Many mouse genes are “tissue-specific,” that is, they are present throughout the body but are expressed in only one of the animal’s many tissue types. (Other mouse genes are expressed throughout the body, or in multiple tissues.) Geneticists can study the regulation of a mouse gene by fusing the gene’s promoter region to the LacZ coding sequence and injecting the construct to create a transgenic mouse. Fusion of the mouse amylase promoter to LacZ yielded a Pamylase-LacZ construct.              

Mice heterozygous for the resulting Pamylase-LacZ  transgene displayed the LacZ expression exclusively in the pancreas. Would you expect homozygotes for the transgene to also display LacZ expression in the pancreas?.

#Question id: 11730

#Unit 6. System Physiology – Plant

Following are some statements regarding plant hormones.

a) Auxin and Cytokinin promote cell division

b) Auxin and Ethylene can cause similar plant responses, such as induction of flowering in pineapple and inhibition of stem elongation

c) cytokinin and ethylene signal transduction pathways are derived from the bacterial two-component regulatory system mainly multistep version

d) Gibberellins Are Synthesized via the terpenoid Pathway

e) GA promotes seed dormancy while ABA causes seed germination

Which of the following from the given above combination is incorrect?

#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