SCIENCE 8 CELLULAR RESPIRATION

Multiple Choice

Why is cellular respiration essential for living organisms?

• It produces energy needed for cellular activities

• It helps in photosynthesis

• It stores genetic information

• It provides structural support

Multiple Choice

What is the main purpose of photosynthesis in green plants?

• To harness light energy from the Sun and convert it to chemical energy of sugar

• To absorb oxygen from the air

• To release carbon dioxide

• To produce water for the plant

Fill in the Blank

Can you give your paycheck directly to the ice cream vendor as payment for your ice cream?

Multiple Choice

Where do organisms obtain the energy that they need to perform essential life processes?

• From sunlight

• From water

• From the air

• From food

Fill in the Blank

The energy source of all living things is a complex molecule called ___ .

Multiple Select

Which of the following are components of adenosine triphosphate (ATP)?

• A nitrogen base (adenine)

• A 5-carbon sugar (ribose)

• Three phosphate groups

• A fatty acid chain

Open Ended

Where can the cell obtain the energy needed to form the high-energy phosphate bond of ATP?

Multiple Choice

Which organic molecule is the major source of energy in living cells for ATP production?

• Glucose

• Glycerol

• Fatty acid

• Amino acid

Open Ended

In what ways do you think the process of cellular respiration impacts the daily functioning of your body?

Multiple Choice

What is the process called by which energy from food is converted into chemical energy of ATP in cells?

• Photosynthesis

• Cellular respiration

• Fermentation

• Glycolysis

Fill in the Blank

Cellular respiration may be classified into two types depending on the need for oxygen, namely: aerobic respiration and ___ respiration.

Multiple Select

Which of the following statements about aerobic and anaerobic respiration are correct?

• Aerobic respiration requires oxygen.

• Anaerobic respiration occurs in the absence of oxygen.

• Both types of respiration produce ATP.

• Aerobic respiration does not produce ATP.

Open Ended

Explain the process of glycolysis and its significance in cellular respiration.

Open Ended

Describe the difference between oxidation and reduction as explained in the context of the Krebs Cycle.

Multiple Choice

Which molecules are generated as a result of the oxidation of pyruvate in the Krebs Cycle?

• ATP, NADH, FADH2

• CO2, H2O, NAD+

• Glucose, Oxygen, Water

• ADP, FAD, NAD+

Open Ended

Explain the role of acetyl-CoA in the Krebs Cycle and how it is formed from pyruvate.

Fill in the Blank

Fill in the blank: The four-carbon molecule that combines with acetyl-CoA to start the Krebs Cycle is called ___.

Multiple Select

Which of the following are products of the Krebs Cycle?

• NADH

• FADH2

• ATP

• Glucose

Multiple Choice

Which statement best describes the function of NADH and FADH2 in cellular respiration?

• They store energy for long-term use.

• They act as electron carriers to generate ATP.

• They break down glucose directly.

• They transport oxygen in the cell.

Multiple Choice

Which molecules are produced during the Krebs cycle and are used in the electron transport chain to generate more ATP?

• NADH and FADH2

• Glucose and Oxygen

• Pyruvate and Water

• ADP and Phosphate

Fill in the Blank

Electron transport is defined as a series of ___ reactions that is similar to a relay race.

Multiple Select

Which of the following statements about the electron transport chain are correct?

• It takes place in the inner mitochondrial membrane.

• It is the only phase in glucose metabolism that uses atmospheric oxygen.

• It produces water by reducing molecular oxygen.

• It occurs in the cytoplasm.

Open Ended

Explain the role of the electron transport chain in cellular respiration and how it relates to the previous steps such as glycolysis and the Krebs cycle.

Open Ended

After learning about cellular respiration, what questions do you still have or what would you like to know more about this topic?

Open Ended

What are the major pathways of cellular respiration and why are they important for living organisms?

Open Ended

What are the major pathways of cellular respiration and why are they important for living organisms?