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TLS Online TPP Program
#Question id: 27075
#Unit 1. Molecules and their Interaction Relevant to Biology
As atom "A" approaches, the electrons of atom "B" will be attracted by the positive end of atom "A". As a result, the electrons of atom "B" will migrate to the left side and make the left side slightly negative. This phenomenon can be explained by
TLS Online TPP Program
#Question id: 16311
#Unit 7. System Physiology – Animal
What is stress?
TLS Online TPP Program
#Question id: 1307
#Unit 4. Cell Communication and Cell Signaling
A defect in which of the following intercellular junctions would allow partially digested material to leak passively between the cells of the small intestine into the abdominal cavity?
TLS Online TPP Program
#Question id: 15154
#Unit 8. Inheritance Biology
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: 33405
#Unit 1. Molecules and their Interaction Relevant to Biology
Which one of the following defines the psi angle in the protein backbone?