1. Explain the following concepts in relation to plant movements under the following
headings; definition, purpose and stimulus.
a) Gravitropism
b) Phototropism
c) Thirgmorphogenesis
d) Nyctinasty (20 marks)
2. Explain the role of the following compounds in a plant
a) Cutin
b) Suberin
c) Pyrethroids
d) Anthocyanins (8 marks)
3.
i) Give a definition of a plant hormone (2 marks)
ii) Describe the effects of the following major plant hormones (Auxins, Gibberelins,
Cytokinins, Abscisic acid and Ethylene) on the plant.
Illustrate/Label Mitosis and Meiosis. Compare and Contrast both explaining Cell Division. Which is Asexual Reporduction and Sexual Reproduction? Why?
Is Protein a Polymer?, does it contain a amino
group?, is it formed by hydrolysis?, is it an energy storage molecule?, is it
made up of a triglyceride?, is it one of the monomers that combines to form
starch? does it contain glycosidic bonds?
Make use of a neat, annotated schematic representation to discuss the structure and function of demosomes. (9 marks )
How do diffusion, facilated transport, osmosis and active transport differ? (8 marks)
Make a list of the membranous organelles of a eukaryotic cell and describe the function of each (8 marks )
What happens to plant and animal cells placed in solutions of different concentrations
Human cheek cells were placed in a solution more concentrated than their cytoplasm. State the effect this would have on the appearance of the cells
A person dunks their hand in ice cold water for 5 minutes. Explain why this would mean the person would find it difficult to clench a fist for a few minutes after removing their hand from the water.
you are told that cells on a microscope slide are plant,animal, or bacerial. you look through a microscope and see cell walls and menbrane bound organelle. you conclude that the cells