NEET Test Series from KOTA - 10 Papers In MS WORD
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Cell : Structure and Functions
168731
A major breakthrough in the studies of cells came with the development of electron microscope. This is because
1 The resolution power of the electron microscope is much higher than that of the light microscope.
2 The resolving power of the electron microscope is \(200-350 \mathrm{~nm}\) as compared to \(0.1-0.2 \mathrm{~nm}\) for the light microscope.
3 Electron beam can pass through thick materials, whereas light microscope requires thin sections.
4 The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons.
Explanation:
A An electron microscope is a microscope that use a beam of electrons as a source of illumination. The resolution power of the electron microscope is much higher than that of the light microscope. The increased resolution results from the shorter wavelength of the electron beam, by exocytosis at the plasma membrane.
AIPMT-2006
Cell : Structure and Functions
168737
Solution of polyethylene glycol (PEG) or a very brief high voltage electric current is used in fusion of
1 protoplasms
2 protoplasts
3 somatic cells
4 germinal cells
Explanation:
B Polyethylene glycols (PEGs) are products of condensed ethylene oxide and water that can have various derivatives and functions. Protoplast are naked cells from which cell wall has been removed. Fusions of protoplast is done with solution of PEG or a very brief high voltage current.
Punjab MET-2007
Cell : Structure and Functions
168742
A cell is kept in a solution for sometimes, when it bursts. The solution should be :
1 isotonic
2 hypertonic
3 hypotonic
4 monotonic
Explanation:
C A cell kept in a certain solution bursts after sometime. Due to the inward movement of water, that is called endosmosis and the type of solution in which endosmosis takes place is known as a hypotonic solution. In a hypotonic solution solute concentration is lower than that of the solute concentration inside the cell, thus facilitating endosmosis leading to the bursting of cell. Solution that contain the same concentration of water and solutes as the cell cytoplasm are called is isotonic solution. Solution that has a higher concentration of solutes on the outside of a cell is hypertonic solution.
Manipal-2001
Cell : Structure and Functions
168747
The protoplasm is
1 emulsion
2 colloidal
3 suspension
4 None of these
Explanation:
B Protoplasm is clear translucent odorless colour less crystallo - colloid type of solution. (eg sugar, salt acid crystal). Protoplasm is the mixture of the chemicals found in crystal formed. Eg - sugar, salt acid and bases. On the other hand chemicals of colloidal nature. Eg Protein, lipids and polysaccharids. An emulsion is a solution of two or more immiscible liquids where one liquid contains a dispersion of the other liquids. A suspension is a heterogeneous mixture.
168731
A major breakthrough in the studies of cells came with the development of electron microscope. This is because
1 The resolution power of the electron microscope is much higher than that of the light microscope.
2 The resolving power of the electron microscope is \(200-350 \mathrm{~nm}\) as compared to \(0.1-0.2 \mathrm{~nm}\) for the light microscope.
3 Electron beam can pass through thick materials, whereas light microscope requires thin sections.
4 The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons.
Explanation:
A An electron microscope is a microscope that use a beam of electrons as a source of illumination. The resolution power of the electron microscope is much higher than that of the light microscope. The increased resolution results from the shorter wavelength of the electron beam, by exocytosis at the plasma membrane.
AIPMT-2006
Cell : Structure and Functions
168737
Solution of polyethylene glycol (PEG) or a very brief high voltage electric current is used in fusion of
1 protoplasms
2 protoplasts
3 somatic cells
4 germinal cells
Explanation:
B Polyethylene glycols (PEGs) are products of condensed ethylene oxide and water that can have various derivatives and functions. Protoplast are naked cells from which cell wall has been removed. Fusions of protoplast is done with solution of PEG or a very brief high voltage current.
Punjab MET-2007
Cell : Structure and Functions
168742
A cell is kept in a solution for sometimes, when it bursts. The solution should be :
1 isotonic
2 hypertonic
3 hypotonic
4 monotonic
Explanation:
C A cell kept in a certain solution bursts after sometime. Due to the inward movement of water, that is called endosmosis and the type of solution in which endosmosis takes place is known as a hypotonic solution. In a hypotonic solution solute concentration is lower than that of the solute concentration inside the cell, thus facilitating endosmosis leading to the bursting of cell. Solution that contain the same concentration of water and solutes as the cell cytoplasm are called is isotonic solution. Solution that has a higher concentration of solutes on the outside of a cell is hypertonic solution.
Manipal-2001
Cell : Structure and Functions
168747
The protoplasm is
1 emulsion
2 colloidal
3 suspension
4 None of these
Explanation:
B Protoplasm is clear translucent odorless colour less crystallo - colloid type of solution. (eg sugar, salt acid crystal). Protoplasm is the mixture of the chemicals found in crystal formed. Eg - sugar, salt acid and bases. On the other hand chemicals of colloidal nature. Eg Protein, lipids and polysaccharids. An emulsion is a solution of two or more immiscible liquids where one liquid contains a dispersion of the other liquids. A suspension is a heterogeneous mixture.
168731
A major breakthrough in the studies of cells came with the development of electron microscope. This is because
1 The resolution power of the electron microscope is much higher than that of the light microscope.
2 The resolving power of the electron microscope is \(200-350 \mathrm{~nm}\) as compared to \(0.1-0.2 \mathrm{~nm}\) for the light microscope.
3 Electron beam can pass through thick materials, whereas light microscope requires thin sections.
4 The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons.
Explanation:
A An electron microscope is a microscope that use a beam of electrons as a source of illumination. The resolution power of the electron microscope is much higher than that of the light microscope. The increased resolution results from the shorter wavelength of the electron beam, by exocytosis at the plasma membrane.
AIPMT-2006
Cell : Structure and Functions
168737
Solution of polyethylene glycol (PEG) or a very brief high voltage electric current is used in fusion of
1 protoplasms
2 protoplasts
3 somatic cells
4 germinal cells
Explanation:
B Polyethylene glycols (PEGs) are products of condensed ethylene oxide and water that can have various derivatives and functions. Protoplast are naked cells from which cell wall has been removed. Fusions of protoplast is done with solution of PEG or a very brief high voltage current.
Punjab MET-2007
Cell : Structure and Functions
168742
A cell is kept in a solution for sometimes, when it bursts. The solution should be :
1 isotonic
2 hypertonic
3 hypotonic
4 monotonic
Explanation:
C A cell kept in a certain solution bursts after sometime. Due to the inward movement of water, that is called endosmosis and the type of solution in which endosmosis takes place is known as a hypotonic solution. In a hypotonic solution solute concentration is lower than that of the solute concentration inside the cell, thus facilitating endosmosis leading to the bursting of cell. Solution that contain the same concentration of water and solutes as the cell cytoplasm are called is isotonic solution. Solution that has a higher concentration of solutes on the outside of a cell is hypertonic solution.
Manipal-2001
Cell : Structure and Functions
168747
The protoplasm is
1 emulsion
2 colloidal
3 suspension
4 None of these
Explanation:
B Protoplasm is clear translucent odorless colour less crystallo - colloid type of solution. (eg sugar, salt acid crystal). Protoplasm is the mixture of the chemicals found in crystal formed. Eg - sugar, salt acid and bases. On the other hand chemicals of colloidal nature. Eg Protein, lipids and polysaccharids. An emulsion is a solution of two or more immiscible liquids where one liquid contains a dispersion of the other liquids. A suspension is a heterogeneous mixture.
168731
A major breakthrough in the studies of cells came with the development of electron microscope. This is because
1 The resolution power of the electron microscope is much higher than that of the light microscope.
2 The resolving power of the electron microscope is \(200-350 \mathrm{~nm}\) as compared to \(0.1-0.2 \mathrm{~nm}\) for the light microscope.
3 Electron beam can pass through thick materials, whereas light microscope requires thin sections.
4 The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons.
Explanation:
A An electron microscope is a microscope that use a beam of electrons as a source of illumination. The resolution power of the electron microscope is much higher than that of the light microscope. The increased resolution results from the shorter wavelength of the electron beam, by exocytosis at the plasma membrane.
AIPMT-2006
Cell : Structure and Functions
168737
Solution of polyethylene glycol (PEG) or a very brief high voltage electric current is used in fusion of
1 protoplasms
2 protoplasts
3 somatic cells
4 germinal cells
Explanation:
B Polyethylene glycols (PEGs) are products of condensed ethylene oxide and water that can have various derivatives and functions. Protoplast are naked cells from which cell wall has been removed. Fusions of protoplast is done with solution of PEG or a very brief high voltage current.
Punjab MET-2007
Cell : Structure and Functions
168742
A cell is kept in a solution for sometimes, when it bursts. The solution should be :
1 isotonic
2 hypertonic
3 hypotonic
4 monotonic
Explanation:
C A cell kept in a certain solution bursts after sometime. Due to the inward movement of water, that is called endosmosis and the type of solution in which endosmosis takes place is known as a hypotonic solution. In a hypotonic solution solute concentration is lower than that of the solute concentration inside the cell, thus facilitating endosmosis leading to the bursting of cell. Solution that contain the same concentration of water and solutes as the cell cytoplasm are called is isotonic solution. Solution that has a higher concentration of solutes on the outside of a cell is hypertonic solution.
Manipal-2001
Cell : Structure and Functions
168747
The protoplasm is
1 emulsion
2 colloidal
3 suspension
4 None of these
Explanation:
B Protoplasm is clear translucent odorless colour less crystallo - colloid type of solution. (eg sugar, salt acid crystal). Protoplasm is the mixture of the chemicals found in crystal formed. Eg - sugar, salt acid and bases. On the other hand chemicals of colloidal nature. Eg Protein, lipids and polysaccharids. An emulsion is a solution of two or more immiscible liquids where one liquid contains a dispersion of the other liquids. A suspension is a heterogeneous mixture.
