Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 11003
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?

#Section 3: Genetics, Cellular and Molecular Biology

  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.

More Questions
TLS Online TPP Program

#Question id: 3324

#Section 3: Genetics, Cellular and Molecular Biology

If only 20 males and 20 female grizzlies exist today, but only 10 of the males and 6 female breed, what are effective population size?
TLS Online TPP Program

#Question id: 12729

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

When the two antiparallel strands of DNA are held together partly by the weak forces between complementary bases and partly by hydrophobic interaction between adjacent , stacked base pairs termed as_____
TLS Online TPP Program

#Question id: 14319

#Section 5: Bioprocess Engineering and Process Biotechnology

Both Saccharomyces cerevisiae yeast and Zymomonas mobilis bacteria produce ethanol from glucose under anaerobic conditions without external electron acceptors. The biomass yield from glucose is 0.11 g g-1 for yeast and 0.05 g g-I for Z. mobilis. In both cases the nitrogen source is NH3. Both cell compositions are represented by the formula CH1.800.5N0.2. What is the yield of ethanol from glucose by Saccharomyces cerevisiae yeast?
TLS Online TPP Program

#Question id: 24084

#Section 5: Bioprocess Engineering and Process Biotechnology

The first-order reaction A → B, has k = 5.67 s–1. If [A]0 = 0.500 M, how long will it take [A] = 0.124 M?
TLS Online TPP Program

#Question id: 2326

#Section 3: Genetics, Cellular and Molecular Biology

The movement of chromosomes during mitosis is due to the: