#1
What is the basic unit of life?
Cell
ExplanationFundamental building block of organisms
#2
Which organelle is known as the powerhouse of the cell?
Mitochondria
ExplanationProduces energy (ATP) through cellular respiration
#3
In the human body, where does the process of digestion primarily begin?
Mouth
ExplanationMechanical and chemical breakdown of food starts here
#4
Which of the following is a function of the circulatory system?
Transport of nutrients
ExplanationCarries essential substances to cells throughout the body
#5
Which of the following is an example of a monosaccharide?
Glucose
ExplanationSimple sugar, basic unit of carbohydrates
#6
In the context of genetics, what does the term 'allele' refer to?
Different versions of a gene
ExplanationAlternative forms of a gene
#7
What is the process by which plants make their own food using sunlight?
Photosynthesis
ExplanationConversion of light energy into chemical energy
#8
Which scientist is known for the theory of evolution by natural selection?
Charles Darwin
ExplanationProposed mechanism for how species evolve over time
#9
Which of the following is not a type of RNA?
sRNA
ExplanationSmall RNA, not involved in protein synthesis
#10
Which blood type is considered the universal donor?
O
ExplanationCan donate to any blood type without causing a reaction
#11
What is the role of chlorophyll in photosynthesis?
Absorb sunlight
ExplanationPigment that captures light energy for photosynthesis
#12
What is the scientific term for the process of cell division?
Mitosis
ExplanationDivision of a cell into two identical daughter cells
#13
Which organelle is responsible for detoxifying harmful substances in the cell?
Peroxisome
ExplanationContains enzymes that break down toxic materials
#14
What is the role of DNA in living organisms?
Genetic information storage
ExplanationContains instructions for development and function
#15
What is the function of white blood cells in the immune system?
Fight infections
ExplanationDefend against pathogens and foreign invaders
#16
Which hormone is responsible for regulating blood sugar levels?
Insulin
ExplanationLowers blood glucose levels by promoting uptake
#17
Which of the following is an example of a prokaryotic cell?
Bacterial cell
ExplanationLacks a nucleus and membrane-bound organelles
#18
What is the primary function of the respiratory system?
Exchange of gases
ExplanationBrings in oxygen and removes carbon dioxide
#19
What is the role of hemoglobin in the blood?
Transport of oxygen
ExplanationBinds to oxygen and carries it to tissues
#20
Which scientist is credited with discovering the structure of DNA?
Watson and Crick
ExplanationProposed double helix structure of DNA