophane (B) Phenylalanine (C) Valine (D) Glycine

Last Answer : Answer : D

Description : All amino acids are optically active except (A) Glycine (B) Serine (C) Threonine (D) Tryptophan

Last Answer : Answer : A

Description : Inactive zymogens are precursors of all the following gastrointestinal enzymes except (A) Carboxypeptidase (B) Pepsin (C) Amino peptidase (D) Chymotrypsin

Last Answer : Answer : C

Description : The reference compound for absolute configuration of optically active compound is (A) Alanine (B) Lactic acid (C) Glyceraldehyde (D) Dihydroxy acetone

Last Answer : Answer : C

Description : Optically active compounds are capable of (A) Different reactions (B) Rotating plane of polarized light (C) Showing same chemical properties (D) None of these

Last Answer : Answer : B

Description : Total number of optically active stereoisomers of tartaric acid is

Last Answer : Total number of optically active stereoisomers of tartaric acid is A. 2 B. 4 C. 3 D. 0

Description : Which of the following compounds will be optically active? (a) Succinic acid (b) meso-Tartaric acid (d) Lactic acid (d) Chloroacetic acid

Last Answer : Lactic acid

Description : Which of the following compounds will be optically active? (a) Propanoic acid (b) 3-Chloropropanoic acid (c) 2-Chloropropanoic acid (d) 3-Chloropropene

Last Answer : 2-Chloropropanoic acid

Description : The percentage of inactive precursors (monoidotyrosine and diiodotyrosine) in thyroglobulin is (A) 30 (B) 40 (C) 50 (D) 70

Last Answer : Answer : D

Description : All the following statements about acetyl CoA carboxylase are true except (A) It is required for de novo synthesis of fatty acids (B) It is required for mitochondrial elongation of fatty acids ( ... for microsomal elongation of fatty acids (D) Insulin converts its inactive form into its active form

Last Answer : Answer : B

Description : All the following statements about acetyl CoA carboxylase are true except: (A) It is activated by citrate (B) It is inhibited by palmitoyl CoA (C) It can undergo covalent modification (D) Its dephosphorylated form is inactive

Last Answer : Answer : D

Description : Inactive precursors of enzymes are known as (A) Apoenzymes (B) Coenzymes (C) Proenzymes (D) Holoenzymes

Last Answer : Answer : C

Description : Enzymes, which are produced in inactive form in the living cells, are called (A) Papain (B) Lysozymes (C) Apoenzymes (D) Proenzymes

Last Answer : Answer : D

Description : The free fatty acids in blood are (A) Stored in fat depots (B) Mainly bound to β-lipoproteins (C) Mainly bound to serum albumin (D) Metabolically most inactive

Last Answer : Answer : C

Description : In I-cell disease, lysosomal enzymes (A) Are not synthesised (B) Are inactive (C) Lack signal sequence (D) Cannot reach lysosomes

Last Answer : Answer : B

Description : Pentagastrin is a (A) Naturally occurring form of gastrin (B) Inactive metabolite of gastrin (C) Active metabolite of gastrin (D) Synthetic form of gastrin

Last Answer : Answer : D

Description : Reactivation of inactive liver phosphorylase is normally favoured by (A) Insulin (B) Epinephrine (C) ACTH (D) Glucagon

Last Answer : D

Description : Adrenaline is inactive orally because it is: A. Not absorbed from the gastrointestinal tract B. Destroyed by gastric acid C. Completely metabolized in the intestinal mucosa and liver before reaching systemic circulation D. Taken up by adrenergic nerve endings of the intestinal wall, liver and lungs

Last Answer : C. Completely metabolized in the intestinal mucosa and liver before reaching systemic circulation

Description : Adrenaline is inactive orally because it is: A. Not absorbed from the gastrointestinal tract B. Destroyed by gastric acid C. Completely metabolized in the intestinal mucosa and liver before reaching systemic circulation D. Taken up by adrenergic nerve endings of the intestinal wall, liver and lungs

Last Answer : C. Completely metabolized in the intestinal mucosa and liver before reaching systemic circulation

Description : I plan to renovate the bathroom, it is not very big, it is rather small 250x150cm, I want to put a darker floor and a light tile there. The tile is called a large-format 60x30, do you think it will increase it optically, or rather reduce it? (sun)

Last Answer : I think it mainly increases the light color but yes, large (bright) areas that increase worse is that large tiles on a small area come out clearly cut off, it can look stupid this way you come out on that ... wall two and a half - or one and two three-quarters - which still goes, he wants to draw it

Description : Total number of optically active stereoisomers of `CH_(3)-underset(overset(|)(CI))(C)H-CH=CH-underset(overset(|)(CI))(C)H-CH_(3)` are :

Last Answer : Total number of optically active stereoisomers of `CH_(3)-underset(overset(|)(CI))(C)H-CH=CH-underset(overset(|)(CI))(C)H-CH_(3)` are :

Description : Total number of optically stereoisomers of `CH_(3)-underset(overset(|)(CI))(C)H-underset(overset(|)(CI))(C)H-underset(overset(|)(CI))(C)H-CH_(3)`

Last Answer : Total number of optically stereoisomers of `CH_(3)-underset(overset(|)(CI))(C)H-underset(overset(|)(CI))(C)H-underset( ... CH_(3)` A. 2 B. 4 C. 6 D. 8

Description : Which of the following amine is optically active?1

Last Answer : Which of the following amine is optically active?1 A. `CH_(3)NH_(2)` B. `CH_(3)NHC_(2)H_(5)` C. D. sec-Butylamine

Description : Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, `3^(@)` optically inative alcohol. Find out s

Last Answer : Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, ` ... out structures of amines: A. B. C. D.

Description : Statement-I: Optically active 2-idoibutane on treatment with `NaI` in acetone undergoes racemisation. Because Statement-II: Repeated Walden inversions

Last Answer : Statement-I: Optically active 2-idoibutane on treatment with `NaI` in acetone undergoes racemisation. ... Statement-1 is false, Statement-2 is true

Description : An optically plane surface reflects a beam of light – (1) as a parallel beam in one direction (2) as diffused beams in all d rections (3) as parallel beams in all direactions (4) as a diffused beam in one direction

Last Answer : (1) as a parallel beam in one direction Explanation: An optically plane surface reflects a beam of light as a parallel beam in one direction. The set of incident rays are reflected as a set ... its reflecting surface is smooth. This type of reflection of a set of rays is called Specular Reflection.

Description : Petroleum (A) Is optically active (B) Constitutes mainly of olefins (C) Does not contain asphalt (D) Does not contain aromatics

Last Answer : (A) Is optically active

Description : Which of the following statements is false about glyceraldehyde? (a) Its IUPAC name is 1,2-dihydroxypropanal (b) It is isomeric with 1,3-dihydroxypropanone (c) It is optically active (d) It shows mutarotation

Last Answer : It shows mutarotation

Description : On reduction with LiAlH4, which of the following compounds could yield an optically active compound? (a) Propanal (b) Propanone (c) Butanal (d) Butanone

Last Answer : Butanone

Description : 2-Butanol is optically active because it contains : (a) an asymmetric carbon (b) a plane of symmetry (c) a hydroxyl group (d) a centre of symmetry

Last Answer : (a) an asymmetric carbon

Description : Enantiomers have which of the following characteristics? (a) rotate ordinary light (b) have the same melting point (c) are superimposable mirror images (d) react with optically active molecules at the same rate

Last Answer : have the same melting point

Description : An optically active compound (a) must contain atleast four carbons (b) when in solution rotate the plane of polarized light (c) must always contain an asymmetric carbon atom (d) in solution always give a negative reading in polarimeter

Last Answer : when in solution rotate the plane of polarized light

Description : The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of A.300-400nm B.400-500nm C.500-600nm D.600-700nm

Last Answer : D.600-700nm

Description : Pick up the correct statement from the following: (A) A refracting telescope consists optically of two lenses (B) The principal axes of both the lenses coincide the optical axis of the telescope (C) The lens nearer the object to be viewed is convex and is called objective (D) All the above

Last Answer : (D) All the above

Description : X-ray crystallographic analysis of an optically active compound determines its (A) Optical rotatory dispersive power (B) Absolute configuration (C) Relative configuration (D) Optical purity

Last Answer : (B) Absolute configuration

Description : The index of refraction measures the speed of light in an optical fiber. Will light travel faster in an optically dense material or in one that is less dense?

Last Answer : Light will travel faster in an optical material that is less dense.

Description : A diffraction grating is optically equivalent to a multiple slit system in which the number of slit , N is typically A.2000/cm B.3000/cm C.5000/cm D.1000/cm

Last Answer : C.5000/cm

Description : When light enters an optically denser medium, the light ray: w) bends away from a normal to surface x) passes through unbent y) bends towards a normal to surface z) none of the above

Last Answer : ANSWER: Y -- BENDS TOWARDS A NORMAL TO SURFACE

Description : An optically plane surface reflects a beam of light (1) as a parallel beam in one direction (2) as diffused beams in all directions (3) as parallel beams in all directions (4) as a diffused beam in one direction

Last Answer : as a parallel beam in one direction

Description : How many high-energy phosphate bond equivalents are required for amino acid activation in protein synthesis? (A) One (B) Two (C) Three (D) Four

Last Answer : Answer : B

Description : In E. coli the chain initiating amino acid in protein synthesis is (A) N-formyl methionine(B) Methionine (C) Serine (D) Cysteine

Last Answer : Answer : A