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TLS Online TPP Program

#Question id: 2111

The membranes of winter wheat are able to remain fluid when it is extremely cold by:

#Section 2: General Biology

  1. increasing the proportion of unsaturated phospholipids in the membrane

  2. decreasing the percentage of cholesterol molecules in the membrane

  3. decreasing the number of hydrophobic proteins in the membrane

  4. increasing the proportion of glycolipids in the membrane

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TLS Online TPP Program

#Question id: 2921

#Section 3: Genetics, Cellular and Molecular Biology

During which stage of the cell cycle is the chromosome content of a mammalian liver cell 1n?
TLS Online TPP Program

#Question id: 3868

#Section 3: Genetics, Cellular and Molecular Biology

The sigma factor of E. coli RNA polymerase: 
TLS Online TPP Program

#Question id: 1907

#Section 2: General Biology

Which of the following statements is TRUE of HLA-G?
TLS Online TPP Program

#Question id: 3781

#Section 3: Genetics, Cellular and Molecular Biology

Hershey and Chase used a DNA-based virus for their work. How might the results have been different if they had used an RNA virus?
TLS Online TPP Program

#Question id: 10189

#Section 2: General Biology

A very common isotope substitution is when hydrogen is replaced by deuterium. This is known as a deuterium effect and is expressed by the ratio kH/kD (as explained above). Normal KIEs for the deuterium effect