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Metabolism and Energy Stages of Catabolism

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Metabolism and Energy Stages of Catabolism

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Questions and Answers

What is the main purpose of catabolic reactions in metabolism?

To break down large, complex molecules to provide energy and smaller molecules (correct)

To build larger molecules using ATP energy

To synthesize DNA and protein

To separate the contents of a cell from the external environment

Which stage of catabolism involves the oxidation of small molecules to produce ATP energy?

Stage 4: Polymerization

Stage 1: Digestion and Hydrolysis

Stage 2: Degradation

Stage 3: Oxidation (correct)

Where do metabolic reactions occur in eukaryotic cells?

Ribosome

Lysosome

Nucleus

Mitochondrion (correct)

What is the function of lysosomes in a cell?

Contain hydrolytic enzymes for digesting old cell structures (D) Signup and view all the answers

Which component of a cell separates the cell's contents from the external environment?

Cell membrane (D) Signup and view all the answers

What is the main function of the nucleus in a cell?

DNA replication and protein synthesis (C) Signup and view all the answers

What is the main function of ATP in biological systems?

Facilitating energy transfer within cells (C) Signup and view all the answers

Which component is NOT part of the ATP molecule?

Pyruvate (B) Signup and view all the answers

What happens to pyruvate under anaerobic conditions?

It is reduced to lactate (D) Signup and view all the answers

Which process occurs when excess glucose needs to be stored in the body?

Glycogen synthesis (A) Signup and view all the answers

What is the primary function of Coenzyme A (CoA) in metabolic pathways?

Carrying acyl groups for further metabolism (A) Signup and view all the answers

When does gluconeogenesis tend to be more active?

During a low-carbohydrate diet (D) Signup and view all the answers