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Worksheets0654_2018_ON_QP_22_Bio
Total questions: 13
Worksheet time: 13mins
1. What are the optimum conditions of pH and temperature for the action of protease in the stomach?
pH-2, temperature/ °C-27
pH-2, temperature/ °C-37
pH-7, temperature/ °C-27
pH-7, temperature/ °C-37
2. What will cause plant leaves to turn yellow?
a lack of magnesium in the soil
a lack of starch in the leaves
a reduction in the rate of photosynthesis
a reduction in the rate of respiration
3. The diagram shows part of the digestive system.
Which of the labelled parts produce digestive enzymes, absorb water and store bile?
produce digestive enzymes-P, absorb water-Q, store bile-R
produce digestive enzymes-Q, absorb water-R, store bile-P
produce digestive enzymes-R, absorb water-S, store bile-P
produce digestive enzymes-S, absorb water-P, store bile-R
4. Plant cells are placed in a solution with a water potential higher than the cells.
Which row is correct?
movement of water-enters cells, volume of vacuole-decreases
movement of water-enters cells, volume of vacuole-increases
movement of water-leaves cells, volume of vacuole-decreases
movement of water-leaves cells, volume of vacuole-increases
5. Water is taken in through the roots and lost from the leaves of tall trees.
What enables this to happen?
active transport by the xylem vessels
pressure from the roots
translocation in the phloem
transpiration loss from the leaves
6. What is meant by respiration?
breakdown of protein
sweating to lose heat
the function of lungs
the release of energy
7. What is the equation for aerobic respiration?
6CO2 + 6H2O → C6H12O6 + 6O2
6CO2 + C6H12O6 → 6O2 + 6H2O
6O2 + 6H2O → C6H12O6 + 6CO2
6O2 + C6H12O6 → 6CO2 + 6H2O
8. To which environmental stimulus is a plant root responding when it grows downwards?
a decrease in soil water content
light falling on the leaves of the plant
rising temperature
the force of gravity
9. What is an advantage of asexual reproduction compared with sexual reproduction?
A specific disease is less likely to spread throughout the whole population.
It increases variation in the offspring.
It produces offspring more rapidly.
It requires two parents.
10. The diagram shows part of a flower.
What is structure P and what type of pollination is used by the flower?
structure P - stamen, type of pollination - insect-pollination
structure P - stamen, type of pollination - wind-pollination
structure P - stigma, type of pollination - insect-pollination
structure P - stigma, type of pollination - wind-pollination
11. A man breeds small mammals in which the fur colour is black or white. The allele for white is dominant to black.
If he chooses a pair of heterozygous white mammals to breed together, which proportion of the offspring mammals will be black?
none of them
about a quarter
about half
all of them
12. The diagram shows part of the carbon cycle.
Which arrow represents plant respiration?
A
B
C
D
13. Which gas does not contribute to acid rain?
carbon dioxide
methane
oxides of nitrogen
sulfur dioxide
