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Question 1
What is the primary function of the mitochondria in a cell?
A) Protein synthesis
B) Energy production through cellular respiration
C) Storage of genetic material
D) Synthesis of lipids
Answer: B Rationale: Mitochondria are known as the powerhouse of the cell
because they produce ATP through cellular respiration, converting nutrients into
usable energy for cellular processes.
,Question 2
Which of the following is a characteristic of living organisms?
A) Inability to adapt
B) Lack of cellular organization
C) Reproduction and growth
D) Absence of metabolism
Answer: C Rationale: All living organisms share common characteristics including
reproduction, growth, response to stimuli, metabolism, and cellular organization.
Reproduction ensures species continuity.
Question 3
What is the chemical formula for glucose?
A) C₆H₁₂O₆
B) C₆H₁₀O₅
C) C₅H₁₀O₅
D) C₁₂H₂₂O₁₁
Answer: A Rationale: Glucose is a monosaccharide with the molecular formula
C₆H₁₂O₆, serving as a primary energy source in cellular respiration.
Question 4
Which system is responsible for transporting oxygen and nutrients throughout the
body?
A) Respiratory system
B) Digestive system
C) Circulatory system
D) Nervous system
Answer: C Rationale: The circulatory system, comprising the heart, blood vessels,
and blood, transports oxygen, nutrients, hormones, and waste products
throughout the body.
,Question 5
What is the pH range of a neutral solution?
A) 0-6
B) 7
C) 8-14
D) 14
Answer: B Rationale: A neutral solution has a pH of exactly 7, indicating equal
concentrations of hydrogen and hydroxide ions. Pure water is a classic example of
a neutral solution.
Question 6
Which of the following is a renewable energy source?
A) Coal
B) Natural gas
C) Solar energy
D) Petroleum
Answer: C Rationale: Solar energy is renewable because it is continuously
replenished by the sun and does not deplete natural resources, unlike fossil fuels
such as coal, natural gas, and petroleum.
Question 7
What is the boiling point of water at standard atmospheric pressure?
A) 80°C
B) 90°C
C) 100°C
D) 110°C
Answer: C Rationale: Water boils at 100°C (212°F) at standard atmospheric
pressure (1 atm), which is the temperature at which its vapor pressure equals
atmospheric pressure.
, Question 8
Which organelle contains the genetic material in eukaryotic cells?
A) Ribosome
B) Nucleus
C) Mitochondrion
D) Golgi apparatus
Answer: B Rationale: The nucleus houses the cell's DNA (genetic material) and
controls cellular activities by regulating gene expression and directing protein
synthesis.
Question 9
What is the SI unit of force?
A) Joule
B) Newton
C) Watt
D) Pascal
Answer: B Rationale: The Newton (N) is the SI unit of force, defined as the force
required to accelerate a 1-kilogram mass at a rate of 1 meter per second squared.
Question 10
Which blood type is considered the universal donor?
A) Type A
B) Type B
C) Type AB
D) Type O
Answer: D Rationale: Type O negative blood is the universal donor because it lacks
A, B, and Rh antigens, minimizing the risk of immune reactions in recipients of any
blood type.