plants such as maize whose vascular tissues are surrounded by two distinctive photosynthetic cell types In this anatomical context, the transport of CO2 from the external atmosphere to the bundle sheath cells proceeds through five successive stages such as;

a.) Fixation of the HCO3 − in phosphoenolpyruvate by PEP Case in the bundle sheath cells

b.) Transport of the four-carbon acids (malate or aspartate) to mesophyll cells that surround the vascular bundles

c.) Decarboxylation of the four-carbon acids and generation of CO2 which is then reduced to carbohydrate via the Calvin–Benson cycle

d.) Transport of the three-carbon backbone (pyruvate or alanine) formed by the decarboxylation step back to the mesophyll cells

e.) Regeneration of phosphoenolpyruvate, the HCO3 – acceptor

Which of the following stages are FALSE?

TLS Online TPP Program

#Question id: 10510

#Unit 6. System Physiology – Plant

Constitutive chemical defenses are effective against many different herbivores, including insects and mammals. Hemlock (Cicuta sp.) produces which toxins that a polyacetylene prolongs the repolarization of neuronal action potentials.

TLS Online TPP Program

#Question id: 11872

#General Aptitude

The greatest number of four digits which when divided by 3, 5, 7, 9 leave remainders 1, 3, 5, 7 respectively is

TLS Online TPP Program

#Question id: 400

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we can reasonably conclude that ________.

TLS Online TPP Program

#Question id: 20006

#Unit 12. Applied Biology

Under stress it is made directly from glutamate, the first two reactions of the pathway being catalyzed by a single enzyme 

TLS Online TPP Program

#Question id: 4818

#Unit 3. Fundamental Processes

Researchers found a strain of E. coli bacteria that had mutation rates one hundred times higher than normal. Which of the following statements correctly describes the most likely cause of these results?