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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?

#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.

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TLS Online TPP Program

#Question id: 3770

#Section 3: Genetics, Cellular and Molecular Biology

Semiconservative replication involves a template. What is the template?
TLS Online TPP Program

#Question id: 27320

#Section 5: Bioprocess Engineering and Process Biotechnology

Two organisms A and B with the same µmax and Yx/s are cultivated independently in batch culture. They have Ks values of 1 g.l-1 and 3 g.l-1 respectively. Given that the initial substrate concentration was 5 g/l, which of the following is TRUE after complete exhaustion of the substrate?
TLS Online TPP Program

#Question id: 3762

#Section 3: Genetics, Cellular and Molecular Biology

Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?
TLS Online TPP Program

#Question id: 3566

#Section 3: Genetics, Cellular and Molecular Biology

Two organisms, with genotypes BbDD and BBDd, are mated. Assuming independent assortment of the B/b and D/d genes, determine the genotypic ratios in offspring that would occur.
TLS Online TPP Program

#Question id: 2437

#Section 3: Genetics, Cellular and Molecular Biology

Membrane extension involves

a. bending actin filaments.                   

b. myosin II.

c. the Arp2/3 nucleation of new filaments.

d. actin depolymerization.     

e. actin polymerization.