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Who is the best at IGCSE biology?
Flashcards
100 cards
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Practice quiz
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Host live
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Questions
100
Answers
1
Translocation moves organic solutes from sink to source
False
True
2
What is the role of the loop of Henle in osmoregulation?
Reabsorbs potassium and hydrogen ions
Allows for reabsorption of water
Forms a blood filtrate
Ensures proteins are not filtered from the blood
3
A
SIGN
of kidney disease
Loss of appetite
Swelling in face, legs, hands, and feet
Fatigue
Persistent generalized itching
4
What happens to enzymes as the concentration of the substrate increases?
Enzyme activity continues
Enzyme activity decreases
Substrate concentration becomes a limiting factor
Enzyme activity increases
5
Cellular respiration equation
glucose + oxygen yields carbon dioxide + water +ATP energy
6CO2+6H2O ---> C6H12O6+6O2
C6H12O6+6O2---> 6CO2+6H2O+ATP
Chris plus Chris equals little Chris
6
Antibiotic resistance is an example of evolution. Which of the following shows the sequence of events leading to this?
Natural selection > mutation > use of antibiotic
Mutation > use of antibiotic > natural selection
Mutation > natural selection > use of antibiotic
Natural selection > use of antibiotic > mutation
7
He wrote
The Origin of Species
, where the evolution is linked closely to Ecology
Linnaeus
Darwin
Lamarck
Bacon
8
The heart chamber with the thickest walls is
the left ventricle
the left atrium
the right atrium
the right ventricle
9
Kidney disease
Crohn's
nephritis
cholecystitis
encephalitis
10
The control centre for Thermoregulation in humans is
Hypothalamus
Pancreas
Islets of Langerhans
Thermoreceptors
11
After testing this leaf for starch what colour would you expect the leaf and black strip to be?
Leaf - yellow, black strip - yellow
Leaf - black, black strip - yellow
Leaf - black, black strip - black
Leaf - yellow, black strip - black
12
The Central dogma in molecular biology is
protein -> DNA -> RNA
DNA -> RNA -> Protein
DNA -> Protein -> RNA
RNA -> DNA -> Protein
13
What are the four bases of DNA?
None of the them
Adenine, Purines, Pryimidines, Cytosine
Phosphate, Deoxyribose, Nitrogen base, ATP
Thymine, Adenine, Cytosine, Guanine
14
An effector in thermoregulation could be
Sweat glands
Thyroxine
Shivering
Thermoreceptor
15
How many daughter cells are produced if a cell divides by mitosis 5 times?
64
10
32
16
16
Bile is useful in the digestion of
starch
protein
fat
sucrose
17
Fertilisation occurs in the ____
Cervix
Uterus
Ovary
Fallopian tube
18
Cells that can potentially become any other type of cell are:
Adult stem cells
Embryonic stem cells
Differentiated cells
Unipotent cells
19
Eukaryotic cells form unicellular or multicellular organisms?
True
False
20
What pattern of inheritance is shown?
Autosomal dominant
codominance
sex linked recessive
sex linked recessive
21
What is the main difference between reflex and voluntary action?
voluntary actions only use muscles
reflexes use the brain while voluntary actions don't
there are no differences
reflexes don't use the brain while voluntary actions do
22
What is produced in the Pancreas?
Starch and glucose
Amylase, lipase and protease
Protein and cahbohydrates
Sugar and glucose
23
Transpiration is when...
water moves from high water potential to low water potential
Sugars are moved through the plant
You sweat during exercise
water is lost through the stomata
24
Active transport is needed to
move minerals ions from the roots into the soil.
move salt ions from the gut into the kidney
move minerals ions from the soil into the plant roots
move glucose ions from the kidney into the blood
25
A cross between a yellow Pikachu and a red Hermie results in orange offspring.
dihybrid cross
codominance
multiple allele
sex linked
26
Which flower structure produces pollen grains?
Stigma
Anther
Carpel
Filament
27
The flowchart represents some of the stages of genetic engineering. A suitable description of stage X would be...
insert required gene into bacterial plasmid.
insert required gene into host bacterial cell.
insert bacterial plasmid into source chromosome.
insert bacterial plasmid into required gene .
28
the genetic constitution of an individual organism is a....
DNA
genotype
RNA
phenotype
29
Which cells have a cell membrane?
plant
animal
Blood cells
Or all three
30
The beating sound your heart makes, comes from?
Valves closing
The heart skipping beats
Your ears playing tricks on you
Blood going in the wrong direction
31
Erythrocytes are red blood cells
false
true
32
Abnormally slow heart action
Bradycardia
Tardycardia
Turtlecardia
Hypertrophy
33
What bacteria changes N2 to NH3 in the nitrogen cycle?
Nitrogen-Fixing Bacteria
Bacteria
Animal waste
Denitrifying Bacteria
34
Scientist commonly use bacteria in genetic engineering because bacteria
infect viruses
mutate quickly
naturally make insulin
can contain plasmids
35
What is the best marker for estimating kidney function?
Urinalysis
Glomerular Filtration Rate
Blood oxygen saturation
BMI
36
Which sex cell is responsible for the inheritance of gender?
Both Egg and Sperm
Neither Egg nor Sperm
Egg
Sperm
37
When you focus on a
nearby object
, what happens to your eye?
Lens gets longer and thinner
Ciliary muscle contract and Suspensory ligaments loosen
Lens gets smaller and fatter
Ciliary muscles relax and Suspensory ligaments tighten
38
Analysis that involves scientific tests used to measure the physical features of food products
Qualitative analysis
Quantitative analysis
39
which of the following is not found in prokaryotic cells
cell wall
ribosomes
mitochondria
cytoplasm
40
? = Stroke Volume (SV) x Heart Rate
Resting Heart Rate
Cardiac Output
Systolic pressure
Ventilation rate
41
Genetic engineering is...?
growing an organisms genetic sequence
copying an organisms genetic sequence
changing an organisms genetic sequence
transcribing an organisms genetic sequence
42
What is the name of the blood vessels that supplies the kidney with blood?
Renal Artery and Vein
Cerebral Artery and vein
Hepatic Artery and Vein
Pulmonary Artery and Vein
43
What is the monomer of protein?
Nucleotide
Amino acid
Fatty acid
monosaccharide
44
Which of the following is false about red blood cells?
RBCs are plentiful in mitochondria
They are biconcave in structure
They do not use up the oxygen they transport
RBCs contain about 280 million hemoglobin molecules
45
The term genetic engineering refers specifically to which of the following methods?
in vitro fertilization
artificial selection
recombinant DNA technology
genetic variation
46
Who was the Father of genetics?
Charles Darwin
Gregor Mendel
James Watson
Ivan Pavlov
47
Why, when testing for starch, do we place the leaf in ethanol?
To soften it
So chlorophyll is extracted
To make it easy to spread out
To destroy membranes
48
Stomata close when the guard cells:
become turgid
lose water
gain chloride ions
gain potassium ions
49
Ovulation is stimulated by which key hormone
LH
ADH
FSH
oxytocin
50
What bonds hold together DNA strands.
Hydrogen bonds
Ionic bonds
Dative covalent bonds
Covalent bonds
51
What is the largest organelle in most cells?
mantle
membrane
nucleus
cytoplasm
52
What type of microorganism is undertaking extracellular digestion in this picture?
Plasmodium
virus
bacteria
fungus
53
The area of biology devoted to the study of fungi is known as?
Hyphology
Mycology
Teratology
Sporology
54
Benedict's Solution has a positive test that changes...
Blue to Orange
Blue to Purple
Brown to Black
Pink to Red
55
What is translocation?
The movement of carbon dioxide through a plant
The movement of water through a plant
The movement of oxygen through a plant
The movement of dissolved sugars through a plant
56
Which is the definition of evolution?
genetic differences in a species
the appearance of new life forms
the change of species over time
parents passing traits to offspring
57
This is active transport because...
It goes with the concentration gradient and requires ATP
It does not go with the concentration gradient but uses ATP
It goes with the concentration gradient but requires no ATP
It doesn't go with the concentration gradient nor uses ATP
58
Carries amino acids to the ribosome during translation to help build an amino acid chain
Transcription
Ribosomal RNA (rRNA)
Messenger RNA (mRNA)
Transfer RNA (tRNA)
59
Where in the kidney does ultrafiltration occur?
PCT
Loop of Henlė
Glomerulus
DCT
60
What do plants do with absorbed nitrogen?
Use it as a natural pesticide
Use it to build proteins
Use it for cellular respiration
Use it for photosynthesis
61
Ecosystems are made up from
bionic and abiotic features.
biotic and abiotic features.
biotic and abionic features.
bionic and abionic features.
62
Activation energy in biology
is the energy required to start the reaction
is involved in formation of complex molecules only
increases in presence of enzymes
increases with increase in temperature
63
What does thigmotropism do?
Attract a plant to gravity.
Attract a plant to touch.
Attract a plant to water.
Attract a plant to sunlight.
64
The right side of the heart is..
Oxygenated
Deoxygenated
65
What system is the pancreas apart of?
The lymphatic
The nervous
The endocrine
The reproductive
66
¿Qué es la homeostasis?
Una capacidad del cuerpo para generar hormonas por el sistema digestivo
Capacidad que tiene el cuerpo para reproducirse
Capacidad del cuerpo para mantener y regular sus funciones internas
Una capacidad del cuerpo para digerir
67
What does a potometer measure?
potato growth
a plant's gas exchange rate
water uptake of a plant
potato elongation rate
68
What are some advantages of Sexual reproduction
There are none
Creates Diversity and the organism is more protected
Requires Less energy and there is no diversity
Requires less energy and only 1 parent is needed
69
Which structure is described as the "white" of the eye?
iris
cornea
pupil
sclera
70
Enzymes are ...
Biological catalysts
All of these
Globular proteins
unchanged by the reaction and reused
71
What happens before meiosis begins?
Homologous chromosomes separate
DNA is replicated in the original cell
Chromosomes line up at the equator of the cell
Mitosis must be completed
72
What is a tropism?
Directional Growth to an environmental stimulus
Non-directional growth response to an environmental stimuli
growth toward water
growth toward light
73
To calculare the rate of transpiration of a plant using a potometer we must know...
Distance bubble moves, time taken, radius of capillary tubing
Time taken, radius of tubing
Time taken for bubble to move, distance moved, water temperature
Distance bubble moves, radius of bubble, time taken
74
What is an advantage of Anaerobic respiration?
Produces energy
Releases more energy
Produces more lactic acid
Quick to release energy
75
When does anaerobic respiration occur?
When you're tired
When the body runs out of oxygen
When the body runs out of glucose
When you've just eaten
76
Pollination is ...
pollen tubules penetrating into the ovules.
pollen fertilising the ovaries.
pollen inserting into the style.
pollen transferring from the anther to the stigma.
77
List the levels of organisation in ecology.
organism, population, ecosystem, community
organism, population, communtiy, ecosystem
producers, herbivores, omnivores, carnivores
pyramid of energy, numbers & biomass
78
The 3 Main Scientists of DNA:
Watson, Crick, Franklin
Cheese, Spaghetti, France
Pauling, Hodgkin, Crick
Krebs, Hill, Franklin
79
Where does Oxygen-rich blood enter the heart?
Pulmonary Vein
Right Atrium
Superior Vena Cava
Aortic Valve
80
Into which cell will osmosis occur the fastest?
Q
none
P
R
81
The rate of diffusion is affected by:
Osmosis, active transport and temperature
Difference in Concentration, temperature and surface area
Cell walls, water availability, pH
Solubility of substance, reverse osmosis
82
The artery that carries oxygenated blood to the body tissues
Superior Vena Cava
Inferior Vena Cava
Aorta
Ventricle
83
What is the proper order of protein synthesis?
DNA, RNA, Translation, Transcription
DNA, Transcription, RNA, Translation, Protein
DNA, Translation, Transcription, RNA, Protein
DNA, Translation, RNA, Transcription, Protein
84
The cross Yy x yy shows a what cross?
heterozygous x heterozygous
homozygous x homozygous
heterozygous x homozygous
heterologous x homologous
85
What circulatory system do fish have
single
open, single
double
closed, double
86
Universal blood donor
A
O
B
AB
87
A motor neurone
takes messages from an effector to the CNS
takes messages from the CNS to an effector
takes messages from the CNS to a receptor
takes messages from a receptor into the CNS
88
What are the main factors affecting the rate of photosynthesis?
Water, Oxygen and Wind
Light, Temperature and Oxygen
Carbon dioxide, Oxygen and Light
Temperature, Carbon dioxide and Light
89
What are the four main factors affecting germination?
Light, Warmth, Wind, Oxygen
Light, Warmth, Moisture and Hydrogen
Light, Warmth, Moisture and Oxygen
Warmth, Moisture, Oxygen and Sodium
90
Cross a Bb parent with a bb parent. What percent of offspring would have a dominant phenotype?
75%
50%
25%
100%
91
What IGCSE grade do you hope to get in Biology?
6
9
8
7
92
Mutations within a DNA sequence are
natural processes that always affect the phenotype.
unnatural processes that are harmful to genetic diversity.
unnatural processes that always affect the phenotype.
natural processes that produce genetic diversity.
93
What is therapeutic cloning?
teleportation
cloning members
cloning animals
human tissues and organs
94
Do photosynthesis and respiration both occur at night?
No only photosynthesis can
No neither can
No only respiration can
Yes they both can
95
the splitting of 2 cells after mitosis is called
meiosis
apoptosis
cytokinesis
splicosmosis
96
Photosynthesis Equation
6H2O + 6O2 ---> C6H12O2 + 6O2
6H2O + 6CO2 ---> C6H12O6 + 6O2
6H3O + 6O2 --> C6H12O6 + 6O2
H2O + O2 ---> C6H12O6 + O2
97
Diffusion stops when?
Osmosis occurs
Facilitated diffusion starts
Solute is completely dissolved
Equilibrium is reached
98
The process of meiosis
begins with haploid cells and ends with haploid cells
begins with diploid cells and ends with haploid cells
begins with diploid cells and ends with diploid cells
begins with haploid cells and ends with diploid cells
99
Osmosis is the movement of water from a high-low conc across what?
Permeable membrane
Selectively permeable membrane
The Berlin wall
Partially permeable cell wall
100
What are stem cells?
Specialised cells
Cells found on a plant stem.
Differentiated cells
Undifferentiated cells
