TLS Online TPP Program

#Question id: 15790


During the lag phase of Bacterial growth, which of the following statements are correct?

#Section 5: Bioprocess Engineering and Process Biotechnology
  1. Cell mass may increase a little, without an increase in cell number density.
  2. Microorganisms reorganize their molecular constituents when they are transferred to a new medium
  3. Low concentration of some nutrients and growth factors may also cause a long lag phase.
  4. The age of the inoculum culture has no effect on the length of lag phase
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TLS Online TPP Program

#Question id: 3784

#Section 3: Genetics, Cellular and Molecular Biology

In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules?

TLS Online TPP Program

#Question id: 3785

#Section 3: Genetics, Cellular and Molecular Biology

The elongation of the leading strand during DNA synthesis

TLS Online TPP Program

#Question id: 3786

#Section 3: Genetics, Cellular and Molecular Biology

E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?

TLS Online TPP Program

#Question id: 3787

#Section 3: Genetics, Cellular and Molecular Biology

A biochemist isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. When she adds some DNA to the mixture, replication occurs, but each DNA molecule consists of a normal strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture?

TLS Online TPP Program

#Question id: 3788

#Section 3: Genetics, Cellular and Molecular Biology

The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?

TLS Online TPP Program

#Question id: 3790

#Section 3: Genetics, Cellular and Molecular Biology

Semiconservative replication of DNA means that: