Import Question JSON

Current Question (ID: 12961)

Question:

Which one of the following generates new genetic combinations leading to variation?

Options:

1. Vegetative reproduction
2. Parthenogenesis
3. Sexual reproduction
4. Nucellar polyembryony

Solution:

During sexual reproduction, genetic recombinations occur as a result of crossing over between two non-homologous chromosomes during pachytene stage of meiotic cell division. Genetic recombinations lead to variations. Apart from this, random union of gametes also contributes to forming new combinations of characters resulting variation. Vegetative propagation is a form of asexual reproduction of a plant. Only one plant is involved and the offspring is the result of one parent. The new plant is genetically identical to the parent. Parthenogenesis is a type of asexual reproduction in which a female gamete or egg cell develops into an individual without fertilization. The nucellar cells surrounding the embryo sac and develop into the embryos in such species each ovule contain many embryos is known as Nucellar polyembryony.

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
}