4 previous year UPSC Prelims questions on Biology: Botany (Science and Technology). Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 1–4 of 4 questions
Blue-green algae, also known as cyanobacteria are often used as biofertilizers in rice cultivation. They have the ability to fix atmospheric nitrogen into a form that plants can use, enriching the soil with nitrogen and improving crop growth.
A phytotron is a facility that provides an environment where various environmental factors such as temperature, humidity, light, and CO₂ levels can be controlled precisely to study plant growth and development. This setup helps scientists to conduct experiments on plants in a controlled and reproducible environment. Phytotron is neither related with growing plants in disease free conditions nor conserving endangered species of plants.
Soft drinks, especially colas, often contain caffeine, which is a stimulant. Caffeine can help to increase alertness and reduce fatigue, and it is commonly added to colas and other energy drinks.
Canola oil is derived from a type of mustard plant that has been specially bred to have very low levels of erucic acid, which is a substance that can be harmful in large amounts. This makes canola oil safe and suitable for human consumption. Canola oil is known for being rich in unsaturated fatty acids, especially omega-3 and omega-6 fatty acids, making it a heart-healthy cooking oil. It has a long shelf life due to its stability, and its mild flavor makes it suitable for a variety of culinary uses.
| Q | UPSC year | Correct answer |
|---|---|---|
| 1 | 2000 | (a) Blue-green algae |
| 2 | 2000 | (c) grow plants under controlled conditions |
| 3 | 2000 | (a) Caffeine |
| 4 | 2000 | (d) oil has very low erucic acid content |
This page covers 4 previous year UPSC Prelims GS Paper-I questions on Biology: Botany (Science and Technology), asked from 1996 to 2025. Each has the correct answer and an explanation.
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Questions on Biology: Botany (Science and Technology) are available for 14 years, from 1996 to 2025. Use the Year filter to practise a single paper.
