The toxicity of cry protein toxins can be increased by the following approaches

1. Site directed mutagenesis within the toxin encoding region

2. Production of hybrid cry genes by fusing selected toxin domains of two or more different cry genes

Which of the following approaches could be correct?

#Question id: 11731

#Unit 6. System Physiology – Plant

Following are some statements regarding the Cytokinin, which of the following is incorrect?

#Question id: 11732

#Unit 6. System Physiology – Plant

Cytokinins are defined as compounds that have biological activities similar to those of trans-zeatin. These activities include the ability to do the following:

a) Induce cell division in callus cells in the presence of an auxin

b) Promote bud or root formation from callus cultures when in the appropriate molar ratios to auxin

c) promote senescence of leaves

d) Promote expansion of dicot cotyledons

Which one of the following activities are incorrect?

#Question id: 11733

#Unit 6. System Physiology – Plant

The synthetic cytokinin compounds that have not been identified in plants, these are;

#Question id: 11734

#Unit 6. System Physiology – Plant

Some molecules act as cytokinin antagonists, which are able to block the action of cytokinins that is

#Question id: 11735

#Unit 6. System Physiology – Plant

In cytokinin biosynthesis is the addition of the isopentenyl side chain from DMAPP to an adenosine moiety. The plant and bacterial IPT enzymes differ substrate used;

a) the bacterial enzyme utilizes AMP

b) the plant enzyme appears to utilize AMP

c) the bacterial enzyme utilizes both ADP and ATP

d) the plant enzyme appears to utilize both ADP and ATP

#Question id: 11736

#Unit 6. System Physiology – Plant

Many plant tissues contain the enzyme cytokinin oxidase, which cleaves the side chain, except