Plant Physiology

Daffodil International University Department of Genetic Engineering and Biotechnology Faculty of Health and Life Sciences B. Sc. (Hons.) in Genetic Engineering and Biotechnology Midterm Examination Fall 2026 Course Code: 0512-2203 Course Title: Plant Physiology Level and Term: L2, T2 Section: 252 (A+B) Course Teacher Initials: AR Time: 1 Hour 30 Minutes Total Marks: 25 Answer the Following Questions: Marks 1 (a) Define diffusion and list the factors affecting the rate of diffusion. [CLO3, PLO1, C1] 2.5 (b) Differentiate between diffusion and osmosis [CLO3, PLO1, C4] 2.5 2 (a) Explain water absorption in plants and describe the significance of water transport in plant growth and physiological activities. [CLO3, PLO2, C2] 2.5 (b) Distinguish between active and passive transport. [CLO3, PLO1, C4] 2.5 3 (a) Define guttation. Illustrate the structure of a hydathode with a properly labeled diagram and relate its structural components to the process of guttation. [CLO3, PLO1, C3] 2.5 (b) What is transpiration? Classify transpiration based on its site of occurrence and describe each type with a suitable example. [CLO3, PLO2, C2] 2.5 4 (a) What is essential element of plants? Mention the criteria of essentiality. Classify essential elements with examples. [CLO3, PLO1, C1] 2.5 (b) Evaluate Lundegårdh's theory of active mineral absorption in terms of its proposed mechanism and explanatory significance. [CLO3, PLO2, C5] 2.5 5 (a) Identify the products of the light-dependent reactions of photosynthesis and illustrate the sequence of reactions in the Calvin cycle using a flow diagram. [CLO1, PLO2, C3] 3.0 (b) Construct a flow diagram showing how C4 plants assimilate CO2 to produce carbohydrate. [CLO1, PLO2, C6] 2.0