Question : Breakdown of pyruvate into lactic acid and energy in lack of oxygen takes place in which of the following?
Option 1: Bacteria
Option 2: Human muscle cells
Option 3: Yeast
Option 4: Mitochondria
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Correct Answer: Human muscle cells
Solution : The correct option is Human muscle cells.
The breakdown of pyruvate into lactic acid and energy in the absence of oxygen takes place in human muscle cells. This process is called anaerobic respiration. When there is not enough oxygen available, muscle cells convert pyruvate into lactate to produce a small amount of ATP, the energy currency of cells. This process allows muscle cells to continue to function for a short period, even when oxygen is limited.
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Question : Photosynthesis takes place in which part of the plant cell?
Option 1: Ribosomes
Option 2: Chloroplast
Option 3: Nucleus
Question : The first step in the process of nutrition is the breakdown of glucose into a three-carbon molecule called ______.
Option 1: pyruvate
Option 2: propanol
Option 3: propane
Option 4: methanol
Question : Which part of a cell converts nutrients into energy?
Option 1: Cell membrane
Option 2: Lysosomes
Option 3: Mitochondria
Option 4: Chromosome
Question : The first organic compounds synthesised in the laboratory was
Option 1: Urea
Option 2: Uric acid
Option 3: Lactic acid
Option 4: Glucose
Question : The number of mitochondria in bacterial cells is
Option 1: One
Option 2: Two
Option 3: Many
Option 4: Zero
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