During recombination in E. coli, ________ recognize(s) regions of sequence similarity and promote(s) strand invasion, while ________ bind(s) to a Holliday junction promoting strand migration.

#Question id: 4114

#Unit 3. Fundamental Processes

Splice-site recognition is prone to two kinds of errors. First, splice sites can be skipped, with components bound at, for example, a given 5’ splice site pairing with those at a 3’ site beyond the correct one. Ways in which the accuracy of splice-site selection can be enhanced are as

A. The factors that recognize that site are transferred from the polymerase carboxy-terminal “tail” onto the RNA. Once in place, the 5’ splice site components are poised to interact with those other factors that bind to the next 3’ splice site to be synthesized.

B. SR (serine–arginine-rich) proteins bind to sequences called exonic splicing enhancers (ESEs) within the exons. SR proteins bound to these sites recruit the splicing machinery to the nearby splice sites to ensure correct splicing

C. By recruiting splicing factors to each side of a given exon, this process encourages the so-called “exon definition, contribute to correct splicing

D. Alternative splicing is intentional missplicing mechanism

Which of the following is INCORRECT?

#Question id: 11617

#Unit 8. Inheritance Biology

Individuals with a particular genotype that express the phenotype expected of that genotype, this is known as

#Question id: 4319

#Unit 3. Fundamental Processes

Why are BRCA1 and BRCA2 considered to be tumor-suppressor genes?

#Question id: 15523

#Unit 4. Cell Communication and Cell Signaling

#Question id: 23408

#Unit 1. Molecules and their Interaction Relevant to Biology