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TLS Online TPP Program

#Question id: 12711

Various sensors monitor ROS levels in cells; an increase in ROS activates a signal transduction network. ROS scavenging is carried out by antioxidant molecules ____X_________and by antioxidant enzymes such as____Z_________

#Unit 6. System Physiology – Plant
  1. X-Ascorbate,  glutathione,  vitamin E,  and carotenoids ; Z- superoxide dismutase, ascorbate peroxidase, and catalase
  2. X-Co-factors, vitamin C, and carotenoid molecules; Z- superoxide dismutase, and catalase
  3. X- superoxide dismutase, ascorbate peroxidase, and catalase Z- Ascorbate,  glutathione,  vitamin E,  and carotenoids 
  4. X- Ions,  Co-factors, vitamins, minerals Z- superoxide dismutase, ascorbate peroxidase, and catalase
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TLS Online TPP Program

#Question id: 11849

#Unit 6. System Physiology – Plant

According to chemiosmotic model for polar auxin transport, auxin _____A_______is driven by the______B________ across the plasma membrane, while auxin ___C_____is driven by the_________D_________
TLS Online TPP Program

#Question id: 17286

#Unit 13. Methods in Biology

Consider the following grouped frequency distribution :
 
What is the median of the distribution ? 
TLS Online TPP Program

#Question id: 419

#Unit 1. Molecules and their Interaction Relevant to Biology

Biological oxidation-reduction reactions never involve:
TLS Online TPP Program

#Question id: 23781

#Unit 7. System Physiology – Animal

Rhodopsin is comprised of 
a. An ketone of vitamin A
b. Opsin protein (GPCR)
c. An aldehyde of vitamin A
d. Retinal
TLS Online TPP Program

#Question id: 16955

#Unit 4. Cell Communication and Cell Signaling

Stage thymocytes express neither CD4 nor CD8, markers associated with mature T cells. They are therefore called double negative (DN) cells. DN cells first travel to the region under the thymic capsule, a region referred to as the ________, where they proliferate and begin to generate their T-cell receptors. Thymocytes that successfully express TCRs begin to express both CD4 and CD8, becoming double positive (DP) cells, and populate the cortex, the site where most (85% or more) immature T cells are found.