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TLS Online TPP Program

#Question id: 24263

Choose the incorrect option

#Unit 2. Cellular Organization

  1. The two H2A.H2B dimers each associate with 30 bp of DNA on either side of the central 60 bp of DNA bound by H3 and H4.

  2. Using the clock analogy again, the DNA associated with H2A.H2B is located from 5 o’clock to 9 o’clock on either face of the nucleosome disc.
  3. Together, the two H2A.H2B dimers form the upper part of the histone octamer located across the disc from the DNA ends
  4. Each nucleosome added to a covalently closed circular template changes the linking number of the associated DNA by approximately –1.2.
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TLS Online TPP Program

#Question id: 947

#Unit 1. Molecules and their Interaction Relevant to Biology

 Which is not part of the synthesis reactions for histidine?
TLS Online TPP Program

#Question id: 8858

#Unit 9. Diversity of Life Forms

Which of these factors, when used to label the horizontal axis of the graph in Figure 33.1, would account most directly for the shape of the plot?


TLS Online TPP Program

#Question id: 12653

#Unit 6. System Physiology – Plant

In tobacco, virus-induced gene silencing of the genes for which type of  kinases that are the members of the MAPK family, which are involved in the regulation of antiherbivore defenses?
TLS Online TPP Program

#Question id: 9207

#Unit 9. Diversity of Life Forms

Loss of biodiversity matters not only with regard to mammals or other vertebrates, but also microbes. Why are microbes worthy of discovery and protection from extinction?
TLS Online TPP Program

#Question id: 10332

#Unit 9. Diversity of Life Forms

The four-chambered hearts of birds and the four-chambered hearts of mammals evolved independently of each other. If one were unaware of this independence, then one might logically conclude that