TLS Online TPP Program

#Question id: 11147


The concentrations of ions are very different inside and outside a nerve cell due to ________.

#Unit 7. System Physiology – Animal
  1. osmosis
  2. diffusion
  3. sodium-potassium pumps
  4. symports and antiports
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TLS Online TPP Program

#Question id: 4715

#Unit 11. Evolution and Behavior

Claytonia virginica is a woodland spring herb with flowers that vary from white, to pale pink, to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time?

TLS Online TPP Program

#Question id: 35

#Unit 1. Molecules and their Interaction Relevant to Biology

Arrange the following molecular components of an E. coli cell in terms of their percentage of total weight cell.

TLS Online TPP Program

#Question id: 23683

#Unit 13. Methods in Biology

What is the enzymatic function of restriction enzymes?

TLS Online TPP Program

#Question id: 15667

#Unit 8. Inheritance Biology

You set up the following dihybrid mapping cross in fruit flies. 
P e+e+ roro cq cq x ee ro+ro+ cq+cq+. After backcrossing F1 males to ee roro cq cq females, you get the following results: gray body, rough eyes, claret eyes 576; ebony body, smooth, red eyes 564. How can you explain this result?

TLS Online TPP Program

#Question id: 27413

#Unit 1. Molecules and their Interaction Relevant to Biology

Sandhoff disease are related to the mutation in which of the following enzyme