Question

8. Fill in the blanks to describe how the molecules of G3P are divided up between regeneration of the Calvin Cycle and production of glucose. Every blank contains a number.

(a) RuBP is a ______ -carbon molecule.

(b) For every 3 turns of the Calvin Cycle, _____ molecules of CO2 are fixed to ________ molecules of RuBP.

(c) For three turns of the Calvin Cycle, after the reduction step, _______ molecule of G3P are produced. Each G3P has ____ carbons.

(d) Of the G3P produced, _____ is/are used to regenerate _____ molecules of RuBP and _____ is / are used to make glucose.

(e) Glucose has _____ carbons, so it takes _____ molecules of CO2 and ____ turns of the Calvin Cycle to make 1 molecule of glucose.

Answer 1

a) RuBP is a   5- carbon molecule.

b) For every 3 turns of the Calvin Cycle, 3 molecules of CO2 are fixed to 3 molecules of RuBP.

c) For three turns of calvin cycle,after the reduction step, 6   molecule of G3P are produced. Each has 3 carbons.

d) Of the G3P produced, 5   are used to regenerate 3 molecules of RuBP and 1 is used to make glucose.

e) Glucose has 6 carbons, so it takes 6 molecules CO2 and 6 turns of the calvin cycle to make 1 molecule of glucose.