The video explains how energy from food originates from plants through photosynthesis, which is divided into two steps: storing energy as ATP and the Calvin cycle that captures carbon to form sugar. The Calvin cycle is a sustainable production line that efficiently uses resources to produce glucose and regenerate RUBP. The process involves multiple molecular transformations, highlighting the efficiency of cycles in nature.

What is the primary source of energy in the food we consume?

• Proteins

• Sugars

• Vitamins

• Fats

Which process is responsible for converting CO2 into glucose in plants?

• Glycolysis

• Photosynthesis

• Fermentation

• Respiration

What is the role of ATP in photosynthesis?

• It stores energy from the sun

• It breaks down glucose

• It captures carbon

• It releases oxygen

What enzyme initiates the Calvin cycle by combining CO2 with RUBP?

• Lipase

• Amylase

• Pepsin

• Rubisco

How many carbons are in a single glucose molecule?

• Six

• Five

• Four

• Three

How many G3P molecules are needed to form one glucose molecule?

• Three

• Four

• Two

• One

What is the total number of carbons involved in the Calvin cycle to produce glucose and regenerate RUBP?

• 24

• 30

• 36

• 42

Why are cycles important in nature's biochemical processes?

• They are more efficient

• They are faster

• They are more colorful

• They are simpler

What is the main advantage of cycles over linear processes in nature?

• They create feedback loops

• They are less efficient

• They require more resources

• They use more energy

What is the role of sunlight in the formation of sugar in plants?

• It absorbs carbon

• It breaks down sugar

• It cools the plant

• It provides raw energy