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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?

#XL - Q Biochemistry

  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: 17819

#XL - S Microbiology

During RNA extraction, the homogenate is first treated with
TLS Online TPP Program

#Question id: 17802

#XL - R Botany

Which of the following was not a challenge for survival of the first land plants? 
TLS Online TPP Program

#Question id: 363

#XL - S Microbiology

What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)
TLS Online TPP Program

#Question id: 8889

#XL - R Botany

What would be the most effective method of reducing the incidence of blood flukes in a human population?
TLS Online TPP Program

#Question id: 20215

#XL - P Chemistry

Which species possesses pyramidal shape ?