Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 49293
TLS Online TPP Program

#Question id: 9195

Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. What does that suggest about the diversity of molluscs in this area?

#SCPH28 | Zoology
  1. The west coast of New Caledonia is not an appropriate habitat for molluscs.
  2. Many of the species from this 20% are probably rare.
  3. They were not sampling uniformly throughout the area.
  4. Many of the species from this 20% are most likely just dispersing through the are
More Questions
TLS Online TPP Program

#Question id: 15216

#SCPH28 | Zoology

There is no SDS in native (Buffer) Gels, but good resolution is achieved due to
TLS Online TPP Program

#Question id: 5084

#SCPH01 Biochemistry

The first cavity formed during frog development is the ________.
TLS Online TPP Program

#Question id: 15154

#SCPH12 I Genetics

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.
Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in parallel with a recessive mutation in one gene and a dominant mutation in the other, determine the phenotype of the F1 progeny and the expected phenotypic ratio of red to white eyed insects in the F2.
TLS Online TPP Program

#Question id: 23247

#SCPH01 Biochemistry

In pyrosequencing which molecule is actually detected?
TLS Online TPP Program

#Question id: 20541

#SCPH28 | Zoology

Why do bacteria oxidize BTEXs and other organic pollutants?