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TLS Online TPP Program

#Question id: 4529

The “architectural” protein IHF (integration host factor) binds to sites on DNA and bends it., which statement not exist.

#Unit 3. Fundamental Processes

  1. Mechanisms exist to help communication between closely bound proteins.

  2. IHF sites are found between the activator-binding sites and the promoter.

  3. By bending the DNA, IHF helps the DNA-bound activator reach RNA polymerase at the promoter.

  4. This phenomenon known as “action at a distance,”

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TLS Online TPP Program

#Question id: 28802

#Unit 2. Cellular Organization

Listeria is a food-borne pathogen, it move from one host cell to another, and it involves to enable the polymerization of actin by efficiently activating the Arp2/3 complex, how?
TLS Online TPP Program

#Question id: 3325

#Unit 11. Evolution and Behavior

The frequency of the dominant red allele (R) in a population of diploid organisms is equal to the frequency of the recessive white allele (r). The frequency of red individuals assuming Hardy-Weinberg equilibrium is (express the frequency using decimal notation, not as a fraction or a percentage)
TLS Online TPP Program

#Question id: 2861

#Unit 2. Cellular Organization

What is the result of regulatory mutation in given lac operon in merodiploids
TLS Online TPP Program

#Question id: 15150

#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 is made 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 series with recessive mutations in both genes, the F1 progeny shows will have red eye, what is the expected phenotypic ratio of red to white eyed insects in the F2.
TLS Online TPP Program

#Question id: 28561

#Unit 5. Developmental Biology

Which of the following gene is responsible for the synthesis of cAMP?