UPSC CSE · Science and Technology
UPSC Prelims Biology Questions (Science and Technology): PYQs with Answers
25 UPSC Prelims questions on Biology (Science and Technology) from 2011–2025, newest first. 2014 had the most (4). Difficulty: 24% easy, 48% medium and 28% hard.
- Viruses in Oceans and BacteriaConsider the following statements:
- Cassava Ginger Spinach Mint PapayaConsider the following pairs:
- Nitric OxideWhich one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?
- Extremophile MicroorganismsConsider the following statements:
- Biofilters Aquaculture SystemsWith reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:
- Biofilm Formation SitesConsider the following statements:
- B Cells and T CellsWhich one of the following statements best describes the role of B cells and T cells in the human body?
- Culturing Microbes Artificial MediumConsider the following:
- Plant vs Animal CellsWhich of the following statements are correct regarding the general difference between plant and animal cells?
- Recent Science DevelopmentsWith reference to the recent developments in science, which one of the following statements is not correct?
- Viruses Host RangeWhich of the following statements is/are correct? Viruses can infect
- Lichens Ecological SuccessionLichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of
- Photosynthesis Energy ConversionWhich one of the following is the process involved in photosynthesis?
- Biometric IdentificationIn addition to fingerprint scanning, which of the following can be used in the biometric identification of a person?
- Vegetative PropagationWhich of the following statements is/are correct regarding vegetative propagation of plants?
- Cold Storage Fruits RespirationFruits stored in a cold chamber exhibit longer storage life because:
- Transplanting Seedlings Root HairsMany transplanted seedlings do not grow because:
- Viruses CharacteristicsWhich of the following statements is/are correct?
- Minerals Muscle ContractionConsider the following minerals:
- Stem CellsWith reference to ‘stem cells’, frequently in the news, which of the following statements is/are correct?
- Origin of Life ElementsWhich one of the following sets of elements was primarily responsible for the origin of life on the Earth?
- Carbon Cycle SourcesConsider the following:
- Antioxidants Free RadicalsRegular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health…
- ABO Blood Group InheritanceA married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of…
- Girdling Tree BarkWhen the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because