TLS Online TPP Program

#Question id: 346


The partial negative charge in a molecule of water occurs because ________.

#I Life Science/ Life Sciences Group – I-V
  1. the oxygen atom donates an electron to each of the hydrogen atoms

  2. the electrons shared between the oxygen and hydrogen atoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus

  3. the oxygen atom has two pairs of electrons in its valence shell that are not neutralized by hydrogen atoms

  4. one of the hydrogen atoms donates an electron to the oxygen atom

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TLS Online TPP Program

#Question id: 10411

#SCPH05 I Biotechnology

Phytochrome chromophore which absorbs light known as Phytochromobilin , that are synthesized in

TLS Online TPP Program

#Question id: 10411

#SCPH06 I Botany

Phytochrome chromophore which absorbs light known as Phytochromobilin , that are synthesized in

TLS Online TPP Program

#Question id: 10412

#SCPH05 I Biotechnology

Red and far-red lights are perceived by plants through various photoreceptors including phytochromes. The red/far-red reversibility of seed germination was due to the-
a) photoreversibility of phytochrome
b) presence of red and far-red light at different fluence rate
c) Conversion of Pr to Pfr form through the effect of red light
d) equal proportion of red and far red light at same fluence rate
Which of the following combinations is correct?

TLS Online TPP Program

#Question id: 10412

#SCPH06 I Botany

Red and far-red lights are perceived by plants through various photoreceptors including phytochromes. The red/far-red reversibility of seed germination was due to the-
a) photoreversibility of phytochrome
b) presence of red and far-red light at different fluence rate
c) Conversion of Pr to Pfr form through the effect of red light
d) equal proportion of red and far red light at same fluence rate
Which of the following combinations is correct?

TLS Online TPP Program

#Question id: 10413

#SCPH05 I Biotechnology

Following are certain statements are related to the effect of red and far-red light;
a) under a dense canopy much of the red light is absorbed by plant pigments, resulting in transmittance of mostly far-red light
b) Pr (red) has highest photon flux at 680 nm while Pfr (far-red) has highest photon flux at 730nm
c) Pfr far-red light–absorbing form, which is considered to be the physiologically active form of phytochrome
d) R:FR ratio is strongly affected by the presence of a canopy because chlorophyll absorbs far-red but not red light
Which one of the combinations of above statements is incorrect?

TLS Online TPP Program

#Question id: 10413

#SCPH06 I Botany

Following are certain statements are related to the effect of red and far-red light;
a) under a dense canopy much of the red light is absorbed by plant pigments, resulting in transmittance of mostly far-red light
b) Pr (red) has highest photon flux at 680 nm while Pfr (far-red) has highest photon flux at 730nm
c) Pfr far-red light–absorbing form, which is considered to be the physiologically active form of phytochrome
d) R:FR ratio is strongly affected by the presence of a canopy because chlorophyll absorbs far-red but not red light
Which one of the combinations of above statements is incorrect?