Plasma membrane: X; Cytoplasm: Y; Nucleus: Z
Plasma membrane: X; Cytoplasm: Z; Nucleus: Y
Plasma membrane: Z; Cytoplasm: X: Nucleus: Y
Plasma membrane: Z; Cytoplasm: Y: Nucleus: X
Temperature: Cold; Light: Dim; Air: Damp
Temperature: Warm; Light: Dim: Air: Dry
Temperature: Cold; Light: Bright; Air: Damp
Temperature: Warm; Light: Bright; Air: Dry
Respiration (hours): 3; Photosynthesis (hours): 7
Respiration (hours): 4; Photosynthesis (hours): 6
Respiration (hours): 10; Photosynthesis (hours): 7
Respiration (hours): 10; Photosynthesis (hours); 6
Transplantation of human pancreas
Isolation of insulin from farm animals
Production of insulin by biofermentation
Stem cell therapy to replace diabetic patients’ pancreas with insulin producing cells
Mass = 1/1850, electric charge = -1
Mass = 1, electric charge = 0
Mass = 1, electric charge = +1
Mass = 4, electric charge = +2
|Which one of the following reactions shows the formation of a compound from two elements?|
Carbon dioxide + calcium hydroxide → calcium carbonate + water
Magnesium + sulfur → magnesium sulfide
Oxygen + copper(II) sulfide → copper(II) sulfate
Water → hydrogen + oxygen
|A small amount of a dense white powder was mixed with water in a test tube. None of the white powder sank to the bottom of the test tube. A few drops of universal indicator were added and the solution turned blue. What can you say about the nature of the white powder?|
A slightly soluble acid
A slightly soluble alkali
A soluble neutral substance
A very soluble alkali
Material A made of white paint
Material B made of red bricks
Material C made of aluminium
Material D made of layers of soil
|When a force is applied to a body, several effects are possible. Which of the following effects could not occur?|
The body changes direction.
The body slows down.
The body speeds up.
The mass of the body decreases.
|An iron ball of 10 kg sinks in water with a uniform speed of 2 m/s. Which of the following statements on the forces acting on the iron ball is correct?|
The downward force is equal to the upward force.
The downward force is less than the upward force.
The downward force is more than the upward force.
There is no force acting on the iron ball.
10 N acting downward, 25 cm to the right of the midpoint.
20 N acting upward, 25 cm to the right of the midpoint.
25 N acting downward, 20 cm to the right of the midpoint.
50 N acting upward, 10 cm to the right of the midpoint.
The toy car is moving at uniform speed.
The toy car’s highest speed is between 0 to 5 second.
The toy car’s highest speed is between 10 to 15 second.
The toy car’s speed increases from 0 to 5 second.
|The base area of four different pairs of snowshoes are shown below. Which pair of snowshoes should Jack buy if he does not want to sink into the snow while walking?|
0.2 square meter
0.3 square meter
0.4 square meter
0.5 square meter
|Jeremy wants to study the conversion of potential energy of a tennis ball to kinetic energy as it moves down a ramp. Which of the following apparatus is not needed to do the experiment?|