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biology basics
biology basics
40 terms
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IGCSE
Flashcards
40 cards
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Practice quiz
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Questions
40
Answers
1
Estimate the percentage of total blood volume that is made up by each layer.
P 5% Q 40% R 55%
P 55% Q 5% R 40%
P 40% Q 55% R 5%
P 55% Q 40% R 5%
2
Which component of the blood does layer P contain?
platelets
plasma
white blood cells
red blood cells
3
Which of these structures is part of the circulation system?
S
U
Q
P
4
Which of these makes the cat breathe in?
diaphragm relaxes and the volume within the rib cage increases
diaphragm contracts and the volume within the rib cage increases
diaphragm contracts and the volume within the rib cage decreases
diaphragm relaxes and the volume within the rib cage decreases
5
What is the name for the organelle in a cell responsible for making proteins?
ribosomes
chloroplasts
mitochondria
cytoplasm
6
Which structure contains the genetic material used by the bacterium in reproduction?
B
C
A
D
7
Which structure controls the substances entering and leaving the bacterium?
D
C
B
A
8
The diagram shows a plant cell in different solutions. Which structure is labelled M?
vacuole
cell wall
cell membrane
nucleus
9
Which of these is the balanced chemical symbol equation for aerobic respiration?
C
D
A
B
10
The diagram shows a plant cell in different solutions. Which structure is labelled N?
vacuole
cytoplasm
cell wall
cell membrane
11
The diagram shows the bacterium
H. pylori
which causes stomach ulcers. Which of these is found in this bacterium?
chitin
cellulose
cytoplasm
nucleus
12
Which of these is an advantage of using biological control over chemical control?
it is quicker
it lasts a short time
it is specific
it leads to bioaccumulation
13
Which of these is the balanced chemical equation for photosynthesis?
6CO2 + 6H2O → C6H12O6 + 6O2
C6H12O → 2C3H6O3
C6H12O6 → 2C2H5OH + 2CO2
C6H12O6 + 6O2 → 6CO2 + 6H2O
14
The diagram shows a section of a frog heart. What is the name of the blood vessel labelled X?
pulmonary vein
aorta
vena cava
pulmonary artery
15
Which enzyme is released by the organism to digest starch?
ligase
lipase
protease
amylase
16
Which of these is the gas given off by the pondweed during photosynthesis?
oxygen
carbon monoxide
carbon dioxide
methane
17
What is the name for the organelle in a cell where photosynthesis takes place?
chloroplasts
mitochondria
ribosomes
cytoplasm
18
What is the name of the part labelled Q?
oesophagus
liver
duodenum
stomach
19
Which of these substances is a carbohydrate stored in plant cells?
glucose
starch
glycogen
chlorophyll
20
What is the maximum number of X chromosomes found in the nucleus of a sperm cell?
1
23
0
2
21
Which labelled structure produces bile?
A
C
B
D
22
What is the name for the organelle in a cell responsible for making ATP?
ribosomes
cytoplasm
chloroplasts
mitochondria
23
Name a group of organisms that is responsible for decomposition.
plants
bacteria
animals
fungi
24
Name the organelle shown in the drawing of a human cheek cell.
mitochondria
chloroplasts
ribosomes
nucleus
25
The table gives information about mitochondria in different human cells. What is the missing number?
0.33
75 000 000
3
10 000
26
What is the term used for plants at the beginning of food chains?
secondary consumers
producers
decomposers
primary consumers
27
Which of these structures is the adrenal gland?
Y
X
Z
W
28
Organisms are organised into different levels. What is the correct order of the levels?
organ, tissue, cell, system, organelle
system, cell, organelle, organ, tissue
organ, system, tissue, cell, organelle
organelle, cell, tissue, organ, system
29
Which of these is an example of positive phototropism?
a plant stem growing towards light
a plant stem growing upwards due to gravity
a plant root growing downwards due to gravity
a plant root growing away from light
30
What is the name of the part labelled P?
small intestine
large intestine
liver
stomach
31
Which type of organism is shown growing on the bread?
bacterium
virus
protoctist
fungus
32
Which of these is found in chlorophyll?
iron
calcium
magnesium
water
33
Which process is represented by the letter X?
feeding
respiration
decomposition
combustion
34
Which of these structures is not found in animal cells?
nucleus
cell membrane
mitochondrion
cell wall
35
Which type of cell does the diagram show?
animal
bacteria
plant
fungus
36
Which process is represented by the letter W?
feeding
decomposition
respiration
combustion
37
What is the total number of organelles shown in the diagram that absorb light?
12
1
11
6
38
Yeast is an example of which group of organism?
fungi
protoctists
bacteria
animals
39
Which part of this cell contains chlorophyll?
P
R
Q
S
40
Which of these structures is part of the digestive system?
S
P
U
Q
