The cell

Question 1

what is a cell

Answer 1

-It is the basic unit of life
-all multicellular organisms are made up of millions of cells

Question 2

Organisation of life

Answer 2

atoms- molecules- organelles- cells- tissue- organs- organ systems- organisms

Question 3

Organelle

Answer 3

Structures inside cells that perform specific functions. Eg: chloroplast and mitochondria

Question 4

Tissue

Answer 4

Groups of the same cells, with the same structure that work together to perform a common function. Eg: a group of stomach muscle cells called stomach muscle tissue

Question 5

Organ

Answer 5

Different tissues that work together to perform a common function

Question 6

Organ Systems

Answer 6

Different organs that work togther to perform a common function

Question 7

Cell Wall

Answer 7

-Only found in plant cells
-Surrounds the outside of the cell
-Made of cellulose
-None living, rigid and strong
- Function: provide shape strength and protection to the cell

Question 8

Cell Membrane

Answer 8

-Both plans and animal cells
-Surrounds cytoplasm, and is situated just inside the cell wall
-Living, thin, elastic
-Function: controls the movement of the substances in and out of cells

Question 9

Selective Permeable

Answer 9

Selects what goes in and out

Question 10

Cytoplasm

Answer 10

-All organelle float in the cytoplasm
-Jelly like medium
-Makes up majority of the cell content

Question 11

Vacuole

Answer 11

-Large permanent: plant cell
-Small temporary: animal cells
-large spaces in the cytoplasm, surrounded by tonoplast( vacuoles membrane). Space is filled with dissolved water, mineral salts,waste,and starch(cell sap).
-Function: acts as storage space for water and dissolves substances. Maintains tugor pressure on association with the cell wall

Question 12

Tugor Pressure

Answer 12

The pressure exerted by the vacuole and cell wall to keep the cell rigid

Question 13

Chloroplast

Answer 13

-Only in plants
-Contains chlorophyll (green pigment) that traps radiant and light energy
-Function: perform photosynthesis. Glucose is stores as starch in the vacuoles of plant cells.

Question 14

Nucleus

Answer 14

-Filled with nucleoplasm
-Surrounded by a nuclear membrane
-Contains DNA that carries all your hereditary information
-Function: controls hereditary characteristics
Controls all functions of the cell

Question 15

Mitochondrion

Answer 15

• Rod shaped organelle that occurs in both animal and plant cells
  -Has a folded inner membrane and a smooth outer membrane
  -Function:Perform respiration
  Provides cells with energy in the form of ATP