TLS Online TPP Program

#Question id: 11829


The certain cyclic olefin compounds, have been shown to block ethylene breakdown without inhibiting ethylene action?

#Unit 6. System Physiology – Plant
  1. 1,4-cyclohexadiene
  2. amino-oxyacetic  acid
  3. aminoethoxy-vinylglycine
  4. N-malonyl ACC
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TLS Online TPP Program

#Question id: 5012

#Unit 11. Evolution and Behavior

A

Silurian

I

Seed plants appear

B

Devonian

II

Gymnosperms dominant

C

Carboniferous

III

Invasion of land by primitive land plants

D

Jurassic

IV

first reptiles

TLS Online TPP Program

#Question id: 12876

#General Aptitude

A cylindrical vessel of diameter 24 cm contains some water. If two spheres of radii 6 cm each are lowered into the water until they are completely immersed,then the water level (in cm) in the vessel will rise by

TLS Online TPP Program

#Question id: 2667

#Unit 2. Cellular Organization

A regulatory protein that attracts RNA polymerase to its promoter is an example of what type of regulation?

TLS Online TPP Program

#Question id: 5453

#Unit 8. Inheritance Biology

On which of the following factors, the amount of melanin produced depends?

TLS Online TPP Program

#Question id: 10465

#Unit 6. System Physiology – Plant

This feature is an adaptive, as the redistribution of chloroplasts within the cells modulates light absorption and prevents photodamage, diagram shows of chloroplast distribution patterns in Arabidopsis palisade cells in response to different light intensities;

                                        

m) A-low light, B-high light, C-darkness

n) A-high light, B-darkness, C-low light

Based on the above light intensities, each shows different chloroplasts position such as,

i) chloroplasts avoid sunlight by migrating to the side walls of palisade cells

ii) chloroplasts move to the bottom of the cell, although the physiological function of this position is unclear

iii) chloroplasts optimize light absorption by accumulating at the upper and lower sides of palisade cells

Which of the following correct combinations shows light intensities and chloroplast movements?