GS Biology Questions and Answers
GS Biology questions with answers enhance your general science knowledge, especially for exams like SSC, Railways, and UPSC. Biology is an important branch of general science that deals with the study of life, organisms, and their vital processes. These general science questions and answers cover topics such as cells, human anatomy, genetics, and ecology — frequently asked in competitive exams. Practicing these questions helps you understand biological concepts clearly and boosts your score in the general awareness section. Strengthen your science fundamentals and prepare effectively for multiple-choice questions in upcoming tests.
GS Biology
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195 questions
141. Photo-oxidation is
- photorespiration
- photolysis
- light and oxygen induced breakdown
- All of the above
142. Plants absorb most part of water needed by them through their
- embryonic zone
- growing point
- root hairs
- zone of elongation
143. Placenta is the structure formed
- by the union of foetal and uterine tissue
- by foetus only
- by fusion of germ layers
- None of these
145. Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
- flavoxanthin
- melanin
- carotene
- xanthopny II
146. Normal adult human male has
- 10 gram of haemoglobin/100 gram of blood
- 14 gram of haemoglobin/100 gram of blood
- 18 gram of haemoglobin/100 gram of blood
- 24 gram of haemoglobin/100 gram of blood
147. Radical vascular bundles are those in which
- xylem is surrounded by phloem
- phloem is surrounded by xylem
- xylem and phloem occur on the same radius
- xylem and phloem occur on the different radii
149. Night blindness is cause by lack of which vitamin?
- Vitamin A
- Vitamin B
- Vitamin C
- Vitamin D
150. Radioactivity is a phenomenon of the spontaneous emission of
- protons (alpha particles)
- electrons (beta particles)
- gamma rays (short wave electromagnetic waves)
- All of the above