#Question id: 10893
#Unit 10. Ecological Principles
The ___________ holds that two species with the same ecological requirements cannot coexist.
#Question id: 2773
#Unit 2. Cellular Organization
Which of the following is an algorithm designed to compare the sequence of a newly identified protein with sequences already stored in the GenBank database?
#Question id: 29535
#Unit 6. System Physiology – Plant
#Question id: 2915
#Unit 2. Cellular Organization
The structural maintenance of chromosome (SMC) proteins are extended proteins that form defined pairs by interacting through lengthy coiled-coil domains. Together with non-SMC proteins, they form multiprotein complexes that act to link two DNA helices together. Identify the SMC proteins in the figure given below and match them with their respective subunits.
i. Blue – Cohesin made up of Smc 1 and Smc 2 proteins.
ii. Green – Condensin made up of Smc 3 and Smc 4 proteins.
iii. Blue – Condensin made up of Smc 2 and Smc 4 proteins.
iv. Green – Cohesins made up of Smc 1 and Smc 3 proteins.
v. Blue – Condensin made up of Smc 1 and Smc 3 proteins.
vi. Green – Cohesins made up of Smc 2 and Smc 4 proteins.
#Question id: 13142
#Unit 10. Ecological Principles
The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.
Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.
