(b) Fat is a group of natural esters of glycerol and various fatty acids, which are solid at room temperature and are the main constituents of animal and vegetable fat.
NCERT Page-145 / N-107
Biomolecules
277724
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
277717
The given structural formulas represent amino acids (labelled by as X, Y and Z)
Identify the correct name of $X,Y$ and $Z$.
1 Alanine, serine and glycine respectively.
2 Tyrosine, cysteine and glutamic acid respectively.
3 Glycine, alanine and serine acid respectively.
4 Cysteine, glutamic acid and tyrosine respectively.
Explanation:
(c) The correct name of the structural formula of the given amino acids $-X,Y$ and $Z$ are respectively glycine, alanine and serine.
NCERT Page-145 / N-107
Biomolecules
277728
The given diagrammatic representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and one blank component marked as " $X$ " in it.
(d) A combination of a nitrogen base with a pentose sugar is known as nucleoside. The nitrogen base combines with the sugar molecule at its carbon atom ${1}'$ in a glycosidic bond ( $\text{C}-\text{N}-\text{C}$ ) by one of its nitrogen atoms (usually 1 in pyrimidines and 9 in purines). Depending upon the type of pentose sugar, nucleosides are differentiated into ribonucleosides and deoxyribonucleosides.
(b) Fat is a group of natural esters of glycerol and various fatty acids, which are solid at room temperature and are the main constituents of animal and vegetable fat.
NCERT Page-145 / N-107
Biomolecules
277724
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
277717
The given structural formulas represent amino acids (labelled by as X, Y and Z)
Identify the correct name of $X,Y$ and $Z$.
1 Alanine, serine and glycine respectively.
2 Tyrosine, cysteine and glutamic acid respectively.
3 Glycine, alanine and serine acid respectively.
4 Cysteine, glutamic acid and tyrosine respectively.
Explanation:
(c) The correct name of the structural formula of the given amino acids $-X,Y$ and $Z$ are respectively glycine, alanine and serine.
NCERT Page-145 / N-107
Biomolecules
277728
The given diagrammatic representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and one blank component marked as " $X$ " in it.
(d) A combination of a nitrogen base with a pentose sugar is known as nucleoside. The nitrogen base combines with the sugar molecule at its carbon atom ${1}'$ in a glycosidic bond ( $\text{C}-\text{N}-\text{C}$ ) by one of its nitrogen atoms (usually 1 in pyrimidines and 9 in purines). Depending upon the type of pentose sugar, nucleosides are differentiated into ribonucleosides and deoxyribonucleosides.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Biomolecules
277723
A fat has
1 3 glycerol and one fatty acid molecule.
2 one glycerol and 3 fatty acid molecules.
3 3 glycerol and 3 fatty acid molecules.
4 one glycerol and one fatty acid molecule.
Explanation:
(b) Fat is a group of natural esters of glycerol and various fatty acids, which are solid at room temperature and are the main constituents of animal and vegetable fat.
NCERT Page-145 / N-107
Biomolecules
277724
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
277717
The given structural formulas represent amino acids (labelled by as X, Y and Z)
Identify the correct name of $X,Y$ and $Z$.
1 Alanine, serine and glycine respectively.
2 Tyrosine, cysteine and glutamic acid respectively.
3 Glycine, alanine and serine acid respectively.
4 Cysteine, glutamic acid and tyrosine respectively.
Explanation:
(c) The correct name of the structural formula of the given amino acids $-X,Y$ and $Z$ are respectively glycine, alanine and serine.
NCERT Page-145 / N-107
Biomolecules
277728
The given diagrammatic representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and one blank component marked as " $X$ " in it.
(d) A combination of a nitrogen base with a pentose sugar is known as nucleoside. The nitrogen base combines with the sugar molecule at its carbon atom ${1}'$ in a glycosidic bond ( $\text{C}-\text{N}-\text{C}$ ) by one of its nitrogen atoms (usually 1 in pyrimidines and 9 in purines). Depending upon the type of pentose sugar, nucleosides are differentiated into ribonucleosides and deoxyribonucleosides.
(b) Fat is a group of natural esters of glycerol and various fatty acids, which are solid at room temperature and are the main constituents of animal and vegetable fat.
NCERT Page-145 / N-107
Biomolecules
277724
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
277717
The given structural formulas represent amino acids (labelled by as X, Y and Z)
Identify the correct name of $X,Y$ and $Z$.
1 Alanine, serine and glycine respectively.
2 Tyrosine, cysteine and glutamic acid respectively.
3 Glycine, alanine and serine acid respectively.
4 Cysteine, glutamic acid and tyrosine respectively.
Explanation:
(c) The correct name of the structural formula of the given amino acids $-X,Y$ and $Z$ are respectively glycine, alanine and serine.
NCERT Page-145 / N-107
Biomolecules
277728
The given diagrammatic representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and one blank component marked as " $X$ " in it.
(d) A combination of a nitrogen base with a pentose sugar is known as nucleoside. The nitrogen base combines with the sugar molecule at its carbon atom ${1}'$ in a glycosidic bond ( $\text{C}-\text{N}-\text{C}$ ) by one of its nitrogen atoms (usually 1 in pyrimidines and 9 in purines). Depending upon the type of pentose sugar, nucleosides are differentiated into ribonucleosides and deoxyribonucleosides.
