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TLS Online TPP Program

#Question id: 5812

In which situation would you expect the mutation frequency to increase over time?

#Unit 8. Inheritance Biology

  1. The deleterious effect of the mutation is balanced with the mutation rate.

  2. A lethal allele is created at a high mutation rate.

  3. A neutral allele is created at low mutation rate.

  4. All of the above.

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TLS Online TPP Program

#Question id: 12188

#Unit 2. Cellular Organization

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?
TLS Online TPP Program

#Question id: 19013

#Unit 13. Methods in Biology

Ion exchange chromatography is based on the_____________
TLS Online TPP Program

#Question id: 18662

#Unit 13. Methods in Biology

Which of the following method is particularly useful for separating isoenzymes, which are different forms of the same enzyme, often differing by only one or two amino-acid residues.
TLS Online TPP Program

#Question id: 34096

#Unit 3. Fundamental Processes

A eukaryotic genome is divided into multiple replicons, and the origin in each replicon is activated once and only once in a single division cycle. It is due to
TLS Online TPP Program

#Question id: 10684

#Unit 10. Ecological Principles

Which one of the following statements is INCORRECT?