Biology - Cell Structures

Question 1

What is the first stage of the cell cycle and what happens

Answer 1

Interphase-cells copy their chromosomes and organelles so they can have two copies of each.

Question 2

What is the second stage of the cell cycle and what happens

Answer 2

Mitosis-The membrane breaks down the chromosomes right in the center. The spindle organelles then connect onto the chromosomes and organelles which are seperated.

Question 3

What is the third stage of the cell cycle

Answer 3

Cytokinthesis-The spindle fibers then split the chromosomes and organelles into two groups with equal number of chromosomes and organelles on opposite sides. Later on the nucleus and cytoplasm divide into two cells to form two fully identical cells.

Question 4

How do you work out the cell cycle length?

Answer 4

LENGTH OF TIME IN STAGE = OBSERVED NUMBER OF CELLS IN STAGE divided by
TOTAL NUMBER OF CELLS OBSERVED times byTOTAL LENGTH OF CELL CYCLE

Question 5

What is diffusion

Answer 5

Diffision is the movement of anything generally from a region of higher concentration to a region of lower concentration.

Question 6

What is osmosis

Answer 6

Osmosis is the movement of water across a semipermeable membrane. Across this membrane water will tend to move from an area of high concentration to an area of low concentration.

Question 7

Osmosis in cells