277718
The charged molecule which is electrically neutral is known as
1 amino acid
2 zwitterion
3 amide
4 peptide
Explanation:
(b) Zwitterion is a neutral molecule with a positive and a negative electrical charge, though multiple positive and negative charges can be present. Amino acids are the best known examples of zwitterions.
NCERT Page-144 / N-106
Biomolecules
277720
Unsaturated fatty acids have
1 palmitic acid
2 oleic acid
3 high melting point
4 one or more double bonds
Explanation:
(d) Saturated fatty acids do not have any double bond while unsaturated fatty acids have one or more double bonds.
NCERT Page-144 / N-106
Biomolecules
277721
Which of the following statement is incorrect?]#
1 Long chain molecules of fatty acids are formed by polymerisation of 2 carbon compounds.
2 Lipid molecules are soluble in water.
3 In lipid,$\text{R}$ group may be $-\text{C}{{\text{H}}_{3}}$ group, $-{{\text{C}}_{2}}{{\text{H}}_{5}}$ group or higher number of $-\text{C}{{\text{H}}_{2}}$ group (1 to 19 carbon).
4 Oils have lower melting temperature.
Explanation:
(b) Lipid molecules are insoluble in water because lipid molecules are hydrophobic, but they are readily soluble in nonpolar organic solvents like chloroform and benzene.
Biomolecules
277722
Glycerol is a
1 tetrahydroxy propane
2 trihydroxy propane
3 trihydroxy butane
4 tetrahydroxy butane
Explanation:
(b) Glycerol is a trihydroxy propane compound and has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. It is a colourless, odourless, viscous liquid that is widely used in pharmaceutical formulations.
277718
The charged molecule which is electrically neutral is known as
1 amino acid
2 zwitterion
3 amide
4 peptide
Explanation:
(b) Zwitterion is a neutral molecule with a positive and a negative electrical charge, though multiple positive and negative charges can be present. Amino acids are the best known examples of zwitterions.
NCERT Page-144 / N-106
Biomolecules
277720
Unsaturated fatty acids have
1 palmitic acid
2 oleic acid
3 high melting point
4 one or more double bonds
Explanation:
(d) Saturated fatty acids do not have any double bond while unsaturated fatty acids have one or more double bonds.
NCERT Page-144 / N-106
Biomolecules
277721
Which of the following statement is incorrect?]#
1 Long chain molecules of fatty acids are formed by polymerisation of 2 carbon compounds.
2 Lipid molecules are soluble in water.
3 In lipid,$\text{R}$ group may be $-\text{C}{{\text{H}}_{3}}$ group, $-{{\text{C}}_{2}}{{\text{H}}_{5}}$ group or higher number of $-\text{C}{{\text{H}}_{2}}$ group (1 to 19 carbon).
4 Oils have lower melting temperature.
Explanation:
(b) Lipid molecules are insoluble in water because lipid molecules are hydrophobic, but they are readily soluble in nonpolar organic solvents like chloroform and benzene.
Biomolecules
277722
Glycerol is a
1 tetrahydroxy propane
2 trihydroxy propane
3 trihydroxy butane
4 tetrahydroxy butane
Explanation:
(b) Glycerol is a trihydroxy propane compound and has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. It is a colourless, odourless, viscous liquid that is widely used in pharmaceutical formulations.
277718
The charged molecule which is electrically neutral is known as
1 amino acid
2 zwitterion
3 amide
4 peptide
Explanation:
(b) Zwitterion is a neutral molecule with a positive and a negative electrical charge, though multiple positive and negative charges can be present. Amino acids are the best known examples of zwitterions.
NCERT Page-144 / N-106
Biomolecules
277720
Unsaturated fatty acids have
1 palmitic acid
2 oleic acid
3 high melting point
4 one or more double bonds
Explanation:
(d) Saturated fatty acids do not have any double bond while unsaturated fatty acids have one or more double bonds.
NCERT Page-144 / N-106
Biomolecules
277721
Which of the following statement is incorrect?]#
1 Long chain molecules of fatty acids are formed by polymerisation of 2 carbon compounds.
2 Lipid molecules are soluble in water.
3 In lipid,$\text{R}$ group may be $-\text{C}{{\text{H}}_{3}}$ group, $-{{\text{C}}_{2}}{{\text{H}}_{5}}$ group or higher number of $-\text{C}{{\text{H}}_{2}}$ group (1 to 19 carbon).
4 Oils have lower melting temperature.
Explanation:
(b) Lipid molecules are insoluble in water because lipid molecules are hydrophobic, but they are readily soluble in nonpolar organic solvents like chloroform and benzene.
Biomolecules
277722
Glycerol is a
1 tetrahydroxy propane
2 trihydroxy propane
3 trihydroxy butane
4 tetrahydroxy butane
Explanation:
(b) Glycerol is a trihydroxy propane compound and has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. It is a colourless, odourless, viscous liquid that is widely used in pharmaceutical formulations.
277718
The charged molecule which is electrically neutral is known as
1 amino acid
2 zwitterion
3 amide
4 peptide
Explanation:
(b) Zwitterion is a neutral molecule with a positive and a negative electrical charge, though multiple positive and negative charges can be present. Amino acids are the best known examples of zwitterions.
NCERT Page-144 / N-106
Biomolecules
277720
Unsaturated fatty acids have
1 palmitic acid
2 oleic acid
3 high melting point
4 one or more double bonds
Explanation:
(d) Saturated fatty acids do not have any double bond while unsaturated fatty acids have one or more double bonds.
NCERT Page-144 / N-106
Biomolecules
277721
Which of the following statement is incorrect?]#
1 Long chain molecules of fatty acids are formed by polymerisation of 2 carbon compounds.
2 Lipid molecules are soluble in water.
3 In lipid,$\text{R}$ group may be $-\text{C}{{\text{H}}_{3}}$ group, $-{{\text{C}}_{2}}{{\text{H}}_{5}}$ group or higher number of $-\text{C}{{\text{H}}_{2}}$ group (1 to 19 carbon).
4 Oils have lower melting temperature.
Explanation:
(b) Lipid molecules are insoluble in water because lipid molecules are hydrophobic, but they are readily soluble in nonpolar organic solvents like chloroform and benzene.
Biomolecules
277722
Glycerol is a
1 tetrahydroxy propane
2 trihydroxy propane
3 trihydroxy butane
4 tetrahydroxy butane
Explanation:
(b) Glycerol is a trihydroxy propane compound and has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. It is a colourless, odourless, viscous liquid that is widely used in pharmaceutical formulations.
