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TLS Online TPP Program

#Question id: 3783

What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?

#Unit 3. Fundamental Processes

  1. The origins of replication occur only at the 5′ end.

  2. Helicases and single-strand binding proteins work at the 5′ end.

  3. DNA polymerase can join new nucleotides only to the 3′ end of a pre-existing strand, and the strands are antiparallel.

  4. DNA ligase works only in the 3′ → 5′ direction.

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TLS Online TPP Program

#Question id: 33284

#Unit 2. Cellular Organization

Assembly of the contractile ring results in part from the local formation of new actin filaments, which depends on:
TLS Online TPP Program

#Question id: 22972

#Unit 7. System Physiology – Animal

Parathyroid hormone stimulates calcitriol production in the kidney by increasing the synthesis of 
TLS Online TPP Program

#Question id: 12983

#Unit 10. Ecological Principles

The following questions refer to Figure which depicts the age structure of three populations.

Assuming these age-structure diagrams describe human populations, which population is likely to experience zero population growth (ZPG)?
TLS Online TPP Program

#Question id: 24623

#Unit 2. Cellular Organization

Most known genetic defects in human genes are due to the
TLS Online TPP Program

#Question id: 19866

#Unit 13. Methods in Biology

Which of the following variants of PCR has been devised to increase the specificity of PCR without lowering the efficiency by variation annealing temperature?