8th Grade Science: Understanding Cells and Energy

What is the main focus of molecular biology standard discussed in the video?

• Human anatomy

• Molecular biology

• Physics principles

• Food energy and general health

What are organelles within a eukaryotic cell compared to?

• Body organs

• Solar systems

• City buildings

• Computer hardware

Which organelle is responsible for energy production within a cell?

• Chloroplast

• Lysosome

• Mitochondria

• Nucleus

What are the reactants needed for photosynthesis?

• Glucose, water, and sunlight

• Carbon dioxide, oxygen, and water

• Carbon dioxide, water, and sunlight

• Oxygen, glucose, and sunlight

What is the main product of photosynthesis that humans and other heterotrophs consume?

• Glucose

• Carbon dioxide

• Water

• Oxygen

What are the products of cellular respiration?

• Glucose and oxygen

• Carbon dioxide, water, and ATP

• Oxygen and water

• Sunlight and glucose

How does cellular respiration differ when oxygen is not available?

• It stops completely

• It produces more ATP

• It proceeds through fermentation

• It only produces glucose

What happens to the reactants of photosynthesis in cellular respiration?

• They are discarded

• Transformed into ATP

• Converted into sunlight

• Used as reactants

What type of energy is transferred when organisms interact for food?

• Mechanical energy

• Chemical energy

• Thermal energy

• Electrical energy

True or False: The sun is the primary source of almost all food energy.

• Depends on the ecosystem

• Sometimes true

• False

• True