Given below are few statements regarding the cytokinin signalling pathway;

a) Cytokinin inhibits the activation of a Cdc25- like phosphatase, whose role is to remove an inhibitory phosphate group from the Cdc2 kinase

b) Cytokinin oxidase irreversibly inactivates cytokinins, and it could be important in regulating or limiting cytokinin effects

c) Cytokinin signal transduction pathway is completed on multiple places such as ER, Cytosol and Nucleus

d) Elevation of endogenous cytokinin levels in transgenic Arabidopsis results in overexpression of the KNOTTED homeobox transcription factor homologs KNAT1 and STM—genes 

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

#Question id: 5140

#Unit 5. Developmental Biology

Following statements regarding to the Ectodermal competence and the ability to respond to the optic vesicle inducer in Xenopus.

A. The optic vesicle is able to induce lens formation in the posterior portion of the ectoderm but not in the anterior portion.

B. If the optic vesicle is removed, the surface ectoderm forms either an abnormal lens or no lens at all.

C. Only head ectoderm is competent to respond to the signals from the optic vesicle by producing a lens.

D. The head ectoderm appears to secrete two paracrine factors BMP 4 and FGF8, which involves in the activation of lens-specific genes such as crystallin.

Which of the following combination is incorrect?

#Question id: 29490

#Unit 6. System Physiology – Plant

#Question id: 761

#Unit 1. Molecules and their Interaction Relevant to Biology

In a DNA double helix each type of base forms a stable base pair with only one type of base. When bases on an RNA strand are involved in base pairing, which bases can form stable base pairs with more than one type of base?

#Question id: 30054

#Unit 7. System Physiology – Animal

The fourth heart sound is produced by:

#Question id: 24605

#Unit 2. Cellular Organization