LECTURE 1-B (Photosynthesis)

Question 1

PHYSIOLOGY

Answer 1

1) study of parts and functions in organisms
2) basic physiological processes are: (1) photosynthesis, (2) respiration, (3) transpiration, (4) translocation, (5) mineral uptake, (6) response to environmental stimuli or conditions, (7) other metabolic activities
3) interaction between genetic potential and environment resulting in growth, development and yield

Question 2

MAJOR PHYSIOLOGICAL PROCESSES IN PLANTS

Answer 2

1) photosynthesis
2) respiration
3) transpirration
4) translocation of nutrients
5) nutrient intake

Question 3

PLANTS

Answer 3

1) autotrophs
2) photosynthesis occurs is: leaves -> mesophyll cells -> chloroplast -> chlorophyll

Question 4

AUTOTROPHS
(PLANTS)

Answer 4

ability to produce their own food (glucose) through photosynthesis

Question 5

CHEMISTRY OF PHOTOSYNTHESIS

Answer 5

1) anabolic process (synthesis of complex end-product from simple substrates)
2) endergonic (stores CHEMICAL energy; energy requiring to proceed)
3) carbon dioxide requiring a process that uses light energy and water to produce organic macromolecules (glucose)
4) 6CO2 + 6H2O –> C6H12O6 + 6O2

Question 6

CHLOROPLAST

Answer 6

1) has two membranes (“bi-layer”)
2) thylakoids are sub-organelles where photosynthesis takes place
3) granum (stacked thylakoids - grana/plural)
4) stroma (space surrounding grana)

Question 7

CHLOROPHYLL

Answer 7

1) found in the green internal organs of the chloroplast and are embedded in the thylakoid membrane
2) acts like a light ‘antenna’ and absorb energy from sunlight

Question 8

REQUIREMENTS FOR PHOTOSYNTHESIS

Answer 8

1) sunlight/light energy
2) carbon dioxide
3) water

Question 9

MOST EFFICIENT LIGHT WAVELENGTH FOR PHOTOSYNTHESIS

Answer 9

1) blue range (425-450 nm) and red range (600-700 nm)

Question 10

HARVESTING OF LIGHT ENERGY IN PLANTS

Answer 10

light energy –> hits chlorophyll –> light transferred from one chlorophyll to another –> result to electron transfer to a primary electron acceptor

Question 11

PHOTOSYSTEM

Answer 11

1) cluster of thylakoid membranes (w/ chlorophyll pigments) that harvest light energy