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Questions and Answers

What does the term 'homeostasis' refer to?

The process of photosynthesis in plants.
The genetic variation within a population.
The mechanism of natural selection.
The maintenance of stable internal conditions in an organism. (correct)

Which of the following best describes cellular respiration?

The process by which plants synthesize food.
The mechanism for photosynthesis in aquatic organisms.
The method cells use to divide and reproduce.
The metabolic process that converts glucose into energy. (correct)

What is the primary function of chlorophyll in plants?

To capture light energy for photosynthesis. (correct)
To transport nutrients within a plant.
To protect plants from herbivores.
To absorb water from the soil.

Which macromolecule serves as the main source of energy for living organisms?

Carbohydrates. (B) Signup and view all the answers

What role do enzymes play in biological reactions?

They act as catalysts to speed up reactions. (D) Signup and view all the answers

How does feedback inhibition regulate metabolic pathways in cells?

Feedback inhibition limits the production of a substance by inhibiting an enzyme involved in its synthesis when the product reaches a certain concentration. Signup and view all the answers

What role do mitochondria play in energy production?

Mitochondria are the powerhouse of the cell, where aerobic respiration occurs and ATP is produced through the Krebs cycle and electron transport chain. Signup and view all the answers

Explain the significance of the electron transport chain in cellular respiration.

The electron transport chain is crucial as it generates ATP through oxidative phosphorylation while transferring electrons and pumping protons across the membrane. Signup and view all the answers

Discuss how environmental factors can influence enzyme activity.

Enzyme activity can be affected by temperature, pH, and substrate concentration, which can alter the enzyme's shape and function. Signup and view all the answers

Describe the relationship between photosynthesis and cellular respiration.

Photosynthesis converts light energy into chemical energy stored in glucose, while cellular respiration breaks down glucose to release stored energy for cellular processes. Signup and view all the answers

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