Which of the following factors will affect population growth rates?

TLS Online TPP Program

#Question id: 10430

#Unit 6. System Physiology – Plant

Following are given some characteristics of Signals from Sunlight;

a) phyA is rapidly degraded as Pfr and controls plant responses to VLFRs and the far-red HIRs

b) An important role for phyB in de-etiolation

c) phyA must be the photoreceptor involved in the perception of continuous far-red light because its Pfr form is stable

d) Responses mediated by phyD and phyE include petiole and internode elongation and the control of flowering time

Which of the following combinations from the above statements is correct?

TLS Online TPP Program

#Question id: 10431

#Unit 6. System Physiology – Plant

The signal transduction pathways that lead to physiological or developmental responses, these responses fall into two general categories;

a) Ion fluxes, which cause relatively rapid turgor responses

b) the possible chain of events constituting the signal transduction pathways that bring about these effects

c) Altered gene expression, which typically results in longer-term responses

d) Gene expression altered shows short-term response

Which of the following combinations from above given general categories is true?

TLS Online TPP Program

#Question id: 10432

#Unit 6. System Physiology – Plant

Phytochrome interacting factors (PIFs) act as negative regulators of photomorphogenesis such as;

a) Most PIFs are constitutive activators of genes that are expressed in the dark or in response to shade

b) Most PIFs are constitutive repressor of genes that are expressed in the dark or in response to shade

c) In the light, Pfr promotes the degradation of the PIFs, blocking the transcription of skotomorphogenesis genes

d) In the light, Pfr promotes the activation of the PIFs, blocking the transcription of skotomorphogenesis genes

Which of the following combinations is correct about PIFs?

TLS Online TPP Program

#Question id: 10433

#Unit 6. System Physiology – Plant

Time course for inducing transcription. Kinetics of the induction of transcripts for a MYB-related transcription factor (MYB) and the light-harvesting chlorophyll a/b–binding protein (LHCB) in Arabidopsis, which of the following graph represents the correct relation between MYB and LHCB?

TLS Online TPP Program

#Question id: 10434

#Unit 6. System Physiology – Plant

Movement of the phytochrome into the nucleus takes place, which of the following is incorrect prediction about this movement?

TLS Online TPP Program

#Question id: 10435

#Unit 6. System Physiology – Plant

What happens when Pfr moves to the nucleus?