A woman pulls a suitcase a distance of 3 m horizontally on a frictionless surface with a force of 15 N at a 50o angle. What work in Joules does she do in pulling the suitcase?

A 0.75 kg ball is attached to a 2 m long string and is twirled in a circle at a constant speed of . What is the centripetal force in N experienced by the key?

Which of the following processes is the best way to determine whether alternative splicing of a given gene occurs?

How does breakdown of glucose inhibit transcription of the lac operon?

Under what conditions does the trp repressor block transcription of the trp operon?

Cytoplasmic determinants are best described as having which of the following characteristics?

Gene expression is often assayed by measuring the level of mRNA produced from a gene. Which of the following levels of the control of gene expression can by analyzed by this type of assay?

In wildtype Drosophila embryos, the bicoid mRNA is localized to the anterior end of the embryo. If bicoid mRNA was injected into the embryo’s posterior end as well, which of the following developmental events would occur?

If the DNA of a mammalian promoter region experiences increased methylation on cytosine (C) which of the following results is most likely to occur?

Which of the following molecules binds with a repressor to alter its conformation and therefore affect its function?