TLS Online TPP Program

#Question id: 2123


Which of these statements about the composition of membranes is true?

#XL - S Microbiology
  1. All biological membranes contain cholesterol.

  2. Free fatty acids are major components of all membranes.

  3. The inner and outer membranes of mitochondria have different protein compositions.

  4. The lipid composition of all membranes of eukaryotic cells is essentially the same.

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TLS Online TPP Program

#Question id: 9608

#XL - S Microbiology

Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?

TLS Online TPP Program

#Question id: 9609

#XL - S Microbiology

Dozens of potato varieties exist, differing from each other in potato-tuber size, skin color, flesh color, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classification scheme is most likely to come from an adherent of the phylocode method of classification?

TLS Online TPP Program

#Question id: 9610

#XL - S Microbiology

The term ʺhomoplasyʺ is most applicable to which of these features?

TLS Online TPP Program

#Question id: 9611

#XL - S Microbiology

If, someday, an archaean cell is discovered whose SSU-rRNA sequence is more similar to that of humans than the sequence of mouse SSU-rRNA is to that of humans, the best explanation for this apparent discrepancy would be

TLS Online TPP Program

#Question id: 9611

#XL - R Botany

If, someday, an archaean cell is discovered whose SSU-rRNA sequence is more similar to that of humans than the sequence of mouse SSU-rRNA is to that of humans, the best explanation for this apparent discrepancy would be

TLS Online TPP Program

#Question id: 9612

#XL - S Microbiology

The best classification system is that which most closely