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?

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#Question id: 2659

#Unit 2. Cellular Organization

The correct option regarding the lac operon in E.coli from the following is

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#Question id: 27012

#Unit 10. Ecological Principles

Competition is occur in between individuals of two different species, is a type of___

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#Question id: 1426

#Unit 4. Cell Communication and Cell Signaling

Which of the following promotes angiogenesis?

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#Question id: 11277

#Unit 10. Ecological Principles

If a species is a keystone predator, then its removal from a community should

(A) Increase population size of the predator’s preferred prey

(B) decrease species diversity in the prey community

(C) decrease productivity of the predator’s preferred prey

(D) increase species diversity in the prey community

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#Question id: 12861

#General Aptitude

The length of two sides of an isosceles triangle are 15 and 22 respectively. What are the possible values of perimeter ?