2 In tissue culture, what is the term for the mass of undifferentiated cells? A Callus B Explants C Seedling D Graft
4 Which model explains enzyme action by stating that the active site is flexible and adjusts to fit the substrate? A Lock and Key Model B Induced Fit Model C Fluid Mosaic Model D Saturation Model
5 Which artificial propagation method involves growing a new plant from a piece of stem, leaf, or root? A Cutting B Grafting C Layering D Tissue culture
6 Which of the following is a succulent underground stem that stores food? A Rhizome B Corm C Tuber D Stolon
9 Which measure of central tendency is most appropriate for finding the most common shoe size in a class? A Mean B Median C Mode D Average
11 Deficiency of which nutrient causes chlorosis? A Nitrogen B Phosphorus C Potassium D All of the above
12 Apoplastic movement of water occurs: A Through the cytoplasm of cells. B Along cell walls and intercellular spaces. C Through plasmodesmata. D Inside the xylem vessels only.
13 Which factor does NOT affect the rate of transpiration? A Temperature B Wind speed C Atmospheric humidity D Soil pH
14 Rhizomes are underground stems that grow horizontally. Which plant is an example of propagation by rhizomes? A Ginger B Dahlia C Onion D Potato
15 Which stage of aerobic respiration produces the most ATP? A Glycolysis B Krebs cycle C Electron transport chain D Fermentation
18 At low substrate concentration, the rate of an enzyme-catalyzed reaction is directly proportional to: A Enzyme concentration B Substrate concentration C Temperature D pH
19 Halophiles are plants adapted to: A Dry environments B Salty environments C Aquatic environments D Moderate environments
20 In non-competitive inhibition, the inhibitor binds to: A the active site B the substrate C an allosteric site D the product
21 Which gas is released during alcoholic fermentation? A Oxygen B Carbon dioxide C Nitrogen D Hydrogen
22 A bar chart shows the number of students who prefer different fruits. The bar for mango is tallest. This means: A Mango is the least preferred fruit B Mango is the most preferred fruit C Mango is the average fruit D Mango is the median fruit
23 Which model of enzyme action was proposed by Daniel Koshland? A Lock and key model B Induced fit model C Fluid mosaic model D Allosteric model
25 Which tissue is responsible for the transport of water and minerals in plants? A Phloem B Xylem C Cortex D Epidermis