Unit 2 Past Paper questions Flashcards
The role of stem cells in the human body is to produce…
a.) antibodies for defence
b.) new skin tissue to repair a cut
c.) enzymes for digestion
d.) hormones for communication
B
Hormones are …
a.) electrical messengers that travel along neurons
b.) electrical messengers that travel in the bloodstream
c.) chemical messengers that travel in the bloodstream
d.) chemical messengers that travel along neurons
C
in mice, the dominant form of one gene (B) determines black coat colour and the recessive
form (b) determines brown coat colour.
If two heterozygous mice were crossed, the expected phenotypes of the offspring would be
A all black
B all brown
C 3 black: 1 brown
D 1 black: 1 brown
C
Identify the nutrients from food that are absorbed into the lacteal.
A Glycerol and fatty acids
B Glucose and fatty acids
C Glucose an amino acids
D Glycerol and amino acids
A
Three students carried out an investigation into the effect of exercise on heart rate.
Each student measured their heart rate after completing the same exercises.
After each student’s heart rate returned to its resting rate, they repeated the process.
Which of the following would increase the reliability of the results?
A Increase the time spent exercising.
B Change the exercise location.
C Change the type of exercise each time.
D Increase the number of students exercising
D
Tissue stem cells can be transplanted to replace blood cells describe the feature of stem cells that allow them to be used in this way
They are unspecialised/ They can develop into different type of cells
Other than tissue name another type of stem cell
embryonic
Name the type of glands that release hormones into the bloodstream
endocrine
insulin has an effect on cells in the liver explain why insulin does not effect cells in other organs
They do not have the complementary receptor protein for insulin
Describe the reaction that occurs in the liver cells in response to insulin
Glucose is converted into glycogen
Name the cell produced when the nuclei of male and female gamete fuse
zygote
In what form is oxygen transported by red blood cells
oxyhaemoglobin
Give one structural feature of a red blood cell that allows it to carry out its function efficiently
Has a biconcave shape/ no nucleus
which of the following shows the pathway involved in a reflex arc after a person touches a
very hot object?
A Sensory neuron - brain motor - neuron
B Sensory neuron - inter neuron - motor neuron
C Motor neuron - brain sensory - neuron
D Motor neuron - inter neuron - sensory neuron
B
A recessive allele is expressed in an individual’s phenotype when the:
A dominant allele has not been inherited from either parent
B dominant allele has been inherited from only one parent
C recessive allele has been inherited from only one parent
D recessive allele has not been inherited from either parent.
A
The human body can be defended against disease by:
A lymphocytes producing phagocytes
B phagocytes producing antibodies
C antibodies producing lymphocytes
D lymphocytes producing antibodies
D
heart attack can be caused by a blockage to a blood vessel that supplies the heart tissue
with oxygen.
In which blood vessel does this blockage occur?
A Vena cava
B Pulmonary artery
C Coronary artery
D Pulmonary vein
C
Nutrients from food are absorbed into the villi in the small intestine.
Which of the following statements is correct?
A Glucose and fatty acids are absorbed into the lacteals.
B Glucose and amino acids are absorbed into the capillaries.
C Glycerol and fatty acids are absorbed into the capillaries.
D Glycerol and amino acids are absorbed into the lacteals
B
Name the structure that pulls the pairs of chromatids apart
spindle fibres
state the feature of stem cells that gives them the potential to develop into different types of cell
unspecialised
Name the organ that produces egg cells
Ovary
Name the chemical messengers carried from one part of the human body to another in the blood
Hormones
Name a transport structure through which these chemicals could flow to move
around the plant.
Phloem/xylem
Give a feature of a capillary network that increases the efficiency of
absorption of materials.
Thin walls/ large surface area
Name the process responsible for the movement of water and its
evaporation from the leafy shoot.
Transpiration
Water evaporates from leaves through stomata.
Name the cells surrounding the stomata that control their opening and
closing.
Guard cells
ame the cells, found in the early stages of an embryo’s development,
which have the potential to develop into specialised cells.
stem cells
State a reason, other than growth, why cells continue to be produced
throughout life.
repair of damaged tissue, replacement of dead/damaged cells
ymphocytes and phagocytes are specialised white blood cells.
Describe the different ways in which these two types of cell destroy
pathogens.
Phagocytes engulf pathogens, lymphocytes produce antibodies
Name the system in the human body which destroys pathogens.
Immune
Describe how blood glucose is returned from low to normal levels in the
human body
Glucagon is released from the pancreas, Glucagon travels in the blood, glucagon stimulates the liver to convert glycogen to glucose, glucose is released into the blood
Explain what is meant by the term homozygous
Both alleles are the same
Explain why having a large number of villi improves the efficiency of
absorption in the small intestine.
Provides a larger surface area
Identify the structural feature of a single villus, that is also found in an
alveolus, which increases the efficiency of absorption.
Thin walls/ extensive blood supply
In which parts of a green leaf would most photosynthesis occur?
A Palisade mesophyll and lower epidermis
B Lower epidermis and guard cells
C Guard cells and spongy mesophyll
D Spongy mesophyll and palisade mesophyll
D
State the ty[e of variation shown by tongue rolling
Discrete
Specialised cells allow organ Z to respond to hormone Y.
This is because the surface of the cells in organ Z have complementary
A synapses
B neurons
C effectors
D receptors
D
n increase in which of the following factors would decrease the rate of transpiration in
plants?
A Wind speed
B Humidity
C Surface area
D Temperature
B
hich of the following statements about blood cells is false?
A White blood cells are part of the immune system.
B Phagocytes are a type of white blood cell.
C Red blood cells contain haemoglobin.
D Phagocytes transport nutrients around the body.
D
Which of the following statements is true of villi?
A Blood capillaries absorb glycerol and amino acids.
B Blood capillaries absorb glucose and fatty acids.
C Lacteals absorb glycerol and fatty acids.
D Lacteals absorb glucose and amino acids.
C
Water is transported through the xylem vessels give one other function of the xylem
Transports minerals
Name the process responsible for the movement of water and its evaporation from the leafy shoot
transpiration
