CIE iGCSE Co-Ordinated Science B13.2 Hormones Exam Style Questions Paper 2
▶️ Answer/Explanation
Adrenaline is a chemical messenger secreted directly into the blood by the adrenal glands, which is the definition of a hormone.
It is not an enzyme (which catalyses reactions), a mineral salt, or a vitamin.
Adrenaline travels in the blood to target organs, increasing heart rate and preparing the body for action.
✅ Answer: (B)
It is not an enzyme (which catalyses reactions), a mineral salt, or a vitamin.
Adrenaline travels in the blood to target organs, increasing heart rate and preparing the body for action.
✅ Answer: (B)
▶️ Answer/Explanation
Gravitropism is a plant’s growth response to the direction of gravity.
A root growing downwards is growing in the direction of the gravitational pull, which is described as a positive response.
This is the opposite of a shoot, which grows upwards (negative gravitropism, but positive phototropism, towards light).
✅ Answer: (C)
A root growing downwards is growing in the direction of the gravitational pull, which is described as a positive response.
This is the opposite of a shoot, which grows upwards (negative gravitropism, but positive phototropism, towards light).
✅ Answer: (C)
▶️ Answer/Explanation
Colour vision depends on cone cells, which are light receptors that detect red, green and blue light.
Cone cells are located in the retina, so a fault in the retina’s cone cells causes colour blindness.
The cornea and lens focus light, and the iris controls pupil size, so none of these affect colour perception.
✅ Answer: (D)
Cone cells are located in the retina, so a fault in the retina’s cone cells causes colour blindness.
The cornea and lens focus light, and the iris controls pupil size, so none of these affect colour perception.
✅ Answer: (D)
▶️ Answer/Explanation
Glucagon is a hormone produced by the pancreas. Its function is to increase blood glucose concentration when it falls too low. It achieves this by stimulating the liver to convert glycogen into glucose and release it into the blood. Option B correctly matches glucagon, pancreas, and an increasing effect.
✅ Answer: (B)
✅ Answer: (B)
Question
Which type of chemical is adrenaline?
A enzyme
B hormone
C mineral salt
D vitamin
▶️Answer/Explanation
Ans : B