The diagram below shows the F factor and a portion of the E. coli chromosome that has three different insertion sequences (IS) of the same type as is carried on F.

                     

Describe the three different Hfrs (Hfr #1, Hfr #2 and Hfr #3) that can be formed by recombination between the IS on F and each of the IS sequences on the chromosome. Some including the positions of each of the markers (A, B, C, and D) and state which of these markers would be transferred early?

#Question id: 2102

#I Life Science/ Life Sciences Group – I-V

In which of the following environments would there be the greatest need for osmoregulation?

#Question id: 8701

#SCPH06 I Botany

The question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (for example, Intron I is the one closest to the promoter). The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.

Based on the tabular data, and assuming that time advances vertically, which phylogenetic tree is the most likely depiction of the evolutionary relationships among these five species?

#Question id: 10989

#I Life Science/ Life Sciences Group – I-V

What is the resting membrane potential of the sinus nodal fibers?

#Question id: 3863

#SCPH05 I Biotechnology

Introns in nuclear pre-mRNAs are excised by:

#Question id: 105

#SCPH28 | Zoology

Isoprenoids are lipids which neither contain nor are derived from fatty acids and include

A) steroids.

B) waxes.

C) terpenes.