Science Topics Quiz

What is the basic structural and functional unit of all living organisms?

• tissue

• organ

• molecule

• cell

Which organelle is known as the powerhouse of the cell?

• Ribosomes

• Mitochondria

• Golgi Apparatus

• Endoplasmic Reticulum

What is the process by which plants, algae, and some bacteria convert light energy into chemical energy?

• Respiration

• Photosynthesis

• Chlorophyll

• Photolysis

What are the two main stages of photosynthesis?

• Dark-dependent reactions and dark-independent reactions

• Light-dependent reactions and light-independent reactions

• Sun-dependent reactions and sun-independent reactions

• Light reactions and dark reactions

Which human body system is responsible for protecting the body from diseases and infections?

• Digestive system

• Immune system

• Endocrine system

• Respiratory system

What is the process by which plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll?

• Photocopying

• Photosynthesis

• Photo editing

• Photosynthesis

What is the main function of the circulatory system?

• Regulating body temperature

• Producing hormones

• Transporting essential substances throughout the body

• Digesting food

Which type of chemical reaction involves the breaking down of a compound into simpler substances?

• Synthesis reaction

• Decomposition reaction

• Combustion reaction

• Oxidation reaction

What is the unit of electric current?

• D

• A

• B

• C

Which human body system is responsible for producing hormones that regulate various bodily functions?

• Respiratory system

• Digestive system

• Circulatory system

• Endocrine system