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WorksheetsPreliminary Questions Sec 3A
Total questions: 20
Worksheet time: 12mins
A
B
C
D
A
B
C
D
Which diagram represents a typical plant cell?
A
B
C
D
A student draws a diagram of a mitochondrion.
The diagram has a magnification of ×20 000.
The diagram is 5 cm long.
What is the actual size of the mitochondrion?
0.025 μm
0.25 μm
2.5 μm
25 μm
What happens during osmosis?
water molecules moves from high to low concentration without the use of energy
water molecules moves from high to low concentration with the use of energy
water molecules moves from high to low water potential without the use of energy
water molecules move from high to low water potential with the use of energy
Which of the following factors would not affect the rate of an enzyme-controlled reaction?
Temperature
pH
Concentration of enzyme
Concentration of product
Concentration of substrate
The graph shows the effect of temperature on an enzyme. Which statement explains the trend from 10-70oC?
As temperature increases, enzyme activity increases
70oC is the optimum temperature for this enzyme
As temperature increases, enzymes become denatured.
As temperature increases, enzyme activity decreases.
As temperature increases, molecules gain more kinetic energy and have more successful collisions
Guess the three types of the cell by identifying the chart. (from 1 to 3)
guard cell, palisade mesophyll cell, spongy mesophyll cell
guard cell,spongy mesophyll cell, palisade mesophyll cell
spongy mesophyll cell, guard cell, palisade mesophyll cell
spongy mesophyll cell, palisade mesophyll cell, guard cell
Plants manufacture their own supplies of carbohydrates.
What are the raw materials and waste products of this process?
Raw Material - carbon dioxide & chlorophyll
Waste product - oxygen
Raw Material - carbon dioxide & water
Waste product - oxygen
Raw Material - oxygen & chlorophyll
Waste product - carbon dioxide
Raw Material - oxygen & water
Waste product - carbon dioxide
The positive result of the sample for testing reducing sugar?
white emulsion
blue-black color change
turns into purple color
turns into orange with precipitate
Site where the lipid digestion starts.
C
D
E
F
Part of the water absorbed from the soil is lost via transpiration, some is used for photosynthesis and some used for .............?
maintaining turgidity of cells
stored in fruits
stored in leaves
stored in stem
What is calculated using a potometer?
rate of perspiration
rate of respiration
rate of transpiration
rate of absorption
What could increase the rate of water uptake (transpiration) by a plant?
Placing it in a refridgerator
placing a clear plastic bag over the plant (increases humidity)
removing the leaves from the plant
shining a bright light on the plant
Which vitamin is lacking when scurvy occurs
Vitamin A
Vitamin E
Vitamin C
Vitamin D
Where is the highest water potential?
in the flower
cannot be determined by picture.
in the vase
in the leaves
