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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357 questions
271. Bulliform cells are present
- In upper epidermis of dicot leaves
- In lower epidermis of monocot leaves
- In upper epidermis of monocot leaves
- In dicot stem
272. The youngest layer of secondary phloem in woody dicot stem is located
- Just outside the vascular cambium
- Just on the inner side of cambium
- Between periderm and primary cortex
- Just outside pith
273. The wall of cork cells is mostly impregnated with
- Cutin
- Suberin
- Lignin
- Hemicellulose
274. Cork cells are
- Photosynthetic
- Elongated and participate in movement
- Meristematic
- Dead
275. Dendrochronology is the study of
- Height of a tree
- Age of a tree by counting annual rings
- Diameter of a tree
- Number of leaves in a tree
276. The best method to determine the age of a tree is
- To measure its diameter
- To count the number of leaves
- To count the number of annual rings at the base
- To measure its height
277. If a sign was nailed 5 feet above ground in 1997, and tree grows 4 inches annually, how high will the sign be in 2007?
- 5 feet
- 8 feet
- 4 feet 8 inches
- 9 feet 4 inches
278. Safranin stains which element of tissues?
- Starch elements
- Lignified elements
- Bast
- Protein elements
279. Which tissue forms the thin surface for gas exchange in lungs?
- Epithelial
- Connective
- Nervous
- Muscle
280. Endothelium of the inner surface of blood vessels is
- Simple squamous epithelium
- Columnar epithelium
- Cuboidal epithelium
- Ciliated cells