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Current Question (ID: 12458)

Question:

Select the incorrect statement with respect to bast fibres a. Generally absent in primary phloem b. Elongated, branched with blunt ends c. Parenchymatous in nature d. Becomes dead at maturity

Options:

1. a & d
2. b & d
3. b & c
4. a & b

Solution:

The statement "Parenchymatous in nature" is incorrect with respect to bast fibers. Bast fibers are long, narrow cells that are derived from the phloem tissue of plants. They are typically elongated, unbranched, and have tapered ends, rather than blunt ends. They are also typically dead at maturity, which allows them to function as strong, durable structural elements in the plant. Bast fibers are not parenchymatous, as parenchyma cells are relatively unspecialized, thin-walled cells that are involved in a variety of functions such as storage, photosynthesis, and support.

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Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}