Which of the following technique will be most effective for IAA concentrations of about 0.02 to 0.2 mg L–1

#Question id: 5234

#Unit 11. Evolution and Behavior

Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?

#Question id: 1449

#Unit 4. Cell Communication and Cell Signaling

Src is a:

#Question id: 2653

#Unit 2. Cellular Organization

The sequence of the structural genes in the lac operon is

#Question id: 4033

#Unit 3. Fundamental Processes

Which of the following statements is false regarding the sigma-factor? 

A. It does not have a DNA-binding domain. 

B. Interaction with the core enzyme unmasks the DNA-binding region. 

C. Subregions 2.4 and 4.4 are involved in promoter recognition. 

D. It can also bind to the nontemplate strand. 

#Question id: 7765

#Unit 5. Developmental Biology

The enzyme complex or gene that maintains telomere integrity is________, which acts as an antisenescence complex. Mice and humans with its deficiencies age prematurely (Mitchell et al. 1999). Overexpressing or reactivating it in senescent cells extends longevity in mice without increasing cancer,