Here is the completed worksheet with answers filled in using the word bank, along with explanations for each:
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1. When you eat food that contains carbohydrates, you break down the carbohydrates into a monosaccharide called _Glucose_
✔ Explanation: Complex carbohydrates (like starches) are digested and broken down into simple sugars. The primary monosaccharide absorbed by the body from dietary carbs is
glucose, which is used for energy.
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2. If you don't use this monosaccharide, your body can store it in the liver in the form of _Glycogen_
✔ Explanation: Excess glucose is converted into
glycogen — a branched polysaccharide — and stored in the liver (and muscles) for later use. This process is called glycogenesis.
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3. When your body metabolizes (breaks down) glucose, whether incompletely or completely, the first pathway glucose molecules have to go through _Glycolysis_
✔ Explanation:
Glycolysis is the universal first step in glucose metabolism. It occurs in the cytoplasm and breaks one molecule of glucose into two molecules of pyruvate. Whether oxygen is present (aerobic) or not (anaerobic), glycolysis always happens first.
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4. Where does the pathway take place? _Cytoplasm_
✔ Explanation: Glycolysis occurs in the
cytoplasm of the cell, outside the mitochondria. This is shown clearly in the diagram where “Glycolysis” is labeled in the cytosol area of the cell.
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5. How many molecules of pyruvic acid are made from a single molecule of glucose? _2_
✔ Explanation: During glycolysis, one 6-carbon glucose molecule is split into two 3-carbon molecules called
pyruvate (or pyruvic acid). So the answer is
2.
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6. Where can this product go next? (Broken down completely/incompletely; hint: there are 2) _Mitochondria_ and _Fermentation_
✔ Explanation: After glycolysis produces pyruvate, there are two main pathways depending on oxygen availability:
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With oxygen (complete breakdown): Pyruvate enters the
mitochondria to undergo aerobic respiration (Krebs cycle + electron transport chain).
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Without oxygen (incomplete breakdown): Pyruvate undergoes
fermentation (e.g., lactic acid fermentation in muscles or alcoholic fermentation in yeast) to regenerate NAD⁺ so glycolysis can continue.
So the two possible destinations are:
Mitochondria and
Fermentation.
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✔ Final Answers Summary:
1. Glucose
2. Glycogen
3. Glycolysis
4. Cytoplasm
5. 2
6. Mitochondria and Fermentation
These answers match the provided word bank and align with standard biology curriculum on cellular respiration.
Parent Tip: Review the logic above to help your child master the concept of glycolysis worksheet.
