Question 1 of 20 5,032 total questions
Which of the following food substances is incorrectly linked to its enzyme?
A Protein - trypsin
B Fat - lipase
C Sucrose - pepsin
D Starch - amylase
In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the
A cell walls are hardened
B cells are killed
C chlorophyll is dissolved out
D iodine will penetrate
A man suffering from obesity must avoid meals containing
A margarine and butter
B rice and beans
C carrots and oranges
D beef and fish
In which of the following organic compounds is the hydrogen-oxygen ratio equal to 2:1?
A Proteins
B Carbohydrates
C Lipids
D Vitamins
The following are the major reasons why the butterfly lays eggs under the surface of a leaf except to
A shade the eggs from the direct rays of the sun.
B protect the eggs from predators
C protect the eggs from being washed away by rain drops
D camouflage the eggs
Transportation of water in the xylem tissue involves the following except
A root pressure
B capillary action
C transpiration pull
D translocation
Which of the following statements ls true about transpiration? It is the
A loss of water in the form of vapour from the surface of the’ leaf
B loss of water in the form of vapour from the surface of the root
C absorption of water in the form of vapour from the body of the pint
D movement of water through the body of the plant.
The part labelled III is the
A albumen
B chalaza
C yolk
D air space
The parts that supply food and water to the developing embryo are labelled
A I and II
B III and V.
C V and VI
D I and III
Which of the following statements about the development of the foetus is not correct?
A The circulatory system of the foetus is directly connected to the maternal blood vessels
B The foetus depends on the mothers blood for its food and oxygen
C The foetus is surrounded by a water sac
D Food and oxygen are carried across the placenta to the embryo’s blood
The relationship between the retina and the brain is similar to that between the
A cochlea and the auditory nerve
B cochlea and the brain.
C cochlea and the semi-circular canals
D eardrum and the brain
The ear pinna is strengthened by
A blood pressure.
B cartilage
C bone
D turgor pressure
The organ that receives reduced flow of blood during vigorous exercise is the
A brain
B heart
C lung
D limb
The excretory system in mammals consists of the following parts except
A two kidneys
B two ureters
C two bladders
D one urethra
The following characteristics are associated with the mammalian lungs except
A large surface area
B expandable lungs
C moist surface
D highly vascularized
A pulse is best described as
A contraction of arteries to let out blood.
B contraction of veins to allow blood into them
C dilation of arteries to accommodate blood rushing through.
D pumping action of the heart to move blood round the body.
The inorganic components of bone consist of
A magnesium, sodium and calcium
B magnesium, phosphorus and calcium
C sodium, phosphorus and calcium,
D potassium, magnesium and calcium
The axial skeleton is composed of the
A skull and vertebral column
B limbs and girdles
C atlas and axis.
D radius and ulna
Excretion in Paramecium sp. is by diffusion because
A its habitat is water and moist places
B it has simple, small and few internal organs
C it has a large surface area to volume ratio.
D it has a large efficient meganucleus.
In cellular respiration energy is made available to organisms by
A removal of a phosphate group from ADR
B breaking off a phosphate group from ATP
C adding a phosphate group to glucose
D breaking off a hydrogen ion from NADPH
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