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TLS Online TPP Program

#Question id: 1121

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

#Section 3: Genetics, Cellular and Molecular Biology

  1. Cell-signaling pathways are seen in "primitive" cells such as bacteria and yeast.

  2. Bacteria and yeast cells signal each other in a process called quorum sensing.

  3. Signal transduction molecules identified in distantly related organisms are similar.

  4. Most signals in all types of cells are received by cell surface receptors.

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TLS Online TPP Program

#Question id: 2785

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

Which of the following terms describes when a chromosome is replicated everywhere except the telomeres and centromere, but the daughter chromosomes do not separate?
TLS Online TPP Program

#Question id: 2793

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

Chromosome painting involves
TLS Online TPP Program

#Question id: 2921

#Section 3: Genetics, Cellular and Molecular Biology

During which stage of the cell cycle is the chromosome content of a mammalian liver cell 1n?
TLS Online TPP Program

#Question id: 2922

#Section 3: Genetics, Cellular and Molecular Biology

Human genes/proteins that regulate the cell cycle are most easily isolated by:
TLS Online TPP Program

#Question id: 2923

#Section 3: Genetics, Cellular and Molecular Biology

Injection of an immature Xenopus oocyte with MPF induces:
TLS Online TPP Program

#Question id: 2925

#Section 3: Genetics, Cellular and Molecular Biology

Mitotic cyclin levels in early Xenopus embryos are regulated by: