NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOMOLECULES(NCERT)
277948
Unsaturated fatty acids have
1 oleic acid
2 high melting point
3 palmitic acid
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(NCERT)
277949
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(NCERT)
277952
Lipids are insoluble in water because lipid molecules are
1 hydrophilic
2 neutral
3 hydrophobic
4 zwitter ions
Explanation:
(b) Water attracting molecules are called hydrophilic. Water repelling molecules are called hydrophobic. Amino acids simultaneously carry positive and negative charges. Such substances are called zwitter ions. Lipids are compounds of $\text{C},\text{H},\text{O}$ but the ratio of $\text{H}$ and $\text{O}$ is more than $2:1$, that is, the ratio of oxygen is lesser than carbohydrates. Lipids are insoluble in water but soluble in non-polar solvents such as benzene, chloroform etc.
NCERT Page-144/ N-106
BIOMOLECULES(NCERT)
277953
Mark the odd pair in the followings
1 Amino acid -- Protein
2 Nucleotide -- DNA
3 Glycerol -- Fatty acid
4 Monosaccharide -- Cellulose
Explanation:
(c) Three molecules of fatty acid linked with one molecule of glycerol to form a simple lipid called triglycerides.
(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(NCERT)
277949
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(NCERT)
277952
Lipids are insoluble in water because lipid molecules are
1 hydrophilic
2 neutral
3 hydrophobic
4 zwitter ions
Explanation:
(b) Water attracting molecules are called hydrophilic. Water repelling molecules are called hydrophobic. Amino acids simultaneously carry positive and negative charges. Such substances are called zwitter ions. Lipids are compounds of $\text{C},\text{H},\text{O}$ but the ratio of $\text{H}$ and $\text{O}$ is more than $2:1$, that is, the ratio of oxygen is lesser than carbohydrates. Lipids are insoluble in water but soluble in non-polar solvents such as benzene, chloroform etc.
NCERT Page-144/ N-106
BIOMOLECULES(NCERT)
277953
Mark the odd pair in the followings
1 Amino acid -- Protein
2 Nucleotide -- DNA
3 Glycerol -- Fatty acid
4 Monosaccharide -- Cellulose
Explanation:
(c) Three molecules of fatty acid linked with one molecule of glycerol to form a simple lipid called triglycerides.
(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(NCERT)
277949
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(NCERT)
277952
Lipids are insoluble in water because lipid molecules are
1 hydrophilic
2 neutral
3 hydrophobic
4 zwitter ions
Explanation:
(b) Water attracting molecules are called hydrophilic. Water repelling molecules are called hydrophobic. Amino acids simultaneously carry positive and negative charges. Such substances are called zwitter ions. Lipids are compounds of $\text{C},\text{H},\text{O}$ but the ratio of $\text{H}$ and $\text{O}$ is more than $2:1$, that is, the ratio of oxygen is lesser than carbohydrates. Lipids are insoluble in water but soluble in non-polar solvents such as benzene, chloroform etc.
NCERT Page-144/ N-106
BIOMOLECULES(NCERT)
277953
Mark the odd pair in the followings
1 Amino acid -- Protein
2 Nucleotide -- DNA
3 Glycerol -- Fatty acid
4 Monosaccharide -- Cellulose
Explanation:
(c) Three molecules of fatty acid linked with one molecule of glycerol to form a simple lipid called triglycerides.
(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(NCERT)
277949
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(NCERT)
277952
Lipids are insoluble in water because lipid molecules are
1 hydrophilic
2 neutral
3 hydrophobic
4 zwitter ions
Explanation:
(b) Water attracting molecules are called hydrophilic. Water repelling molecules are called hydrophobic. Amino acids simultaneously carry positive and negative charges. Such substances are called zwitter ions. Lipids are compounds of $\text{C},\text{H},\text{O}$ but the ratio of $\text{H}$ and $\text{O}$ is more than $2:1$, that is, the ratio of oxygen is lesser than carbohydrates. Lipids are insoluble in water but soluble in non-polar solvents such as benzene, chloroform etc.
NCERT Page-144/ N-106
BIOMOLECULES(NCERT)
277953
Mark the odd pair in the followings
1 Amino acid -- Protein
2 Nucleotide -- DNA
3 Glycerol -- Fatty acid
4 Monosaccharide -- Cellulose
Explanation:
(c) Three molecules of fatty acid linked with one molecule of glycerol to form a simple lipid called triglycerides.
