Isomers differing as a result of variations in configuration of the —OH and —H on carbon atoms 2, 3 and 4 of glucose are known as (A) Epimers (B) Anomers (C) Optical isomers (D) Steroisomers

Isomers differing as a result of variations in configuration of the —OH and —H on carbon atoms 2, 3 and 4 of glucose are known as (A) Epimers (B) Anomers (C) Optical isomers (D) Steroisomers
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Isomers differing as a result of variations in configuration of the —OH and —H on carbon atoms 2, 3 and 4 of glucose are known as (A) Epimers (B) Anomers (C) Optical isomers (D) Steroisomers

Description : Isomers differing as a result of variations in configuration of the —OH and —H on carbon atoms 2, 3 and 4 of glucose are known as (A) Epimers (B) Anomers (C) Optical isomers (D) Steroisomers

Last Answer : (A) Epimers

Compounds having the same structural formula but differing in spatial configuration are known as (A) Stereoisomers (B) Anomers (C) Optical isomers (D) Epimers

Description : Compounds having the same structural formula but differing in spatial configuration are known as (A) Stereoisomers (B) Anomers (C) Optical isomers (D) Epimers

Last Answer : A

Compounds having the same structural formula but differing in spatial configuration are known as (A) Stereoisomers (B) Anomers (C) Optical isomers (D) Epimers

Description : Compounds having the same structural formula but differing in spatial configuration are known as (A) Stereoisomers (B) Anomers (C) Optical isomers (D) Epimers

Last Answer : (A) Stereoisomers

Two sugars which differ from one another only in configuration around a single carbon atom are termed (A) Epimers (B) Anomers (C) Optical isomers (D) Stereoisomers

Description : Two sugars which differ from one another only in configuration around a single carbon atom are termed (A) Epimers (B) Anomers (C) Optical isomers (D) Stereoisomers

Last Answer : A

Two sugars which differ from one another only in configuration around a single carbon atom are termed (A) Epimers (B) Anomers (C) Optical isomers (D) Stereoisomers

Description : Two sugars which differ from one another only in configuration around a single carbon atom are termed (A) Epimers (B) Anomers (C) Optical isomers (D) Stereoisomers

Last Answer : (A) Epimers

In glucose the orientation of the —H and —OH groups around the carbon atom 5 adjacent to the terminal primary alcohol carbon determines (A) D or L series (B) Dextro or levorotatory (C) α and β anomers (D) Epimers

Description : In glucose the orientation of the —H and —OH groups around the carbon atom 5 adjacent to the terminal primary alcohol carbon determines (A) D or L series (B) Dextro or levorotatory (C) α and β anomers (D) Epimers

Last Answer : A

In glucose the orientation of the —H and —OH groups around the carbon atom 5 adjacent to the terminal primary alcohol carbon determines (A) D or L series (B) Dextro or levorotatory (C)  and  anomers (D) Epimers

Description : In glucose the orientation of the —H and —OH groups around the carbon atom 5 adjacent to the terminal primary alcohol carbon determines (A) D or L series (B) Dextro or levorotatory (C)  and  anomers (D) Epimers

Last Answer : (A) D or L series

α−D-Glucose and β−D-glucose are related by (A) Epimers (B) Anomers (C) Multirotation (D) Ketoenol pair

Description : α−D-Glucose and β−D-glucose are related by (A) Epimers (B) Anomers (C) Multirotation (D) Ketoenol pair

Last Answer : B

α-D-glucose and β -D-glucose are (A) Stereoisomers (B) Epimers (C) Anomers (D) Keto-aldo pairs

Description : α-D-glucose and β -D-glucose are (A) Stereoisomers (B) Epimers (C) Anomers (D) Keto-aldo pairs

Last Answer : C

What is the possible number of optical isomers for a compound containing 2 dissimilar asymmetric carbon atoms? (a) 2 (b) 4 (c) 6 (d) 8

Description : What is the possible number of optical isomers for a compound containing 2 dissimilar asymmetric carbon atoms? (a) 2 (b) 4 (c) 6 (d) 8

Last Answer : 4

What is the possible number of optical isomers for a compound containing n dissimilar asymmetric carbon atoms? (a) n2 (b) 2n (c) n + 1(d) n + 2

Description : What is the possible number of optical isomers for a compound containing n dissimilar asymmetric carbon atoms? (a) n2 (b) 2n (c) n + 1 (d) n + 2

Last Answer : 2n

Epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose

Description : Epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose

Last Answer : B

The epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose

Description : The epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose

Last Answer : B

α-D-Glucose is different from β-D-glucose (a) in the configuration at C-1 (b) because they are mirror images of each other (c) because they are enantiomers (d) because they are geometrical isomers

Description : α-D-Glucose is different from β-D-glucose (a) in the configuration at C-1 (b) because they are mirror images of each other (c) because they are enantiomers (d) because they are geometrical isomers

Last Answer : in the configuration at C-1

The carbon chain of fatty acids is shortened by 2 carbon atoms at a time. This involves successive reactions catalysed by 4-enzymes. These act the following order: (A) Acetyl CoA dehydrogenase, β-OH acyl CoA dehydrogenase, enoyl hydrase, thiolose (B) Acyl CoA dehydrogenase, thiolase, enoyl hydrase, β-OH acyl CoA dehydrogenase (C) Acyl CoA dehydrogenase, thiolose, enoyl hydrase, β-OH acyl CoA dehydrogenase (D) Enoyl hydrase, β-OH acyl CoA dehydrogenase, acyl CoA dehydrogenase, thiolose,

Description : The carbon chain of fatty acids is shortened by 2 carbon atoms at a time. This involves successive reactions catalysed by 4-enzymes. These act the following order: (A) Acetyl CoA dehydrogenase, ... CoA dehydrogenase (D) Enoyl hydrase, β-OH acyl CoA dehydrogenase, acyl CoA dehydrogenase, thiolose,

Last Answer : Answer : B

Optical isomers of all aminoacids exist except (A) Glycine (B) Arginine (C) Alanine (D) Hydroxy proline

Description : Optical isomers of all aminoacids exist except (A) Glycine (B) Arginine (C) Alanine (D) Hydroxy proline

Last Answer : Answer : A

Optical isomers that are mirror images and non superimposable are called (A) Diastereomers (B) Euantiomers (C) dl isomers (D) Stereomers

Description : Optical isomers that are mirror images and non superimposable are called (A) Diastereomers (B) Euantiomers (C) dl isomers (D) Stereomers

Last Answer : Answer : B

This amino acid cannot have optical isomers: (A) Alanine (B) Histidine (C) Threonine (D) Glycine

Description : This amino acid cannot have optical isomers: (A) Alanine (B) Histidine (C) Threonine (D) Glycine

Last Answer : Answer : D

Which of the following statements is not true about phospholipids? (a) They are similar to triacylglycerols except that the middle OH group of glycerol reacts with a phosphate rather than with a fatty acid. (b) They constitute a major component of cell membranes. (c) Phosphatidic acid is a phospholipid. (d) The C-2 carbon of glycerol in phosphoacylglycerols has the R configuration

Description : Which of the following statements is not true about phospholipids? (a) They are similar to triacylglycerols except that the middle OH group of glycerol reacts with a phosphate rather than with a ... is a phospholipid. (d) The C-2 carbon of glycerol in phosphoacylglycerols has the R configuration

Last Answer : They are similar to triacylglycerols except that the middle OH group of glycerol reacts with a phosphate rather than with a fatty acid

The number of isomers of glucose is (A) 4 (B) 8 (C) 12 (D) 16

Description : The number of isomers of glucose is (A) 4 (B) 8 (C) 12 (D) 16

Last Answer : D

The number of isomers of glucose is (A) 2 (B) 4 (C) 8 (D) 16

Description : The number of isomers of glucose is (A) 2 (B) 4 (C) 8 (D) 16

Last Answer : D

The number of isomers of glucose is (A) 2 (B) 4 (C) 8 (D) 16

Description : The number of isomers of glucose is (A) 2 (B) 4 (C) 8 (D) 16

Last Answer : (D) 16

Prostaglandins: a. contains 20 carbon atoms b. are unsaturated fatty acids containing a cyclopentane ring c. the different types of prostaglandins are classified according to the configuration of the cyclopentane ring d. all above

Description : Prostaglandins: a. contains 20 carbon atoms b. are unsaturated fatty acids containing a cyclopentane ring c. the different types of prostaglandins are classified according to the configuration of the cyclopentane ring d. all above

Last Answer : all above

The number of geometric isomers that can exist for square planar `[Pt(Cl)(py)(NH_(3))(NH_(2)OH)]^(+)` is (py=pyridine)

Description : The number of geometric isomers that can exist for square planar `[Pt(Cl)(py)(NH_(3))(NH_(2)OH)]^(+)` is (py=pyridine)

Last Answer : The number of geometric isomers that can exist for square planar `[Pt(Cl)(py)(NH_(3))(NH_(2)OH)]^(+)` is (py=pyridine) A. 2 B. 3 C. 4 D. 6

How many isomers of `C_(5)H_(11)OH` will be primary alcohols?

Description : How many isomers of `C_(5)H_(11)OH` will be primary alcohols?

Last Answer : How many isomers of `C_(5)H_(11)OH` will be primary alcohols? A. 5 B. 4 C. 2 D. 3

The designation D or Lbefore the name of a monosaccharide (a) indicates the direction of rotation of polarized light. (b) indicates the length of the carbon chain in the carbohydrate. (c) indicates the position of the OH group on the carbon next to the primary alcohol group. (d) indicates the position of the asymmetric carbon atoms in the carbohydrate.

Description : The designation D or Lbefore the name of a monosaccharide (a) indicates the direction of rotation of polarized light. (b) indicates the length of the carbon chain in the carbohydrate. (c) ... the primary alcohol group. (d) indicates the position of the asymmetric carbon atoms in the carbohydrate.

Last Answer : indicates the position of the OH group on the carbon next to the primary alcohol group.

For the complex [Fe(en)2Cl2], Cl, (en = ethylene diamine), identify (i) the oxidation number of iron, (ii) the hybrid orbitals and the shape of the complex, (iii) the magnetic behaviour of the complex, (iv) the number of geometrical isomers, (v) whether there is an optical isomer also, and (vi) name of the complex. (At. no. of Fe = 26) \ -Chemistry

Description : For the complex [Fe(en)2Cl2], Cl, (en = ethylene diamine), identify (i) the oxidation number of iron, (ii) the hybrid orbitals and the shape of the complex, (iii) the magnetic behaviour of the complex, (iv) ... an optical isomer also, and (vi) name of the complex. (At. no. of Fe = 26) \ -Chemistry

Last Answer : i) [Fe(en)2Cl2] Cl or x + 0 + 2 (-1) + (-1) = 0 x + (- 3) = 0 or x = + 3 ∴ Oxidation number of iron, x = + 3 (ii) The complex has two bidentate ligands and two ... )2Cl2] Cl, only cis-isomer shows optical isomerism. (vi) Name of complex: Dichloridobis (ethane-1, 2- diamine) Iron (III) chloride

The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:

Description : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:

Last Answer : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are: A. B. C. D.

A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m￾xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture? (A) The mixture exhibits an azeotrope at 101.3 kPa (B) The composition of the mixture, in percent by volume is: o-xylene 30, p￾xylene 60. and m-xylene 10 (C) The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10 (D) The mixture contain optical isomers

Description : A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m￾xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture? (A) The mixture exhibits ... : o-xylene 30, p-xylene 60 and m-xyoene 10 (D) The mixture contain optical isomers

Last Answer : (A) The mixture exhibits an azeotrope at 101.3 kPa

How many optical isomers are possible for lactic acid? (a) 2 (b) 4 (c) 6 (d) 8

Description : How many optical isomers are possible for lactic acid? (a) 2 (b) 4 (c) 6 (d) 8

Last Answer : 2

Optical isomers that are not mirror images are called (a) Diastereomers (b) Enantiomers (c) Metamers (d) Meso compounds

Description : Optical isomers that are not mirror images are called (a) Diastereomers (b) Enantiomers (c) Metamers (d) Meso compounds

Last Answer : Diastereomers

Optical isomers that are mirror images are called : (a) Tautomers (b) Diastereomers (c) Enantiomers (d) Metamers

Description : Optical isomers that are mirror images are called : (a) Tautomers (b) Diastereomers (c) Enantiomers (d) Metamers

Last Answer : Enantiomers

It is possible to distinguish between optical isomers (a) by using chemical tests (b) by mass spectrometry (c) by IR spectroscopy(d) by polarimetry

Description : It is possible to distinguish between optical isomers (a) by using chemical tests (b) by mass spectrometry (c) by IR spectroscopy (d) by polarimetry

Last Answer : (d) by polarimetry

The compounds CH3CH2OCH2CH3 and CH3OCH2CH2CH3 are (a) Enantiomers (b) Conformational isomers (c) Metamers (d) Optical isomers

Description : The compounds CH3CH2OCH2CH3 and CH3OCH2CH2CH3 are (a) Enantiomers (b) Conformational isomers (c) Metamers (d) Optical isomers

Last Answer : Metamers

Optical isomers are ------. a. Identical structures b. Not mirror images of each other c. Non super-imposable mirror images of each other. d. Super-imposable mirror images of each other

Description : Optical isomers are ------. a. Identical structures b. Not mirror images of each other c. Non super-imposable mirror images of each other. d. Super-imposable mirror images of each other

Last Answer : c. Non super-imposable mirror images of each other.

Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|

Description : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|

Last Answer : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset( ... (3)` A. 2 B. 3 C. 4 D. 5

Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Description : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Last Answer : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be ... A. I B. II C. III D. IV

Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Description : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Last Answer : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be ... A. I B. II C. III D. IV

Atoms of same element having different mass numbers are Called _______. (1) Isobars (2) Isotopes (3) (3)Isotones (4) (4) Isomers

Description : Atoms of same element having different mass numbers are Called _______. (1) Isobars (2) Isotopes (3) (3)Isotones (4) (4) Isomers

Last Answer : (2) Isotopes Explanation: Atoms that have the same atomic number but different atomic masses are called isotopes. The difference in mass arises due to the atoms containing a different number of neutrons ... -14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively.

When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as (A) Isomers (B) Isotopes (C) Isobars (D) Isotones

Description : When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as (A) Isomers (B) Isotopes (C) Isobars (D) Isotones

Last Answer : (D) Isotones

Which of the following statements is false about tautomers? (a) Tautomers are structural isomers (b) Tautomers are structural isomers which exist in dynamic equilibrium (c) Tautomerism involves movement of atoms (d) Tautomers have independent existence

Description : Which of the following statements is false about tautomers? (a) Tautomers are structural isomers (b) Tautomers are structural isomers which exist in dynamic equilibrium (c) Tautomerism involves movement of atoms (d) Tautomers have independent existence

Last Answer : Tautomers have independent existence

Two compounds have the same composition and also have the same atoms attached to the same atoms, although with different orientations in space. These compounds are (a) Identical (b) Position isomers (c) Structural isomers (d) Stereoisomers

Description : Two compounds have the same composition and also have the same atoms attached to the same atoms, although with different orientations in space. These compounds are (a) Identical (b) Position isomers (c) Structural isomers (d) Stereoisomers

Last Answer : Stereoisomers

Atoms of the same element that have different numbers of neutrons are called _______ a. isotopes b. ions c. isomers d. inert elements

Description : Atoms of the same element that have different numbers of neutrons are called _______ a. isotopes b. ions c. isomers d. inert elements

Last Answer : a. isotopes

Atoms of same element having different mass numbers are called__________ (1) Isobars (2) Isotopes (3) Isotones (4) Isomers

Description : Atoms of same element having different mass numbers are called__________ (1) Isobars (2) Isotopes (3) Isotones (4) Isomers

Last Answer : Isotopes

Why does sexual reproduction result in more genetic variations in a species?

Description : Why does sexual reproduction result in more genetic variations in a species?

Last Answer : Because the offspring have genetic material from bothparents

Why does sexual reproduction result in more genetic variations in a species?

Description : Why does sexual reproduction result in more genetic variations in a species?

Last Answer : Because the offspring have genetic material from bothparents

The phases of the moon are partially the result of the------? A. Changes in the shape of the moon B. Revolution of the moon around the earth (Answer) C. Variations in the moon’s gravitation D. Variations in the speed of rotation of the moon

Description : The phases of the moon are partially the result of the------? A. Changes in the shape of the moon B. Revolution of the moon around the earth (Answer) C. Variations in the moon’s gravitation D. Variations in the speed of rotation of the moon

Last Answer : B. Revolution of the moon around the earth (Answer)

α-D-glucose + 1120→ + 52.50 ← + 190 βD-glucose for glucose above represents (A) Optical isomerism (B) Mutarotation (C) Epimerisation (D) D and L isomerism

Description : α-D-glucose + 1120→ + 52.50 ← + 190 βD-glucose for glucose above represents (A) Optical isomerism (B) Mutarotation (C) Epimerisation (D) D and L isomerism

Last Answer : B

All the following statements correctly describe ketone bodies except (A) They may result from starvation (B) They are present at high levels in uncontrolled diabetes (C) They include—OH β-butyrate and acetone (D) They are utilized by the liver during long term starvation

Description : All the following statements correctly describe ketone bodies except (A) They may result from starvation (B) They are present at high levels in uncontrolled diabetes (C) They include—OH β-butyrate and acetone (D) They are utilized by the liver during long term starvation

Last Answer : Answer : D

Which one of the following biomolecules is correctly characterized? (a) Lecithin-a phosphorylated glyceride  found in cell membrane. (b) Palmitic acid - an unsaturated fatty acid with 18 carbon atoms. (c) Adenylic acid - adenosine with a glucose phosphate molecule. (d) Alanine amino acid - contains an amino group and an acidic group anywhere in the molecule.

Description : Which one of the following biomolecules is correctly characterized? (a) Lecithin-a phosphorylated glyceride  found in cell membrane. (b) Palmitic acid - an unsaturated fatty acid with 18 carbon atoms. ... Alanine amino acid - contains an amino group and an acidic group anywhere in the molecule.

Last Answer : (a) Lecithin-a phosphorylated glyceride  found in cell membrane