TLS Online TPP Program

#Question id: 612


 The quaternary structure of hemoglobin changes from the T state to the R state ________.

#Section 2: General Biology
  1. when at least one subunit on each dimeric unit (αβ dimer) is oxygenated

  2. only after four molecules of O2 are bound

  3. after the binding of one molecule of O2 causes a change in the primary structure

  4. when hemoglobin is completely deoxygenated

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TLS Online TPP Program

#Question id: 3286

#Section 3: Genetics, Cellular and Molecular Biology

 In a human population, the gene frequencies of the alleles for the ABO system are as follows:

A = 29%                         B = 7%                                    0=64%

Assuming complete random mating and Hardy-Weinberg equilibrium,

What are the blood type A frequencies in this population?

TLS Online TPP Program

#Question id: 3287

#Section 3: Genetics, Cellular and Molecular Biology

Which statement is not an assumption of the Hardy–Weinberg law?

a. The allelic frequencies (p and q) are equal.

b. The population is randomly mating.

c. The population is large.

d. Locus is di-allelic

TLS Online TPP Program

#Question id: 3288

#Section 3: Genetics, Cellular and Molecular Biology

Migration causes changes in the allelic frequency of a population by introducing alleles from other populations. The magnitude of change due to migration depends on

TLS Online TPP Program

#Question id: 3289

#Section 3: Genetics, Cellular and Molecular Biology

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: 3290

#Section 3: Genetics, Cellular and Molecular Biology

Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms?

TLS Online TPP Program

#Question id: 3291

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is the most predictable outcome of increased gene flow between two populations?