Plant Physiology and Photosynthesis

Answer the following questions and then submit your answers for marking.

1. In vascular plants, transport of sugar solutions is through tubes constructed of cells called:
    Vessel elements
    Companion Cells
    Tracheids
    Sieve-Tube Elements
2. All the following are true of companion cells except:
    Companion cells fuse together to form the sieve plates of sieve-tube elements.
    Companion cells provide direct nourishment for sieve-tube elements.
    Companion cells regulate the movement of sugar into and out of sieve-tubes.
    Sieve-tube plasma membrane may be repaired by companion cells.
3. What type of tissue transports the products of photosynthesis to cells that are metabolically active?
    Xylem
    Mesophyll
    Phloem
    Parenchyma
4. All the following are true of xylem except:
    Tracheids and vessel elements are the two types of cells that form xylem.
    Water and minerals are transported through xylem.
    Companion cells provide nutrition for tracheids.
    Tracheids are characterized by pits.
5. In general, which of the following accounts for the movement of most minerals from soil into root hairs?
    Diffusion
    Osmosis
    Active Transport
    Hypotonicity
6. Generally, what do plants require to meet the demands of their metabolic activities?
    Carbohydrates, light, water and nitrogen
    Light, oxygen, carbon dioxide, water, and minerals
    Carbon dioxide, oxygen, proteins and minerals
    Water, carbohydrates, proteins, and minerals
7. Which of the following elements is essential for the synthesis of chlorophyll?
    Calcium
    Magnesium
    Potassium
    Manganese
8. The movement of water and minerals through xylem is explained by the:
    Pressure-flow theory
    Translocation theory
    Bulk-flow theory
    Cohesion-tension theory
9. Water loss through the stomata of leaves is termed:
    Transpiration
    Translocation
    Osmosis
    Evaporation
10. A plant, by opening and closing its stomata, must achieve a balance between:
    Oxygen loss and water uptake
    Carbon dioxide loss and sugar uptake
    Water loss and carbon dioxide uptake
    Sugar loss and oxygen uptake
11. An essential plant nutrient required for the regulation of stomatal opening and closing is:
    Phosphate
    Calcium
    Magnesium
    Potassium
12. Where do the light independent reactions of photosynthesis occur?
    Thylakoids
    Cytoplasm
    Stroma
    Matrix
13. During the process of photosynthesis, light energy is captured
 directly by:
    Protons from NADPH
    Electrons from chlorophyll
    Phosphate from ATP
    Carbons from carbon dioxide molecules
14. The vast majority of chloroplasts found in a leaf are located where?
    Spongy Mesophyll
    Palisade Mesophyll
    Epidermis
    Guard Cells
15. A leaf appears red in the autumn because it:
    Absorbs green light
    Reflects or transmits green light
    Absorbs blue and yellow light
    Reflects or transmits red light

Your Quiz Score isout of 15.
Your Score: %

Back
Reproduction without permission is strictly prohibited.
© Copyright 1998 Terry Brown. All rights reserved.