homework questions

Question 1

In the following passage the numbered spaces can be filled with biological terms
During photosynthesis plants produce (1) compounds which contain carbon, such as carbohydrates, lipids and proteins. Most of the sugars synthesised by plants are used by the plant in (2). The rest are used to make other groups of biological molecules. These biological molecules form the biomass of the plants. Biomass can be measured in terms of mass of (3) per given time. The chemical energy stored in dry biomass can be estimated using (4)

Answer 1

(1) organic
(2) respiration
(3) carbon
(4) calorimetry

Question 2

describe the light independent reaction of photosynthesis

Answer 2

M1 : CO2 is fixed to RUBP catalysed by the enzyme rubisco
M2 : this produces 1 highly unstable 6C molecule which immediately breaks down to 2 molecules of GP
M3: GP is reduced to triose phosphate
M4 : this is done by transfer of hydrogen from reduced NADP
M5: using energy transferred from hydrolysis of ATP
M6 : 1/6 of TP is converted to useful organic substances

Question 3

a student investigated the effect of different wavelengths of light on the rate of photosynthesis. What measurements should the student have taken to determine the rate of photosynthesis

Answer 3

amount of oxygen released