Cells

Question 1

Mitochondrion

Answer 1

Energy is transferred in the form of atp in the mitochondria and trsport3d to where it is needed in the cell (power hose/holder)

Question 2

Function of plasmadesma(ta)

Answer 2

Pore allow cytoplasmic threads to connect the cytoplasm of neighboring cells

Question 3

Function of intercellular air space

Answer 3

Contains air (O,CO2 etc)

Question 4

Function of cell wall

Answer 4

-Rigid and gives shape to plant cell
-Protects cell contents and prevents the plant from bursting
-enables water and dissolved substances to pass freely thorough

Question 5

Function of vacuole

Answer 5

-provides turbidity to plant cell
-regulates the water content of cells
-pigments in it gives colour to some fruit and flowers
-stores salutes, such as minerals

Question 6

Chloroplast function

Answer 6

Contain the green pigment chlorophyll which absorbs sunlight during photosynthesis

Question 7

Cytosol function

Answer 7

-site of most chemical reaction

-transports minerals ,dissolved nutrients and gases by diffusion

-it is the fluid in which organelles are found

90% water

Question 8

Function of the nucleus

Answer 8

Storing cell’s hereditary material /DNA

Question 9

Cell membrane

Answer 9

Controls the movement if substances into and out of the cell

-differentially permeable membrane

Question 10

Nucleoplasm

Answer 10

Contains free nucleotides

Question 11

Nucleoplasm

Answer 11

Contains free nucleotides

Question 12

Nuclear membrane

Answer 12

Double membrane surrounding nuclear material

Pores for transport

Question 13

Nuclear pore

Answer 13

Allows connection within cytoplasm.

Question 14

Nucleolus

Answer 14

Stores /makes ribosonal RNA

Question 15

Endoplasmic reticulum (smooth)

Answer 15

Facilitates transport of large molecules within cytoplasm

Question 16

Chromatin material

Answer 16

-consists of chromosomes made of DNA
-the genetic material of the cel

Question 17

Endoplasmic reticulum (rough )

Answer 17

Facilitates transport of large molecules within cytoplasm

Question 18

Ribosome

Answer 18

Site of protein synthesis

Question 19

Difference between plant and animal cells

Answer 19

Plant
-cell wall present
-plastids may be present
-large vacuole
-most plant cells have regular shape
Animal
-cell wall absent
-no plastids present
-vacuoles are small/absent
-most animal cells have an irregular shape

Question 20

Define diffusion

Answer 20

The movement of molecules from a region of high concentration to a region of low concentration

Question 21

Define osmosis

Answer 21

The movement of water molecules from a region of high to a region of low concentration

Question 22

Define active transport

Answer 22

The movement of substances from regions of lower concentration to regions high higher concentration by use of energy