The series of events by which APC/C promotes the separation of sister chromatids at anaphase.

A. all the kinetochores have attached to spindle microtubules and the spindle apparatus is properly assembled and oriented.

B. Cdc20 specificity factor associated with APC/C directs it to ubiquitinylate securin and mitotic cyclins. 

C. A protease known as separase cleaves the cohesin subunit Scc1 (Rad21), breaking the protein circles linking sister chromatids.

D. anaphase begins as poleward force exerted on the kinetochores moves the split sister chromatids toward opposite spindle poles.

E. Following securin degradation and a decrease in mitotic CDK activity.

Which of the following series is correct?

#Question id: 11292

#Part-B Specialized Branches in Biotechnology

In an pond ecosystem the _____ is always greater than the _____ .

(a) number of primary producers . . . number of secondary consumers

(b) biomass of secondary consumers . . . biomass of primary consumer

(c) assimilation efficiency of primary consumers . . . assimilation efficiency of secondary consumers

(d) biomass of primary producers . . . biomass of primary consumers

#Question id: 11293

#Part-B Specialized Branches in Biotechnology

Measurement of phytoplankton production, take sample of phytoplankton suspended in two bottles in lake. One bottle (D) is dark in colour but second bottle (L) light in colour. After some time productivity measure as follow Where Lo –oxygen concentration in light bottle, Do –oxygen concentration in Dark bottle, Io –oxygen concentration in bottle before incubation    

A)  Lo- Do                     B) Lo- Io  C) Io- Do

#Question id: 11294

#Part-B Specialized Branches in Biotechnology

A small lake has three trophic level – Phytoplankton(autotroph) , Zooplankton (herbivore ) and planktivorous fish ( primary carnivore) . In to this lake Population of some other primary carnivore introduced to study top down effect . What is expected long term consequence of this  introduction ?

#Question id: 11295

#Part-B Specialized Branches in Biotechnology

The amount of energy entering a food chain depends on the

#Question id: 11296

#Part-B Specialized Branches in Biotechnology

Which of the following statements is true?

#Question id: 11297

#Part-B Specialized Branches in Biotechnology

What is the difference between gross and net primary production?