What was the day of the year of the week on 30 January 2006 ?

TLS Online TPP Program

#Question id: 11494

#Unit 2. Cellular Organization

How do aquaporins allow the passage of H2O but not H3O+?

TLS Online TPP Program

#Question id: 873

#Unit 1. Molecules and their Interaction Relevant to Biology

Intrinsically disordered proteins have properties that are distinct from classical structured proteins

A. Are characterized by sequences rich in certain polar and charged amino acids (Gln, Ser, Pro, Glu, Lys, Gly, and Ala)

B. Ordered proteins tend to participate in signaling and regulation, whereas Intrinsically disordered proteins are involved largely in catalytic reactions, transport processes, and structural functions.

C. Nearly half of all prokaryotic proteins contain long disordered segments, whereas only a few percent of eukaryotic proteins do.

D. Often adopt a specific secondary or tertiary structure when they bind to other molecules such as ions, organic molecules, proteins, and nucleic acids.

TLS Online TPP Program

#Question id: 23883

#Unit 13. Methods in Biology

A paleontologist has recovered a bit of tissue from the 400-year-old preserved skin of an extinct dodo (a bird). The researcher would like to compare a specific region of the DNA from the sample with DNA from living birds. Which of the following would be most useful for increasing the amount of dodo DNA available for testing?

TLS Online TPP Program

#Question id: 12780

#Unit 10. Ecological Principles

The producers in aquatic ecosystems include organisms in which of the following groups?

TLS Online TPP Program

#Question id: 29104

#Unit 8. Inheritance Biology

At which phases of the cell cycle are seen that the number of chromosome per cell is equals to the number of DNA molecules per cell ?