Cell - page 3

Cell How do cyclins control the cell cycle?
How do cyclins control the cell cycle?
Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks). A lone Cdk is inactive, ...
Cell Which is the longest of the mitotic stages?
Which is the longest of the mitotic stages?
The first and longest phase of mitosis is prophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surr...
Cell The walls of plant cells are largely composed of polysaccharides and proteins that are synthesized?
The walls of plant cells are largely composed of polysaccharides and proteins that are synthesized?
The primary cell wall of land plants is composed of the polysaccharides cellulose, hemicelluloses and pectin. Often, other polymers such as lignin, su...
Cell How many sides does each cell in the honeycomb have?
How many sides does each cell in the honeycomb have?
What shape are the cells in a section of honey bee honeycomb? It's a regular polygon with six sides… yes, it's a hexagon! length. How many cells are i...
Cell These are the primary cellular sites for the production of ATP?
These are the primary cellular sites for the production of ATP?
The mitochondria are the cell's primary site of ATP production accomplished through oxidative phosphorylation. What are the primary cellular sites for...
Cell What does the central vacoule do?
What does the central vacoule do?
Filling this space is an organelle called a central vacuole which is full of water. Bounded by a single membrane, this organelle functions as a combin...
Cell What is always true about cell size?
What is always true about cell size?
What is true about cell size?What determines the size of cells?Is cell size constant?Which of the following is true about a cell as it increases in s...
Cell What happen if a plant cell have no cell walls nubs?
What happen if a plant cell have no cell walls nubs?
Osmotically, water tends to move into the cell. This potential movement generates turgor pressure as the cell wall resists expansion. Without its wall...
Cell How does Oxygen and water ions and glucose move into the cell?
How does Oxygen and water ions and glucose move into the cell?
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as os...