Import Question JSON

Current Question (ID: 11899)

Question:

$\text{Cells in some filamentous cyanobacteria that are specialized for nitrogen fixation are called:}$

Options:

1. $\text{Phycobilisomes}$
2. $\text{Chromatophores}$
3. $\text{Grana}$
4. $\text{Heterocysts}$ (Correct)

Solution:

$\text{Explanation:}$ $\text{Heterocysts are specialized cells found in some filamentous cyanobacteria (also known as blue-green algae) that are specialized for nitrogen fixation - the process by which atmospheric nitrogen is converted into a form that can be used by the cyanobacteria for growth and metabolism.}$ $\text{Key characteristics of heterocysts:}$ $\text{- Have thick cell walls and lack photosynthetic pigments}$ $\text{- Create an anaerobic environment necessary for nitrogen-fixing enzymes to function properly}$ $\text{- Play a crucial role in the nitrogen cycle}$ $\text{- Essential for growth and survival of cyanobacteria in nitrogen-limited environments}$ $\text{Other options are incorrect:}$ $\text{- Phycobilisomes: Light-harvesting complexes in cyanobacteria}$ $\text{- Chromatophores: Membrane structures containing photosynthetic pigments}$ $\text{- Grana: Stacked thylakoids in chloroplasts of higher plants}$

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
}