TLS Online TPP Program

#Question id: 11305


According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly

#Unit 2. Cellular Organization
  1. spread in a continuous layer over the inner and outer surfaces of the membrane.
  2. confined to the hydrophobic interior of the membrane.
  3. embedded in a lipid bilayer.
  4. randomly oriented in the membrane, with no fixed inside outside polarity.
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TLS Online TPP Program

#Question id: 26834

#Unit 10. Ecological Principles

A zone of junction or a transition area between two biomes called

TLS Online TPP Program

#Question id: 12471

#Unit 10. Ecological Principles

To measure the population density of monarch butterflies occupying a particular park, 100 butterflies are captured, marked with a small dot on a wing, and then released. The next day, another 100 butterflies are captured, including the recapture of 20 marked butterflies. One would estimate the population to be

TLS Online TPP Program

#Question id: 5253

#Unit 8. Inheritance Biology

In a hypothetical situation, the genes for sex pilus construction and for tetracycline resistance are located together on the same plasmid within a particular bacterium. If this bacterium readily performs conjugation involving a copy of this plasmid, then the resultshould be

TLS Online TPP Program

#Question id: 153

#Unit 1. Molecules and their Interaction Relevant to Biology

For the amino acid lysine, the Henderson-Hasselbalch equation can be applied to ________ ionization group(s)

TLS Online TPP Program

#Question id: 15843

#Unit 8. Inheritance Biology

You have isolated two temperature-sensitive mutations in phage l that you suspect may be in the same gene. These phage mutants are called ts-1 and ts-2. Each mutant will form plaques at 35˚C but not at 42˚C. You cross ts-1 to ts-2 phage by coinfecting E. coli at the permissive temperature of 35˚C. When the resulting phage lysate is plated at 35˚C you count 10,000 plaques per ml of phage lysate, but when the same phage lysate is plated at 42˚C, there are only 80 plaques per ml.           What is the distance between the ts-1 and ts-2 mutations in m.u.?