Unit 1 - Respiration

Which of the following represents the process of cellular respiration?

• Glucose + water + oxygen --> carbon dioxide + energy

• Carbon dioxide + water + energy --> glucose + oxygen

• Glucose + oxygen --> carbon dioxide + water + energy

• Glucose + water + carbon dioxide --> oxygen + energy

Answer explanation

The correct choice, 'Glucose + oxygen --> carbon dioxide + water + energy', accurately describes cellular respiration, where glucose and oxygen are converted into carbon dioxide, water, and energy (ATP).

Where does cellular respiration take place?

• Mitochondria

• Cell Membrane

• Nucleus

• Ribosomes

Answer explanation

Cellular respiration primarily occurs in the mitochondria, which are known as the powerhouse of the cell. They convert nutrients into energy, making them essential for this process.

Which of the following is produced during the process of cellular respiration?

• Carbon dioxide

• Energy (ATP)

• Water

• All of the above

Answer explanation

During cellular respiration, glucose is broken down to produce energy (ATP), along with byproducts of carbon dioxide and water. Therefore, the correct answer is 'All of the above'.

Which process provides humans with the glucose needed for cellular respiration?

• digestion

• fermentation

• photosynthesis

• breathing

Answer explanation

Digestion breaks down food into glucose, which is then used in cellular respiration to produce energy. Other processes like fermentation and photosynthesis do not directly provide glucose to humans.

What main food group do we get most of our energy from?

• proteins

• carbs

• meats

• nucleic acids

Answer explanation

Carbohydrates (carbs) are the body's primary source of energy, providing fuel for daily activities and bodily functions. While proteins and fats also contribute to energy, carbs are the most efficient source.

The purpose of cellular respiration is to produce ?

• energy

• oxygen

• sugar

• protein

Answer explanation

The purpose of cellular respiration is to produce energy. This process converts glucose and oxygen into ATP, which cells use for various functions, making energy the correct answer.

What is the correct equation for cellular respiration?

• 6O₂ + C₆H₁₂O₆ -> 6CO₂ + 6H₂O + ATP

• 6O₂ + C₆H₁₂O₆ + ATP -> 6CO₂ + 6H₂O

• 6CO₂ + 6H₂O -> 6O₂ + C₆H₁₂O₆ + ATP

• 6CO₂ + 6H₂O + ATP -> 6O₂ + C₆H₁₂O₆

Answer explanation

The correct equation for cellular respiration is 6O2 + C6H12O6 -> 6CO2 + 6H2O + ATP. This shows that glucose and oxygen are converted into carbon dioxide, water, and energy (ATP), which is essential for cellular functions.

Please select who performs cellular respiration: 

• Animals 

• Both animals and plants 

• plants 

Answer explanation

Both animals and plants perform cellular respiration to convert glucose and oxygen into energy, carbon dioxide, and water. This process is essential for their survival, making the correct answer 'Both animals and plants'.

How does glucose and oxygen get to the mitochondria?

• The bloodstream.

• The stomata.

• The roots.

Answer explanation

Glucose and oxygen are transported to the mitochondria via the bloodstream. The bloodstream carries these essential nutrients from the digestive system and lungs to cells throughout the body, including those with mitochondria.

Chloroplasts are...

• A type of pigment used for photosynthesis

• The location inside a plant cell where photosynthesis happens

• The location where cellular respiration happens

• Green beans

Answer explanation

Chloroplasts are the organelles in plant cells where photosynthesis occurs, converting sunlight into energy. This makes the correct answer 'The location inside a plant cell where photosynthesis happens'.