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WorksheetsGRADE 7 - MST 2 REVEIW
Total questions: 16
Worksheet time: 8mins
Glucose is first formed from ... during photosynthesis
water
oxygen
carbon dioxide
photosynthesis
When glucose is formed more quickly than it it used up, the excess glucose is changed to ... for storage
starch
carbon dioxide
oxygen
glucose
What are the essential substance needed for plant to absorb the light.
photosynthesis
chlorophyll
stomata
glucose
If there is no glucose, there will be no ... on the ...
starch, stem
starch, leaves
glucose, leaves
glucose, stem
The process of photosynthesis is ...
C6H12O6 + O2 --> H2O + CO2
H2O + CO2 --> C6H12O6 + O2
C6H12O6 --> H2O + CO2
H2O + CO2 --> C6H12O6
The rate of photosynthesis is affected by the external factors, except ...
light intensity
temperature
soil
carbon dioxide
Any factor that directly affects the rate of of chemical reaction called...
photosynthesis
limiting factor
light intensity
starch
Glucose is converted to ... except ...
oxygen
sucrose
starch
back to glucose
These are the important of photosynthesis, except ...
makes chemical energy available to animals
removes carbon dioxide
stored in fossil fuels
removes oxygen
Amino acids in leaves used to form ...
chlorophyll
proteins
fats
carbon dioxide
What describe the best of enzyme?
A protein that functions as a biological catalyst.
A catalyst that speeds up reactions in cells, being used up in the process
A protein that speeds up reactions in cells, being used up in the process
A carbohydrate that functions as a biological catalyst
What is a feature of all catalysts?
They are made from protein
They are broken down into a reaction
They are not changed by the reaction
They are changed by the rate of the reaction
What can be said to be true of all enzymes?
their maximum pH is 7
they move randomly in a solid
they are made of amino acid
their minimum pH is 7
What does the graph show?
Most enzymes work best around a neutral pH
Each enzymes works best at a different pH
Each enzyme works best over a narrow temperature range.
Enzymes work better in acidic conditions.
Find the best answer.
A
B
C
D
A student sets up an experiment to measure the rate of oxygen production of an aquatic plant when it is photosynthesizing.
Which two factors should be kept constant during the student’s experiment?
the size of funnel and the measuring cylinder
the size of the aquatic plant and the volume of the water in the beaker glass
the time exposed light and the size of the aquatic plant
the amount of gas produced in the measuring cylinder and the volume of water
