Plant Physiology
Plant Physiology Review for Quiz 4/09/13
1. What is Plant Physiology?
Plant physiology is the study of the functions of plants.
2. What is the difference between phenotype and genotype
The difference between phenotype and genotype is that phenotype is the external characteristics and genotype is the genetic make up
3. What are the two types of cell walls?
The two types of cell walls are primary cell wall and secondary cell wall.
4. What are the most abundance components of the CELL WALL? And what are the three types? Also list their functions.
The most abundant component of the cell wall is Polysaccharide. The three are: Cellulose, Hemicellulose and Pectin. Cellulose has crystalline aggregates that give the cell wall its resistance; hemicellulose provides structure, regulation and storage to the cell wall and pectin is used as a gel agent.
5. What is the function of protein and approx. how much per cent of the cell wall is made of protein?
10% of the cell wall is made of protein and proteins two main functions are controls cellular expansion and prevents against invasive pathogens.
6. What gives the cell its rigidity and is the most abundant Non-Polysaccharide?
Lignin is the most abundant non-polysaccharide component and it gives the cell a great part of its rigidity.
7. 2 types of bonds make up the structure of the Primary Cell Wall what are they? Explain one.
Covalent and Non-Covalent Bonds; there are three covalent bonds: Glycocidic bonds which are between hemicellulose and pectin, Phenolic Coupling which are between pectin molecules and disulfer bridges which are between sulphated amino acids.
8. A cell without a cell wall is known as a protoplast
9. The formation of the Secondary Cell Wall is characterised by…
The mass synthesis between hemicellulose and cellulose
10. Define the following:
a. Electronegativity – the tendency for atoms to attract other atoms to itself
b. Adhesion- the forces that hold unlike
1. What is Plant Physiology?
Plant physiology is the study of the functions of plants.
2. What is the difference between phenotype and genotype
The difference between phenotype and genotype is that phenotype is the external characteristics and genotype is the genetic make up
3. What are the two types of cell walls?
The two types of cell walls are primary cell wall and secondary cell wall.
4. What are the most abundance components of the CELL WALL? And what are the three types? Also list their functions.
The most abundant component of the cell wall is Polysaccharide. The three are: Cellulose, Hemicellulose and Pectin. Cellulose has crystalline aggregates that give the cell wall its resistance; hemicellulose provides structure, regulation and storage to the cell wall and pectin is used as a gel agent.
5. What is the function of protein and approx. how much per cent of the cell wall is made of protein?
10% of the cell wall is made of protein and proteins two main functions are controls cellular expansion and prevents against invasive pathogens.
6. What gives the cell its rigidity and is the most abundant Non-Polysaccharide?
Lignin is the most abundant non-polysaccharide component and it gives the cell a great part of its rigidity.
7. 2 types of bonds make up the structure of the Primary Cell Wall what are they? Explain one.
Covalent and Non-Covalent Bonds; there are three covalent bonds: Glycocidic bonds which are between hemicellulose and pectin, Phenolic Coupling which are between pectin molecules and disulfer bridges which are between sulphated amino acids.
8. A cell without a cell wall is known as a protoplast
9. The formation of the Secondary Cell Wall is characterised by…
The mass synthesis between hemicellulose and cellulose
10. Define the following:
a. Electronegativity – the tendency for atoms to attract other atoms to itself
b. Adhesion- the forces that hold unlike