Photosynthesis Flashcards
Name the plant organelle that fixes carbon dioxide from the atmosphere (1)
Chloroplast
Describe how starch is formed from the products of LIR of photosynthesis (4)
- 2 GALP used to produce glucose molecules
- joined by glycosidic bonds to form starch
- by condensation reactions
- producing amylose & amylopectin
Describe the LDR of photosynthesis. (5)
- light used to excite electrons in chlorophyll
- photolysis to produce: H, O & e-
- electrons used in ETC
- generation of ATP
- reduction of NADP
Explain why an increase in CO2 conc. affects the growth of plants in greenhouses. (3)
- CO2 is a limiting factor
- CO2 fixed to produce GALP
- therefore greater rate of growth
Where in the chloroplast do LDR take place. (1)
Thylakoids
What are the products of LDR. (3)
- reduced NADP
- ATP
- oxygen
State the location of chlorophyll in chloroplast. (1)
Thylakoid membrane
In what part of chloroplasts do LIRs take place. (1)
Stroma
What is the name of the enzyme used by plants to fix CO2. (1)
RUBISCO
What is the immediate product of LIR. (1)
GP
State the location of the Calvin Cycle. (1)
- stroma of chloroplast
Describe the role of the products of LIR in the Calvin Cycle. (3)
- products = red. NADP & ATP
- red NADP used to convert GP to GALP
- ATP used to convert GALP to RuBP
Explain the importance of RUBISCO to the productivity of an ecosystem. (2)
- fixes carbon
- allowing formation of organic molecules
Explain the relationship b/w the structure and functions of a granum in photosynthesis. (3)
- granum formed by many layers of thylakoid membranes to increase surface area
- thylakoid membranes have chlorophyll to absorb light
- electron carrier molecules in T.M involved in ATP production
