BECE Science 2 — Questions and Answers
Question 1: Which gas do plants absorb from the atmosphere during photosynthesis?
- Oxygen
- Nitrogen
- Carbon dioxide (Correct answer)
- Hydrogen
Correct answer: Carbon dioxide
Plants absorb carbon dioxide (CO₂) from the air and use it along with water and sunlight to produce glucose during photosynthesis.
Question 2: What is the chemical formula for water?
- CO₂
- H₂O (Correct answer)
- NaCl
- O₂
Correct answer: H₂O
Water is composed of two hydrogen atoms bonded to one oxygen atom, giving it the formula H₂O.
Question 3: Which part of the human body produces insulin?
- Liver
- Kidney
- Pancreas (Correct answer)
- Stomach
Correct answer: Pancreas
The pancreas produces insulin, a hormone that regulates blood sugar (glucose) levels in the body.
Question 4: What type of energy is stored in food?
- Kinetic energy
- Chemical energy (Correct answer)
- Nuclear energy
- Thermal energy
Correct answer: Chemical energy
Food stores chemical energy in the bonds of molecules like carbohydrates and fats, which is released during cellular respiration.
Question 5: Which planet is known as the Red Planet?
- Venus
- Jupiter
- Saturn
- Mars (Correct answer)
Correct answer: Mars
Mars appears red due to iron oxide (rust) on its surface, earning it the nickname the Red Planet.
Question 6: What is the function of the ribosomes in a cell?
- Energy production
- Protein synthesis (Correct answer)
- DNA replication
- Waste removal
Correct answer: Protein synthesis
Ribosomes are cell organelles responsible for synthesizing proteins by translating messenger RNA sequences.
Question 7: Which of the following is a conductor of electricity?
- Wood
- Rubber
- Copper (Correct answer)
- Plastic
Correct answer: Copper
Copper is a metal with free electrons that allow it to conduct electricity efficiently, making it widely used in wiring.
BECE Science 2
Which gas do plants absorb from the atmosphere during photosynthesis?