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Current Question (ID: 12807)

Question:

SER and RER can be distinguished with its presence in

Options:

1. protein synthesising cells
2. protein and fat synthesising cells
3. carbohydrates and fat synthesising cells
4. lipid and protein synthesising cells

Solution:

Endoplasmic reticulum was discovered by Porter et al (1945). It is a network of membranous sac like structure such as cisternae, vesicles and narrow tubules. On the basis of presence or absence of ribosomes on its surface these structure are of two types. Rough Endoplasmic Reticulum (RER) with ribosomes on its surface is prominently present in protein synthesizing cells. It is also called as ergastoplasm. Smooth Endoplasmic Reticulums (SER) lack ribosomes on its surface. It is also known as sarcoplasm. These structure predominantly occur in lipid synthesising cells.

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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
}