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B2 Revision
Chromosomes come in...
How many daughter cells are made in meiosis?
B2 Revision
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B2 revision for GCSE Edexcel
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Answers
1
How many daughter cells are made in meiosis?
5
2
3
4
2
Chromosomes come in...
Threes
Fives
<p>Pairs</p>
Fours
3
What are plant stanols?
Foods that contain useful bacteria
A placebo
Food that lowers cholesterol
Food that contains nutrients for bacteria
4
What are the products of aerobic respiration?
Carbon dioxide and water
Water and energy
Lactic acid and energy
Carbon dioxide and energy
5
What is a flagella?
A piece of DNA found in the nucleus
<p>Part of a cell used for support</p>
Whip like structure that helps bacteria to move
Storage bubbles found in cells
6
What process adds carbon dioxide to the atmosphere?
Respiration
Photosynthesis
Osmosis
Transpiration
7
What direction do arteries take blood?
Away from the heart.
Towards the heart.
8
Which process of cell division is used in asexual reproduction?
Mitosis
Both
Meiosis
Neither
9
What process removes carbon dioxide from the atmosphere?
Transpiration
Photosynthesis
Osmosis
Respiration
10
What is a Zygote?
A mutation
The cell produced in mitosis
The cell formed when two gametes fuse
A drug
11
What is diffusion?
Molecules moving from high to low concentration
Molecules moving from low to high concentration
12
What is the name of the muscle contraction that pushes food through the digestive system?
<p>Peristalsis</p>
Transcriptase
Pepsin
<p>Abduction</p>
13
What is an enzyme?
A substrate
A hydrocarbon
More sausage
A biological catalyst
14
What are prebiotic foods?
Food that lowers cholesterol
Food that contains nutrients for bacteria
Foods that contain useful bacteria
A placebo
15
What side of the heart pumps oxygenated blood?
Right
Left
16
What acid is in the stomach?
Phosphoric acid
Nitric acid
Hydrochloric acid
Sulphuric acid
17
What is asexual reproduction in flowering plants sometimes called?
<p>Pollination</p>
<p>Fertilisation</p>
Genetically identical
Vegatitive reproduction
18
What enzyme is used to digest carbohydrates?
Pepsin
Lipase
Ligase
<p>Amylase</p>
19
What are probiotic foods?
Food that lowers cholesterol
Foods that contain useful bacteria
A placebo
Food that contains nutrients for bacteria
20
What do mitochondria do in a cell?
It is where enzymes are made
Give a cell energy
<p>It contains the instructions for a cell</p>
Stop things getting into a cell
21
What is the correct pairing sequence forDNA bases?
T-U
C-C
G-A
A-T
22
How many DNA bases make a codon?
5
4
2
3
23
Who discovered the structure of DNA?
James Watson and Francis Crick
James Crick and David Watson
<p>James Crick and Francic Watson</p>
Ryan Watson and James Crick
24
Why are mutations harmful?
A gene is not inherited
The chances of survival are not affected
Changing the DNA will not affect the organism
The organism is less likely to survive
25
In biology, what does GM stand for?
Great Mitochondria
Genetically Modified
General Motors
Gene Manipulation
26
What enzyme is used to digest fat?
Ligase
Pepsin
Amylase
Lipase
27
What does starch break down into?
Calcium
Glucose
Protein
Glycogen
28
How many daughter cells are made in mitosis?
5
2
4
3
29
What kind of bond holds base pair together?
Weak ionic bonds
Strong ionic bonds
Strong hydrogen bonds
Weak hydrogen bonds
30
What does the gall bladder do in the body?
Produces insulin
Breaks down starch
Stores bile
Produces sugar
31
Adenine always bonds with which other DNA Base?
Cytosine
Guanine
Uracil
Thymine
32
Where do stem cells come from?
an embryo
the liver
the brain
a muscle
33
What are the products of anaerobic respiration?
Carbon dioxide and water
Carbon dioxide and energy
Water and energy
Lactic acid and energy
34
Most human cells have how many chromosomes?
44
46
50
48
35
What is a mutation?
The transfer of amino acids
linking amino acids together
changing the structure of a gene
The coding by triplets
