MCQOPTIONS
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MCQOPTIONS
This section includes 61 Mcqs, each offering curated multiple-choice questions to sharpen your 12th knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following hormones contains Iodine? |
| A. | Thyroxine |
| B. | Testosterone |
| C. | Insulin |
| D. | Adrenaline |
| Answer» B. Testosterone | |
| 52. |
Angiosperms (Flowering plants) originated in |
| A. | Devonian period |
| B. | Jurassic period |
| C. | Cretaceous period |
| D. | Triassic |
| Answer» D. Triassic | |
| 53. |
Which of the following gases provided the carbon skeleton of living things during the origin of life? |
| A. | Water vapour |
| B. | Methane |
| C. | Nitrogen |
| D. | Ammonia |
| Answer» C. Nitrogen | |
| 54. |
Protenoid microspheres could produce an isolating membrane if---- is added to the aqueous solution: |
| A. | Lipids |
| B. | Nucleic acid |
| C. | Proteins |
| D. | Polysaccharides |
| Answer» B. Nucleic acid | |
| 55. |
In primitive earth, energy was formed from |
| A. | Lightning |
| B. | Volcanic eruption |
| C. | UV light |
| D. | All of these |
| Answer» E. | |
| 56. |
Life originated about 3.6 billion years ago in the |
| A. | Precambrian era |
| B. | Cambrian era |
| C. | Silurian era |
| D. | Mesozoic era |
| Answer» B. Cambrian era | |
| 57. |
Solar system originated from Solar Nebula--- billion years ago |
| A. | 1.6 |
| B. | 3.6 |
| C. | 4.6 |
| D. | 5.7 |
| Answer» D. 5.7 | |
| 58. |
Eukaryotes with a nucleus evolved ---million years ago |
| A. | 2200 |
| B. | 3800 |
| C. | 4500 |
| D. | 1600 |
| Answer» E. | |
| 59. |
The first anaerobic photoautotrophs originated--- million years ago |
| A. | 1000-2000 |
| B. | 3300-3500 |
| C. | 3600-4200 |
| D. | 4000-4200 |
| Answer» D. 4000-4200 | |
| 60. |
The approximate time when life originated dates back to |
| A. | 200-300 million years |
| B. | 3000-4000 million years |
| C. | 4000-5000 million years |
| D. | 500-1000 million years |
| Answer» C. 4000-5000 million years | |
| 61. |
The first cells like structures evolved in |
| A. | Ocean |
| B. | Air |
| C. | Land |
| D. | Desert |
| Answer» B. Air | |