AP BIOLOGY

THE CELL

STRUCTURE AND FUNCTION OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following organelles provides extra support for the cell, gives it shape, is mostly made up of cellulose, and found in plant cells?
A
endoplasmic reticulum
B
cell membrane
C
cell wall
D
nucleus
Explanation: 

Detailed explanation-1: -Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells. The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

Detailed explanation-2: -Plant cells contain vacuoles. In addition to storing wastes and water, the vacuole also helps to support the cell. This is because the liquid inside the vacuole exerts an outward pressure on the cell, much like the water inside a water balloon.

Detailed explanation-3: -The cell wall is located outside the cell membrane. It consists mainly of cellulose and may also contain lignin, which makes it more rigid. The cell wall shapes, supports, and protects the cell.

Detailed explanation-4: -Answer and Explanation: A central vacuole is the organelle in plant cells that stores water and helps to maintain the plant’s shape. The vacuole is similar to a big bag of water. When it is full, it presses on the cell wall, and helps the cell stay firm.

Detailed explanation-5: -The cytoskeleton is an important, complex, and dynamic cell component. It acts to organize and maintain the cell’s shape; anchors organelles in place; helps during endocytosis (the uptake of external materials by a cell); and moves parts of the cell in processes of growth and motility.

There is 1 question to complete.