Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6909
TLS Online TPP Program

#Question id: 10128

PSII also involve in oxidation of water molecules, water is a very stable molecule that’s why  Oxidation of water to form molecular oxygen is very difficult, Many studies have provided a substantial amount of information about the process known;

which of the following are false ?

#Unit 6. System Physiology – Plant
  1. The photosynthetic oxygen-evolving complex is the only known biochemical system that carries out water oxidation process
  2. The protons produced by water oxidation are released into the lumen of the thylakoid, not directly into the stromal compartment because of the vectorial nature of the membrane
  3. The fact that the oxygen-evolving complex is localized near the exterior surface of the thylakoid membrane
  4. The protons produced by water oxidation are eventually transferred from the lumen to the stroma by translocation through the ATP synthase, In this way, the protons released during water oxidation contribute to the electrochemical potential driving ATP formation.
More Questions
TLS Online TPP Program

#Question id: 12395

#Unit 6. System Physiology – Plant

In theory, auxin could increase the rate of proton extrusion by two possible mechanisms:
I) H+-ATPase activation
II) H+-ATPase synthesis
a) Auxin involves in the activation of ATP-driven proton-pump (H+-ATPase) indirectly
b) ABPs appear to be able to activate the plasma membrane H+-ATPase in the presence of auxin
c) Activity of the H+- ATPase is repressed by the C-terminal domain of the enzyme, which can block the catalytic site  in absence of auxin
d) The protein is synthesized on the rough endoplasmic reticulum and targeted via the secretory pathway to the plasma membrane
Find out the correct explanation of given mechanisms.
TLS Online TPP Program

#Question id: 23770

#Unit 7. System Physiology – Animal

What is the function of rods and cones in the eye?
TLS Online TPP Program

#Question id: 27117

#Unit 4. Cell Communication and Cell Signaling

Most tumors have an unique property to induce the formation of new blood vessels that invade the tumor andnourish. This process is known as
TLS Online TPP Program

#Question id: 1465

#Unit 4. Cell Communication and Cell Signaling

Which of the following processes do normal proto-oncogenes typically exhibit?
TLS Online TPP Program

#Question id: 11593

#Unit 6. System Physiology – Plant

Following are given stages of gibberellin biosynthetic pathway;

a) Geranylgeranyl diphosphate (GGPP) is converted to ent-kaurene  via copalyl diphosphate (CPP) in endoplasmic reticulum

b) In the endoplasmic reticulum, conversion of ent-kaurene into GA12 or GA53 depending on whether the GA is hydroxylated at carbon 13

c) the conversion of GA12 or GA53 into other GAs in cytosol proceeds with a series of oxidations at carbon 20

d) GA20 is then oxidized to the active gibberellin, GA1, by a 3β-hydroxylation reaction

Which of the following is the correct statements of GA biosynthesis?