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higher tier set Flashcards

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1
Q

Are the cells made in mitosis identical or varied?

A

Identical

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2
Q

Define active transport

A

Molecules moving from a low to high concentration

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3
Q

Define diffusion

A

Molecules moving from a high to low concentration

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4
Q

How are electron microscopes better than light microscopes?

A

Higher resolution and magnification

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5
Q

How are alveoli/villi adapted to maximise diffusion?

A

LSA, good blood supply, 1 cell thick

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6
Q

How do you calculate magnification?

A

Image size/ real size object

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7
Q

How do you change magnification on a light microscope?

A

change objective lens

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8
Q

How do you focus a light microscope?

A

Turn focusing wheel

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9
Q

How many cells are made in mitosis?

A

2

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10
Q

If an organism is larger, how does this affect the surface are to volume ratio?

A

Decreases

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11
Q

Name a prokaryotic cell

A

Bacterial

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12
Q

Name 2 eukaryotic cells

A

Animal and plant

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13
Q

What are stem cells?

A

Undifferentiated cells that can change into other type of cells

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14
Q

What do the water molecules move through in osmosis?

A

Semi permeable membrane

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15
Q

What dies active transport require?

A

Energy

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16
Q

What is a benefit of therapeutic cloning?

A

Cells cannot refuse

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17
Q

What is mitosis needed for?

A

Growth and repair

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18
Q

What is the cells wall made of?

A

Cellulose

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19
Q

What is the role of the cell membrane?

A

Contains what leaves and enters the cell

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20
Q

What is the role of the cell wall?

A

Strengthens and supports the cell

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21
Q

What is the role of the chloroplast?

A

Contains Chlorophyll that obtains light

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22
Q

What is the role of cytoplasm?

A

Site for chemical reactions

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23
Q

What is the role of mitochondria?

A

Site of respiration and releases energy

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24
Q

What is the role of the nucleus?

A

Controls the cells and contains DNA

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25
What is the role of the ribosomes?
Protein synthesis
26
What is the role of the vacuole?
To contain Cell sap
27
Where are the adult stem cells found?
Found in bone marrow
28
Where are chromosomes found?
Found in the nucleus
29
Where are embryonic stem cells found?
Found in Embryo
30
Where are meristems found?
Found in plant shoots
31
Which molecules move in Osmosis?
Water molecules
32
Why are cells specialised?
To function for a certain job
33
Define atomic number
Number of protons
34
Define mass number
Number of both protons and neutrons
35
How did Mendeleev arrange his periodic table?
By atomic weight
36
How do you separate a liquid from a solution?
By simple distillation
37
How do you separate a soluble solid from a solution?
By crystallisation
38
How do you separate an insoluble solid from a solvent?
By filtration
39
How do you separate liquids with two different boiling points?
By fractional distillation
40
How is the modern periodic table arranged?
By atomic number
41
How many electrons do group 0 elements have in their outer shell?
1 electron
42
How many electrons do group 1 elements have in their outer shell?
8 electrons, except from Helium
43
How many electrons do group 7 elements have in their outer shell?
7 electrons
44
State the reactivity of group 1 as you go down the group
Reactivity increases
45
State the reactivity of group 7 as you go up the group
Reactivity increases
46
What is a compound?
More than one elements joined together and cannot be separated by physical porcess
47
What is a mixture?
A number of elements/compounds that are together that can be separated by physical process
48
What is a group?
The vertical column in the periodic table
49
What is a period?
Horizontal row of the periodic table
50
What is an isotope?
Same atom of an element with a different neutron number
51
What is group 0 called?
The Nobel Gases
52
What is group 1 called?
Alkali Metals
53
What is group 7 called?
Halogens
54
What is the relative charge of a neutron?
Relative charge is neutral
55
What is the relative charge of a proton?
Relative charge is positive
56
What is the relative charge of an electron?
Relative charge if negative
57
What is the relative mass of a neutron?
Relative mass of a neutron is 1
58
What is the relative mass of a proton?
Relative mass of a proton is 1
59
What is the relative mass of an electron?
Relative mass of an electron is 1
60
What subatomic particle will you find in energy shells?
Subatomic particle is an electron
61
What subatomic particle will you find in the nucleus of an atom?
Subatomic particle in a nucleus of an atom is both proton and neutron
62
What two physical processes take place in fractional distillation?
Condensation and evaporation
63
Why are group 0 unreactive?
Because they have a full outer shell
64
Why did Mendeleev leave gaps in his periodic table?
He believed that there were more elements to be discovered
65
What is the main advantage of using nuclear power to generate electricity?
No Carbon dioxide emissions
66
What is the main disadvantage of using nuclear power to generate electricity?
Has to be stored for thousands of years
67
What is the main advantage of using wind to generate power?
Leaves no change towards the climate change
68
What is the main disadvantage of using wind to generate electricity?
Wind is not a reliable source
69
What is the main advantage of using solar power to generate electricity?
Leaves no change towards the climate change
70
What is the main disadvantage of using solar power to generate electricity?
Sunlight is not a reliable soirce
71
What is the main advantage of using biofuels to generate electricity?
Leaves no change towards the climate change
72
What is the main disadvantage of using biofuels to generate electricity?
Land gets taken up in order to let plants grow for the fuel
73
How does the resistance of an thermistor depend on temperature?
As temperature goes up, resistor goes down (T.U.R.D)
74
How does the resistance of light dependent resistor depend on a light intensity?
As brightness increase, resistance decreases. (B.I.R.D)
75
What is the unit of electrical resistance?
ohms
76
What equation links current (I), potential difference (V) and resistance (R)?
V= I*R
77
How are ammeters and voltmeters connected to a current?
Ammeter in series, Voltmeter in parallel.

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