169061
Select the correct statement from the following regarding cell membrane:
1 Lipids are arranged in a bilayer with polar heads towards the inner part
2 Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
3 \(\mathrm{Na}^{+}\)and \(\mathrm{K}^{+}\)ions move across cell membrane by passive transport
4 Proteins make up 60 to \(70 \%\) of the cells membrane
Explanation:
B In 1972 Singer and Nicholson proposed fluid mosaic model for internal structure of plasma membrane. This is most widely accepted model of plasma membrane. According to this model a membrane consists of continuous bilayer of phospholipid molecules in which globular proteins are embedded. The lipids are arranged in a bilayer with polar heads towards outside and non-polar tails towards Inside.
AIPMT (Screening)-2012
Cell : Structure and Functions
169062
Element necessary for the middle lamella
1 \(\mathrm{Ca}\)
2 \(\mathrm{Zn}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Cu}\)
Explanation:
A - Middle lamella is a jelly-like substances made up of calcium and magnesium pectate. Middle lamella is the first formed layer, present between the two adjacent cells. It is situated outside of the primary cell wall.
AIPMT-2001
Cell : Structure and Functions
169063
The right sequence of carriers, which involve in the transport of excess \(\mathrm{Na}^{+}\)ions out of the cell in salt resistant plants, is
1 Uniporter, Symporter
2 Symporter, Antiporter
3 Antiporter, Uniporter
4 Uniporter, Antiporter
Explanation:
D The right sequence of carriers which involved in the transport of excess \(\mathrm{Na}+\) ion out of the cell in salt resistant plants are Uniporter and Antiporter. Uniporter is a membrane transport protein that transports a single species of substrate (Charged or uncharged) across a cell membrane. Antiporter is a membrane protein that transports two molecules at the same time in the opposite direction.
AP EAMCET-2010
Cell : Structure and Functions
169065
Ultraphagocytosis (colloidopexy) is intake by cell of
1 Chromagen particles
2 Small colloidal particles
3 Large colloidal particles
4 It is very quick phagocytosis
Explanation:
B Phagoytosis or cell eating is the process by which a cell engulfs a solid particle and digests it . Phagocytosis occurs in specialized cells in which plasma membrane ingests macrophages, neutrophils and other white blood cells (smaller colloidal particles). Ultraphagocytosis is uptake of macromolecules and larger energy rich particles but intake by cell of small colloidal particle.
VMMC-2008
Cell : Structure and Functions
169066
In fluid mosaic model of plasma membrane
1 Upper layer is non-polar and hydrophilic
2 Polar layer is hydrophobic
3 Phospholipids form a bimolecular layer in middle part
4 Proteins form a middle layer
Explanation:
C Fluid mosaic model of the plasma membrane was proposed by S. J. Singer and Garth L. Nicolson 1972. According to this model, the plasma membrane is a phospholipid bilayer in which the proteins cholestrol and carbohydrates are incorporated which give it a mosaic like appearance. In Phospholipids layer upper or outer part like hydrophilic and polar heads of the lipid molecules are arranged on the outer side and inner side of the bilayer hydrophobic \& non-polar tails are present. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell.
169061
Select the correct statement from the following regarding cell membrane:
1 Lipids are arranged in a bilayer with polar heads towards the inner part
2 Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
3 \(\mathrm{Na}^{+}\)and \(\mathrm{K}^{+}\)ions move across cell membrane by passive transport
4 Proteins make up 60 to \(70 \%\) of the cells membrane
Explanation:
B In 1972 Singer and Nicholson proposed fluid mosaic model for internal structure of plasma membrane. This is most widely accepted model of plasma membrane. According to this model a membrane consists of continuous bilayer of phospholipid molecules in which globular proteins are embedded. The lipids are arranged in a bilayer with polar heads towards outside and non-polar tails towards Inside.
AIPMT (Screening)-2012
Cell : Structure and Functions
169062
Element necessary for the middle lamella
1 \(\mathrm{Ca}\)
2 \(\mathrm{Zn}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Cu}\)
Explanation:
A - Middle lamella is a jelly-like substances made up of calcium and magnesium pectate. Middle lamella is the first formed layer, present between the two adjacent cells. It is situated outside of the primary cell wall.
AIPMT-2001
Cell : Structure and Functions
169063
The right sequence of carriers, which involve in the transport of excess \(\mathrm{Na}^{+}\)ions out of the cell in salt resistant plants, is
1 Uniporter, Symporter
2 Symporter, Antiporter
3 Antiporter, Uniporter
4 Uniporter, Antiporter
Explanation:
D The right sequence of carriers which involved in the transport of excess \(\mathrm{Na}+\) ion out of the cell in salt resistant plants are Uniporter and Antiporter. Uniporter is a membrane transport protein that transports a single species of substrate (Charged or uncharged) across a cell membrane. Antiporter is a membrane protein that transports two molecules at the same time in the opposite direction.
AP EAMCET-2010
Cell : Structure and Functions
169065
Ultraphagocytosis (colloidopexy) is intake by cell of
1 Chromagen particles
2 Small colloidal particles
3 Large colloidal particles
4 It is very quick phagocytosis
Explanation:
B Phagoytosis or cell eating is the process by which a cell engulfs a solid particle and digests it . Phagocytosis occurs in specialized cells in which plasma membrane ingests macrophages, neutrophils and other white blood cells (smaller colloidal particles). Ultraphagocytosis is uptake of macromolecules and larger energy rich particles but intake by cell of small colloidal particle.
VMMC-2008
Cell : Structure and Functions
169066
In fluid mosaic model of plasma membrane
1 Upper layer is non-polar and hydrophilic
2 Polar layer is hydrophobic
3 Phospholipids form a bimolecular layer in middle part
4 Proteins form a middle layer
Explanation:
C Fluid mosaic model of the plasma membrane was proposed by S. J. Singer and Garth L. Nicolson 1972. According to this model, the plasma membrane is a phospholipid bilayer in which the proteins cholestrol and carbohydrates are incorporated which give it a mosaic like appearance. In Phospholipids layer upper or outer part like hydrophilic and polar heads of the lipid molecules are arranged on the outer side and inner side of the bilayer hydrophobic \& non-polar tails are present. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell.
169061
Select the correct statement from the following regarding cell membrane:
1 Lipids are arranged in a bilayer with polar heads towards the inner part
2 Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
3 \(\mathrm{Na}^{+}\)and \(\mathrm{K}^{+}\)ions move across cell membrane by passive transport
4 Proteins make up 60 to \(70 \%\) of the cells membrane
Explanation:
B In 1972 Singer and Nicholson proposed fluid mosaic model for internal structure of plasma membrane. This is most widely accepted model of plasma membrane. According to this model a membrane consists of continuous bilayer of phospholipid molecules in which globular proteins are embedded. The lipids are arranged in a bilayer with polar heads towards outside and non-polar tails towards Inside.
AIPMT (Screening)-2012
Cell : Structure and Functions
169062
Element necessary for the middle lamella
1 \(\mathrm{Ca}\)
2 \(\mathrm{Zn}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Cu}\)
Explanation:
A - Middle lamella is a jelly-like substances made up of calcium and magnesium pectate. Middle lamella is the first formed layer, present between the two adjacent cells. It is situated outside of the primary cell wall.
AIPMT-2001
Cell : Structure and Functions
169063
The right sequence of carriers, which involve in the transport of excess \(\mathrm{Na}^{+}\)ions out of the cell in salt resistant plants, is
1 Uniporter, Symporter
2 Symporter, Antiporter
3 Antiporter, Uniporter
4 Uniporter, Antiporter
Explanation:
D The right sequence of carriers which involved in the transport of excess \(\mathrm{Na}+\) ion out of the cell in salt resistant plants are Uniporter and Antiporter. Uniporter is a membrane transport protein that transports a single species of substrate (Charged or uncharged) across a cell membrane. Antiporter is a membrane protein that transports two molecules at the same time in the opposite direction.
AP EAMCET-2010
Cell : Structure and Functions
169065
Ultraphagocytosis (colloidopexy) is intake by cell of
1 Chromagen particles
2 Small colloidal particles
3 Large colloidal particles
4 It is very quick phagocytosis
Explanation:
B Phagoytosis or cell eating is the process by which a cell engulfs a solid particle and digests it . Phagocytosis occurs in specialized cells in which plasma membrane ingests macrophages, neutrophils and other white blood cells (smaller colloidal particles). Ultraphagocytosis is uptake of macromolecules and larger energy rich particles but intake by cell of small colloidal particle.
VMMC-2008
Cell : Structure and Functions
169066
In fluid mosaic model of plasma membrane
1 Upper layer is non-polar and hydrophilic
2 Polar layer is hydrophobic
3 Phospholipids form a bimolecular layer in middle part
4 Proteins form a middle layer
Explanation:
C Fluid mosaic model of the plasma membrane was proposed by S. J. Singer and Garth L. Nicolson 1972. According to this model, the plasma membrane is a phospholipid bilayer in which the proteins cholestrol and carbohydrates are incorporated which give it a mosaic like appearance. In Phospholipids layer upper or outer part like hydrophilic and polar heads of the lipid molecules are arranged on the outer side and inner side of the bilayer hydrophobic \& non-polar tails are present. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Cell : Structure and Functions
169061
Select the correct statement from the following regarding cell membrane:
1 Lipids are arranged in a bilayer with polar heads towards the inner part
2 Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
3 \(\mathrm{Na}^{+}\)and \(\mathrm{K}^{+}\)ions move across cell membrane by passive transport
4 Proteins make up 60 to \(70 \%\) of the cells membrane
Explanation:
B In 1972 Singer and Nicholson proposed fluid mosaic model for internal structure of plasma membrane. This is most widely accepted model of plasma membrane. According to this model a membrane consists of continuous bilayer of phospholipid molecules in which globular proteins are embedded. The lipids are arranged in a bilayer with polar heads towards outside and non-polar tails towards Inside.
AIPMT (Screening)-2012
Cell : Structure and Functions
169062
Element necessary for the middle lamella
1 \(\mathrm{Ca}\)
2 \(\mathrm{Zn}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Cu}\)
Explanation:
A - Middle lamella is a jelly-like substances made up of calcium and magnesium pectate. Middle lamella is the first formed layer, present between the two adjacent cells. It is situated outside of the primary cell wall.
AIPMT-2001
Cell : Structure and Functions
169063
The right sequence of carriers, which involve in the transport of excess \(\mathrm{Na}^{+}\)ions out of the cell in salt resistant plants, is
1 Uniporter, Symporter
2 Symporter, Antiporter
3 Antiporter, Uniporter
4 Uniporter, Antiporter
Explanation:
D The right sequence of carriers which involved in the transport of excess \(\mathrm{Na}+\) ion out of the cell in salt resistant plants are Uniporter and Antiporter. Uniporter is a membrane transport protein that transports a single species of substrate (Charged or uncharged) across a cell membrane. Antiporter is a membrane protein that transports two molecules at the same time in the opposite direction.
AP EAMCET-2010
Cell : Structure and Functions
169065
Ultraphagocytosis (colloidopexy) is intake by cell of
1 Chromagen particles
2 Small colloidal particles
3 Large colloidal particles
4 It is very quick phagocytosis
Explanation:
B Phagoytosis or cell eating is the process by which a cell engulfs a solid particle and digests it . Phagocytosis occurs in specialized cells in which plasma membrane ingests macrophages, neutrophils and other white blood cells (smaller colloidal particles). Ultraphagocytosis is uptake of macromolecules and larger energy rich particles but intake by cell of small colloidal particle.
VMMC-2008
Cell : Structure and Functions
169066
In fluid mosaic model of plasma membrane
1 Upper layer is non-polar and hydrophilic
2 Polar layer is hydrophobic
3 Phospholipids form a bimolecular layer in middle part
4 Proteins form a middle layer
Explanation:
C Fluid mosaic model of the plasma membrane was proposed by S. J. Singer and Garth L. Nicolson 1972. According to this model, the plasma membrane is a phospholipid bilayer in which the proteins cholestrol and carbohydrates are incorporated which give it a mosaic like appearance. In Phospholipids layer upper or outer part like hydrophilic and polar heads of the lipid molecules are arranged on the outer side and inner side of the bilayer hydrophobic \& non-polar tails are present. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell.
169061
Select the correct statement from the following regarding cell membrane:
1 Lipids are arranged in a bilayer with polar heads towards the inner part
2 Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
3 \(\mathrm{Na}^{+}\)and \(\mathrm{K}^{+}\)ions move across cell membrane by passive transport
4 Proteins make up 60 to \(70 \%\) of the cells membrane
Explanation:
B In 1972 Singer and Nicholson proposed fluid mosaic model for internal structure of plasma membrane. This is most widely accepted model of plasma membrane. According to this model a membrane consists of continuous bilayer of phospholipid molecules in which globular proteins are embedded. The lipids are arranged in a bilayer with polar heads towards outside and non-polar tails towards Inside.
AIPMT (Screening)-2012
Cell : Structure and Functions
169062
Element necessary for the middle lamella
1 \(\mathrm{Ca}\)
2 \(\mathrm{Zn}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Cu}\)
Explanation:
A - Middle lamella is a jelly-like substances made up of calcium and magnesium pectate. Middle lamella is the first formed layer, present between the two adjacent cells. It is situated outside of the primary cell wall.
AIPMT-2001
Cell : Structure and Functions
169063
The right sequence of carriers, which involve in the transport of excess \(\mathrm{Na}^{+}\)ions out of the cell in salt resistant plants, is
1 Uniporter, Symporter
2 Symporter, Antiporter
3 Antiporter, Uniporter
4 Uniporter, Antiporter
Explanation:
D The right sequence of carriers which involved in the transport of excess \(\mathrm{Na}+\) ion out of the cell in salt resistant plants are Uniporter and Antiporter. Uniporter is a membrane transport protein that transports a single species of substrate (Charged or uncharged) across a cell membrane. Antiporter is a membrane protein that transports two molecules at the same time in the opposite direction.
AP EAMCET-2010
Cell : Structure and Functions
169065
Ultraphagocytosis (colloidopexy) is intake by cell of
1 Chromagen particles
2 Small colloidal particles
3 Large colloidal particles
4 It is very quick phagocytosis
Explanation:
B Phagoytosis or cell eating is the process by which a cell engulfs a solid particle and digests it . Phagocytosis occurs in specialized cells in which plasma membrane ingests macrophages, neutrophils and other white blood cells (smaller colloidal particles). Ultraphagocytosis is uptake of macromolecules and larger energy rich particles but intake by cell of small colloidal particle.
VMMC-2008
Cell : Structure and Functions
169066
In fluid mosaic model of plasma membrane
1 Upper layer is non-polar and hydrophilic
2 Polar layer is hydrophobic
3 Phospholipids form a bimolecular layer in middle part
4 Proteins form a middle layer
Explanation:
C Fluid mosaic model of the plasma membrane was proposed by S. J. Singer and Garth L. Nicolson 1972. According to this model, the plasma membrane is a phospholipid bilayer in which the proteins cholestrol and carbohydrates are incorporated which give it a mosaic like appearance. In Phospholipids layer upper or outer part like hydrophilic and polar heads of the lipid molecules are arranged on the outer side and inner side of the bilayer hydrophobic \& non-polar tails are present. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell.
