Import Question JSON

Current Question (ID: 11892)

Question:

Which of the following is incorrect about Cyanobacteria?

Options:

1. They are photoautotrophs
2. They lack heterocysts
3. They often form blooms in polluted water bodies
4. They have chlorophyll similar to green plants

Solution:

Heterocysts are specialized cells found in some filamentous cyanobacteria that are involved in nitrogen fixation. These cells are modified for nitrogen fixation and have thick cell walls to protect the enzyme nitrogenase from oxygen, which inhibits its activity. Heterocysts play a crucial role in the nitrogen cycle by fixing atmospheric nitrogen into a form that can be used by the cyanobacteria and other organisms in the ecosystem. Therefore, the statement that cyanobacteria lack heterocysts is incorrect, as some filamentous cyanobacteria do have heterocysts as specialized cells for nitrogen fixation.

Import JSON File

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
}