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1. You clone a double stranded DNA fragment from a pathogenic fungal stain. You suspect that the fragment contains a gene encoding a Seven Amino Acid Peptide. Here’s one of the DNA strand fragments: 5′ T G A G A T G C T T A G C T G […]

lex A is an E. coli gene whose product regulates the transcription of certain target genes that are located at different positions in the bacterial chromosome. Identified target genes appear to be involved in DNA repair and recombination. Under normal conditions, the LexA protein binds near and represses transcription of target genes; however, when […]

1. Describe the general sequence of events in neuromuscular transmission at the neuromuscular junction. 2. What evidence supports a sliding filament-crossbridge mechanism of contraction in smooth muscle? 3. Present the comparison of neuromuscular blocking drugs and local anesthetics. What is a rationale to use them for pain control? How they […]

We now know that the gene for flower color and the gene for seed color are both on chromosome 1 of the pea plants once studied by Mendel. According to Mendel’s results, flower color and seed color undergo independent assortment. Which of the following explanations is most likely?Answer a. During […]