Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 35810
TLS Online TPP Program

#Question id: 23882

Plants are more readily manipulated by genetic engineering than are animals because

#Unit 13. Methods in Biology
  1. plant genes do not contain introns.
  2. more vectors are available for transferring recombinant DNA into plant cells.
  3. a somatic plant cell can often give rise to a complete plant.
  4. genes can be inserted into plant cells by microinjection.
More Questions
TLS Online TPP Program

#Question id: 15818

#Unit 8. Inheritance Biology

You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.

What is the maximum number of genes that these 20 mutants could represent?
TLS Online TPP Program

#Question id: 14778

#Unit 13. Methods in Biology

Two dice are thrown the probability of getting an odd number on the one and a multiple of 3 on the other is
TLS Online TPP Program

#Question id: 20982

#Unit 12. Applied Biology

Which is considered as the most recalcitrant of the BTEX compounds, and of greatest regulatory concern because of its associated health impacts?
TLS Online TPP Program

#Question id: 9191

#Unit 9. Diversity of Life Forms

When an arborist prunes a limb off a valuable tree, he or she usually paints the cut surface. The primary purpose of the paint is to
TLS Online TPP Program

#Question id: 24511

#Unit 10. Ecological Principles

During a case, the parasitic worm Plagiorhynchus cylindraceus, that lives in the intestines of songbirds such as starling. They produce eggs that exit with the host feces, the feces are eaten by foraging pillbugs. The eggs hatch into a juvenile infective stage. Eventually, the infected pillbugs are eaten by birds and the life cycle continues. What will predict about these case given above?