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TLS Online TPP Program

#Question id: 11983

Which of the following is a behavioral pattern resulting from an ultimate cause?

#Unit 10. Ecological Principles
  1. A male robin attacks a red tennis ball because it resembles the breast of another male.
  2. A male robin attacks a red tennis ball because hormonal changes in spring increase its aggression.
  3. A male robin attacks a red tennis ball because a part of its brain is stimulated by red objects.
  4. A male robin attacks a red tennis ball because it confuses it with an encroaching male who will steal his territory.
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TLS Online TPP Program

#Question id: 11591

#Unit 6. System Physiology – Plant

Gibberellins biosynthesis completes in almost three organelles
TLS Online TPP Program

#Question id: 11592

#Unit 6. System Physiology – Plant

Gibberellin biosynthesis precursor is____
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?
TLS Online TPP Program

#Question id: 11594

#Unit 6. System Physiology – Plant

Given some compounds that are the first stage inhibitor of gibberellin biosynthesis except?
TLS Online TPP Program

#Question id: 11595

#Unit 6. System Physiology – Plant

Paclobutrazol and other inhibitors of P450 monooxygenases specifically inhibit the stage of gibberellin biosynthesis
TLS Online TPP Program

#Question id: 11596

#Unit 6. System Physiology – Plant

Which enzyme catalyzes  all the reactions involving the successive oxidation steps of carbon 20 between GA53 and GA20, including the removal of C-20 as CO2?