169093
Each phospholipid molecule in a cell membrane consists of:
1 one polar head and two non-polar tail
2 one polar head and one polar tail
3 one non-polar head and one polar tail
4 one non-polar head and one polar tail
Explanation:
A Plasma membrane consists of lipids (phospholipids and cholesterol), proteins and carbohydrates. Each phospholipid molecule in a cell membrane consists of one polar head and two non-polar tail. The head is polar hydrophilic lies toward the protein and held by hydrogen and ionic bond. The tails towards the centre non polar and hydrophobic held by vander wall force it ensure that non polar tails of sachurated hydrocarbon protective from aqueous environment.
J and K CET-2003
Cell : Structure and Functions
169094
The primary cell wall is mainly made up of
1 Lignin
2 Pectin
3 Cellulose
4 Protein
Explanation:
C The primary cell wall is composed of the polysaccharides cellulose, hemicelluloses and pectin. the structural integrity of a cell it provides protection against mechanical stress. Cellulose is a polysaccharide consisting of a linear chain of \(\mathrm{D}\)-glucose. A secondary cell wall is formed by the deposition of lignin.
WB JEE-2014
Cell : Structure and Functions
169095
Glycocalyx is associated with
1 Nucleolus
2 Plasma membrane
3 Nucleus
4 Nucleosome
Explanation:
B Glycocalyx is a surface layer that covers the cell membrane of many bacteria, epithelial cells or other cells. It is made up of glycoproteins, glycolipids and proteoglycans. It modulates adhesion between cells and also surface characteristics that determine adhesion and flow properties. Glycocalyx is mainly used in the recognition of the cell and also regulates the endothelial vascular tissues. Plasma membrane also known as plasma lemma it is a thick, sticky layer. It regulates the transport of materials entering and exiting the cell.
J and K CET-2011
Cell : Structure and Functions
169097
In which method of transport, in plasma membrane does not require carrier molecule?
1 Active transport
2 Facilitated diffusion
3 Simple diffusion
4 \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
Explanation:
C Simple diffusion occurs according to the differences in the concentration of molecules or along the concentration gradient. Diffusion means the transport of materials form a region of higher concentration to a region of lower concentration It does not require carrier molecules. Simple diffusion can be disrupted if the diffusion distance is increases. Facilitated diffusion is helped along a membrane transport channel. These channels are glycoproteins that allow molecules to pass through the membrane. Active transport - it requires energy. \(\mathrm{Na}^{+} \mathrm{P}^{+}\)pump is type of active transport that helps maintain resting potential in the cell.
169093
Each phospholipid molecule in a cell membrane consists of:
1 one polar head and two non-polar tail
2 one polar head and one polar tail
3 one non-polar head and one polar tail
4 one non-polar head and one polar tail
Explanation:
A Plasma membrane consists of lipids (phospholipids and cholesterol), proteins and carbohydrates. Each phospholipid molecule in a cell membrane consists of one polar head and two non-polar tail. The head is polar hydrophilic lies toward the protein and held by hydrogen and ionic bond. The tails towards the centre non polar and hydrophobic held by vander wall force it ensure that non polar tails of sachurated hydrocarbon protective from aqueous environment.
J and K CET-2003
Cell : Structure and Functions
169094
The primary cell wall is mainly made up of
1 Lignin
2 Pectin
3 Cellulose
4 Protein
Explanation:
C The primary cell wall is composed of the polysaccharides cellulose, hemicelluloses and pectin. the structural integrity of a cell it provides protection against mechanical stress. Cellulose is a polysaccharide consisting of a linear chain of \(\mathrm{D}\)-glucose. A secondary cell wall is formed by the deposition of lignin.
WB JEE-2014
Cell : Structure and Functions
169095
Glycocalyx is associated with
1 Nucleolus
2 Plasma membrane
3 Nucleus
4 Nucleosome
Explanation:
B Glycocalyx is a surface layer that covers the cell membrane of many bacteria, epithelial cells or other cells. It is made up of glycoproteins, glycolipids and proteoglycans. It modulates adhesion between cells and also surface characteristics that determine adhesion and flow properties. Glycocalyx is mainly used in the recognition of the cell and also regulates the endothelial vascular tissues. Plasma membrane also known as plasma lemma it is a thick, sticky layer. It regulates the transport of materials entering and exiting the cell.
J and K CET-2011
Cell : Structure and Functions
169097
In which method of transport, in plasma membrane does not require carrier molecule?
1 Active transport
2 Facilitated diffusion
3 Simple diffusion
4 \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
Explanation:
C Simple diffusion occurs according to the differences in the concentration of molecules or along the concentration gradient. Diffusion means the transport of materials form a region of higher concentration to a region of lower concentration It does not require carrier molecules. Simple diffusion can be disrupted if the diffusion distance is increases. Facilitated diffusion is helped along a membrane transport channel. These channels are glycoproteins that allow molecules to pass through the membrane. Active transport - it requires energy. \(\mathrm{Na}^{+} \mathrm{P}^{+}\)pump is type of active transport that helps maintain resting potential in the cell.
169093
Each phospholipid molecule in a cell membrane consists of:
1 one polar head and two non-polar tail
2 one polar head and one polar tail
3 one non-polar head and one polar tail
4 one non-polar head and one polar tail
Explanation:
A Plasma membrane consists of lipids (phospholipids and cholesterol), proteins and carbohydrates. Each phospholipid molecule in a cell membrane consists of one polar head and two non-polar tail. The head is polar hydrophilic lies toward the protein and held by hydrogen and ionic bond. The tails towards the centre non polar and hydrophobic held by vander wall force it ensure that non polar tails of sachurated hydrocarbon protective from aqueous environment.
J and K CET-2003
Cell : Structure and Functions
169094
The primary cell wall is mainly made up of
1 Lignin
2 Pectin
3 Cellulose
4 Protein
Explanation:
C The primary cell wall is composed of the polysaccharides cellulose, hemicelluloses and pectin. the structural integrity of a cell it provides protection against mechanical stress. Cellulose is a polysaccharide consisting of a linear chain of \(\mathrm{D}\)-glucose. A secondary cell wall is formed by the deposition of lignin.
WB JEE-2014
Cell : Structure and Functions
169095
Glycocalyx is associated with
1 Nucleolus
2 Plasma membrane
3 Nucleus
4 Nucleosome
Explanation:
B Glycocalyx is a surface layer that covers the cell membrane of many bacteria, epithelial cells or other cells. It is made up of glycoproteins, glycolipids and proteoglycans. It modulates adhesion between cells and also surface characteristics that determine adhesion and flow properties. Glycocalyx is mainly used in the recognition of the cell and also regulates the endothelial vascular tissues. Plasma membrane also known as plasma lemma it is a thick, sticky layer. It regulates the transport of materials entering and exiting the cell.
J and K CET-2011
Cell : Structure and Functions
169097
In which method of transport, in plasma membrane does not require carrier molecule?
1 Active transport
2 Facilitated diffusion
3 Simple diffusion
4 \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
Explanation:
C Simple diffusion occurs according to the differences in the concentration of molecules or along the concentration gradient. Diffusion means the transport of materials form a region of higher concentration to a region of lower concentration It does not require carrier molecules. Simple diffusion can be disrupted if the diffusion distance is increases. Facilitated diffusion is helped along a membrane transport channel. These channels are glycoproteins that allow molecules to pass through the membrane. Active transport - it requires energy. \(\mathrm{Na}^{+} \mathrm{P}^{+}\)pump is type of active transport that helps maintain resting potential in the cell.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Cell : Structure and Functions
169093
Each phospholipid molecule in a cell membrane consists of:
1 one polar head and two non-polar tail
2 one polar head and one polar tail
3 one non-polar head and one polar tail
4 one non-polar head and one polar tail
Explanation:
A Plasma membrane consists of lipids (phospholipids and cholesterol), proteins and carbohydrates. Each phospholipid molecule in a cell membrane consists of one polar head and two non-polar tail. The head is polar hydrophilic lies toward the protein and held by hydrogen and ionic bond. The tails towards the centre non polar and hydrophobic held by vander wall force it ensure that non polar tails of sachurated hydrocarbon protective from aqueous environment.
J and K CET-2003
Cell : Structure and Functions
169094
The primary cell wall is mainly made up of
1 Lignin
2 Pectin
3 Cellulose
4 Protein
Explanation:
C The primary cell wall is composed of the polysaccharides cellulose, hemicelluloses and pectin. the structural integrity of a cell it provides protection against mechanical stress. Cellulose is a polysaccharide consisting of a linear chain of \(\mathrm{D}\)-glucose. A secondary cell wall is formed by the deposition of lignin.
WB JEE-2014
Cell : Structure and Functions
169095
Glycocalyx is associated with
1 Nucleolus
2 Plasma membrane
3 Nucleus
4 Nucleosome
Explanation:
B Glycocalyx is a surface layer that covers the cell membrane of many bacteria, epithelial cells or other cells. It is made up of glycoproteins, glycolipids and proteoglycans. It modulates adhesion between cells and also surface characteristics that determine adhesion and flow properties. Glycocalyx is mainly used in the recognition of the cell and also regulates the endothelial vascular tissues. Plasma membrane also known as plasma lemma it is a thick, sticky layer. It regulates the transport of materials entering and exiting the cell.
J and K CET-2011
Cell : Structure and Functions
169097
In which method of transport, in plasma membrane does not require carrier molecule?
1 Active transport
2 Facilitated diffusion
3 Simple diffusion
4 \(\mathrm{Na}^{+}-\mathrm{K}^{+}\)pump
Explanation:
C Simple diffusion occurs according to the differences in the concentration of molecules or along the concentration gradient. Diffusion means the transport of materials form a region of higher concentration to a region of lower concentration It does not require carrier molecules. Simple diffusion can be disrupted if the diffusion distance is increases. Facilitated diffusion is helped along a membrane transport channel. These channels are glycoproteins that allow molecules to pass through the membrane. Active transport - it requires energy. \(\mathrm{Na}^{+} \mathrm{P}^{+}\)pump is type of active transport that helps maintain resting potential in the cell.
