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TLS Online TPP Program

#Question id: 19037

In gas chromatography, the basis for separation of the components of the volatile material is the difference in________

#Unit 13. Methods in Biology
  1. Partition coefficients
  2. Conductivity
  3. Molecular weight
  4. Molarity
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TLS Online TPP Program

#Question id: 12240

#Unit 10. Ecological Principles

Two plant species co-occur in a prairie. Species X always occurs near species Y. However, species    often occurs in isolation from species X and produces more seeds when alone than when growing next to species X. Which of the following interactions between species X and Y could generate this pattern?
TLS Online TPP Program

#Question id: 2298

#Unit 2. Cellular Organization

The endoplasmic reticulum and ribosomes are both involved in   
TLS Online TPP Program

#Question id: 11165

#Unit 2. Cellular Organization

Membrane lipids in tissue samples obtained from different parts of a reindeer’s leg have different fatty acid compositions. Membrane lipids from tissue near the hooves contain a larger proportion of unsaturated fatty acids than those from tissue in the upper leg. What is the significance of this observation?
TLS Online TPP Program

#Question id: 277

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement is not true about histones?
TLS Online TPP Program

#Question id: 3824

#Unit 3. Fundamental Processes

State whether the following statements is true/false regarding DNA replication.

1. The polymerization of DNA is essentially irreversible due to the hydrolysis of pyrophosphate.

2. On average about twenty errors are made during each replication of the human genome.

3. DNA polymerase I possesses 5ʹ → 3ʹ exonuclease activity.

4. All DNA ligase enzymes use ATP as a cosubstrate.

5. The purpose of SSB is to prevent single-stranded DNA from folding back on itself to form double-helical regions.