Give the ratios between the following compounds in photosynthesis of plants:
A. Tetroses and sedoheptuloses
B. CO2 fixed and net production of G-3-P
C. DHAP takes part in regenerative phase and RUBP formed
Step 1: The ratio of tetroses to sedoheptuloses in photosynthesis is approximately 5:1. This is because during the Calvin cycle, carbon atoms are sequentially transferred between different sugar intermediates, and the ratio of tetroses to sedoheptuloses is crucial for the regeneration of RUBP.
Step 2: The ratio of CO2 fixed to the net production of G-3-P (Glyceraldehyde-3-phosphate) is generally 3:1. This is because for every 3 molecules of CO2 fixed, one molecule of G-3-P is produced in the Calvin cycle. This ensures a balance between carbon fixation and the production of energy-rich molecules for plant growth.
Step 3: DHAP (Dihydroxyacetone phosphate) is involved in the regenerative phase of the Calvin cycle. It helps in the regeneration of RUBP (Ribulose bisphosphate), and the ratio of DHAP to RUBP formation is about 2:3. This is essential for maintaining the cycle's continuity and for further CO2 fixation.
Conclusion: The correct ratios are: - A-5:1, - B-3:1, - C-2:3.
Statement I: Epinephrine attaches to liver cell membrane receptors and activates adenylate cyclase.
Statement II: The cyclic-AMP activates phosphorylation and converts glycogen to glucose.
Match the following scientific terms with their appropriate descriptions:
Assertion (A): Rhodospirillum is not a photoheterotroph bacteria.
Reason (R): Photoheterotrophs obtain energy from light but carbon from organic sources.
Assertion (A): New cells are always being added to the plant body by the activity of the meristem.
Reason (R): The cells/tissues arising out of the same meristem have different structures at maturity.
What are X and Y respectively in the following set of reactions?
What are X and Y respectively in the following reactions?
Observe the following reactions:
The correct answer is: