TLS Online TPP Program

#Question id: 4125


Which of the following are features of the wobble hypothesis?

#Unit 3. Fundamental Processes
  1. A naturally occurring tRNA exists in yeast that can read both arginine and lysine codons.

  2. A tRNA can recognize only one codon.

  3. Some tRNAs can recognize codons that specify two different amino acids, if both are nonpolar.

  4. The “wobble” occurs only in the first base of the anticodon.

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TLS Online TPP Program

#Question id: 33345

#Unit 2. Cellular Organization

A culture was started by inoculating the medium with 100 cells having a generation time of 2 hours. Assuming the culture grows in ideal synchrony, what will be the number of cells in the culture at 8 hours?

TLS Online TPP Program

#Question id: 33346

#Unit 2. Cellular Organization

Growth of an organism was monitored at regular intervals of times and shown in the graph below. Around what time is the rate of growth zero?


TLS Online TPP Program

#Question id: 33347

#Unit 2. Cellular Organization

A rapidly growing bacterial species such as E. coli exhibits a typical phase of growth cycle in liquid nutrient broth (lag phase  log phase  stationary phase → death phase). If a bacterial culture has starting density of 103 cells/ml has a lag time of 10 minutes and a generation time of 10 minutes, what will the cell density be at (cells/ml) 50 minutes?

TLS Online TPP Program

#Question id: 33351

#Unit 1. Molecules and their Interaction Relevant to Biology

When exposed to oxygen, isolated heme

TLS Online TPP Program

#Question id: 33352

#Unit 1. Molecules and their Interaction Relevant to Biology

The O2 dissociation of myoglobin can be characterized by its fractional saturation, YO2, which is defined as

TLS Online TPP Program

#Question id: 33353

#Unit 1. Molecules and their Interaction Relevant to Biology

Two proteins, X and Y, bind to the same ligand, A, with the binding curves shown below. Which statement is incorrect?