The orientation of cellulose microfibrils in the cell wall plays a crucial role in determining cell shape. If a plant cell has cellulose microfibrils arranged predominantly perpendicular to the direction of cell elongation, what shape is the cell most likely to adopt?
Spherical
Elongated/Rod-like
Cuboidal
Irregular
Related Questions
The orientation of cellulose microfibrils in the cell wall plays a crucial role in determining cell shape. If a plant cell has cellulose microfibrils arranged predominantly perpendicular to the direction of cell elongation, what shape is the cell most likely to adopt?
Spherical
Elongated/Rod-like
Cuboidal
Irregular
Which enzymatic activity is primarily responsible for loosening the cell wall structure during cell expansion?
Cellulase
Pectin methylesterase
Expansin
Lignin peroxidase
The presence of which compound in the cell wall significantly contributes to the resistance of woody tissues to decay and compression?
Suberin
Cutin
Pectin
Lignin
Plasmodesmata are crucial for intercellular communication. Which component of the cell wall is specifically disrupted during plasmodesmata formation?
Secondary cell wall only
Primary cell wall only
Middle lamella only
Primary cell wall and middle lamella
Which of the following statements regarding the chemical composition of the secondary cell wall is INCORRECT?
It may contain lignin, suberin, or cutin.
It often has multiple layers, denoted as S1, S2, and S3.
It predominantly contains pectin and hemicellulose.
Cellulose microfibrils are arranged in a more parallel fashion compared to the primary wall.
Callose deposition is often associated with specific plant responses. Which of the following scenarios is LEAST likely to induce callose deposition?
Wounding or pathogen attack
Abscission zone formation
Pollen tube growth
Rapid cell elongation during growth
