Shell coiling of the snail Limnaea peregra(genetic maternal effect)  the shell coils (s+s+) which is termed dextral coiling, while some snails exhibiting sinistral coiling (ss). The allele for dextral (s +) is dominant over the allele for sinistral (s). If a male homozygous for dextral alleles (s+s+) is crossed with a female homozygous for sinistral alleles (ss) all of the F1 are heterozygous (s+s) and have a sinistral shell. If these F1 snails are self-fertilized, what is the phenotype of the F2 snail?

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?

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#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?

TLS Online TPP Program

#Question id: 33354

#Unit 1. Molecules and their Interaction Relevant to Biology

Oxygen binding to iron in heme can shown as

TLS Online TPP Program

#Question id: 33355

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement stands incorrect