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bio1

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File contents
F07
BIOLOGY 1
1 LIFE
What is special about living

organisms?

They do all of these:

Take in materials: FEED

RESPOND to changes

Increase in size: GROW

Remove wastes: EXCRETE

Use energy: RESPIRE

Change position: MOVE

Produce new organisms: REPRODUCE

CONTROL their internal conditions.

In simple organisms, the whole 'Body'

does all of these.
#
2 LIFE

Higher organisms have a variety of


specialised


CELLS e.g. Blood, Sperm;


TISSUES e.g. Muscle, Bone;


ORGANS e.g. Stomach, Kidney.
#
3 CELLS
Apart from the non-cellular viruses
and the simple bacteria, all organisms
are made of CELLS.

All cells have MEMBRANE (M),
               NUCLEUS (N),
               CYTOPLASM (C).

Plant cells also have VACUOLES (V),
CELL WALL (W).

o
M N C
M

MEMBRANE: Fat protein
'sandwich'; lets pass
water and gases, but
SELECTIVELY PERMEABLE
to other substances.

Continues through the
cell as ENDOPLASMIC
RETICULUM - vast
surface area for
transport of materials
in/out of cell.
p
0
N

NUCLEUS: Storage of
information (coded in
GENES on CHROMOSOMES)
to control cell
function and cell
division.

CELL WALL: Made of

CELLULOSE: Supports and
protects the cell.

VACUOLE: Fluid-filled
'space'.
p
0
C

CYTOPLASM: contains
various organelles:

RIBOSOMES: Make
proteins from
amino-acids as (gene)
code.

MITOCHONDRIA: release
energy from food
(as A.T.P.)

CHLOROPLASTS (plants)
capture light energy.
p
1
#
4 CELL DIVISION
There are two types of cell division:

MITOSIS and MEIOSIS.
o
A B C D E F
A
                     MITOSIS�MEIOSIS
������������������������������������
Number of divisions:    1   �   2
                            �
Number of cells             �
produced:               2   �   4
                            �
Chromosomes                 �
(cf. parent):         Same  � Half
                            �
Cells identical?       Yes  �   No
                            �
Occurs in forming:     All  � Gametes
                      cells � only
B
MITOSIS

1) Chromosomes

   appear

   replicated.


2) Spindle forms.
p
2
C
MITOSIS (continued)

3) Chromosomes
   line up on
   spindle and
   separate.

4) New identical
   nuclei are
   formed.
p
3
D
MEIOSIS

1) Chromosomes

   pair.


2) Replication.
p
4
E
MEIOSIS (continued)

3) Spindle forms.

   Chromosomes

   line up on

   spindle and

   separate.

4) First division.
p
5
F
MEIOSIS (concluded)

5) New spindles
   form for second
   separation of
   chromosomes.

6) Second division
   produces 4
   gametes.
p
6
#
T
#1
1
(a) The release of energy from food is

    known as .....?

(b) The removal of waste products is

    known as .....?
2
~
RESPIRATION
~
EXCRETION
#2
1
(a) All living organisms have an

    ability to ..... their internal

    conditions.

(b) When external conditions change,

    living organisms are able to ......
2
~
CONTROL
~
ADAPT
RESPOND
#3
3
What is the outermost layer of:

(a) a plant cell?

(b) an animal cell?
2
~CELL
WALL
~CELL
MEMBRANE
#4
3C
Which cell organelle is responsible

for protein manufacture?
1
RIBOSOME
#5
3
Which cell organism is responsible

for:

(a) the release of energy?

(b) the control of cell activity?
2
~
MITOCHONDRION
~
NUCLEUS
#6
3N
What is a plant cell wall made from?
1
CELLULOSE
#7
3C
Green plants contain chlorophyll to

capture light energy; in which

organelle is it found?
1
CHLOROPLAST
#8
3M
(a) The cell membrane is best

    described as ..... permeable.

(b) The continuation of the membrane

    through the cell is the .....

    .....

2
~
SELECTIVELY
~
ENDOPLASMIC RETICULUM
#9
4
A particular cell has 10 chromosomes.

How many in cells produced from it by:

(a) mitosis?

(b) meiosis?
2
~
10
TEN
~
5
FIVE
#10
4
Gametes are formed by .....?
1
MEIOSIS
#11
4D
In which type of cell division do the

chromosomes pair?
1
MEIOSIS
#12
4C
Which type of cell division produces

identical cells?
1
MITOSIS
e
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00000f00  53 49 53 0d 65 0d                                 |SIS.e.|
00000f06
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bio1.m1
bio1.m2
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