Blog

a. A beam of electrons is sent horizontally down the axis of a tube to strike a fluorescent screen at the end of the tube. On the way, the electrons encounter a magnetic field directed vertically downward. How will the spot on the screen will be deflected? Explain with reasoning. (4 pts) b. An electron is moving at 2.5×106 m/s perpendicular to a 3.5 mT magnetic field. What is the radius of its path?  (e = 1.6×10-19 C, me = 9.1×10-31 kg)  (6 pts)

In a population in Hardy-Weinberg equilibrium, the percentage of individuals exhibiting a recessive disorder is 1%, which is the same as 0.01. What is the frequency of heterozygotes? 

Below is a pedigree involving a human disease that is inherited in a simple Mendelian manner. Which of the following patterns is this pedigree consistent with?

In the method of gene cloning, a fragment of chromosomal DNA is inserted into a vector. During this process, how many covalent bonds are made via DNA ligase? 

Which of the following can cause induced mutations?

When two different genes are homologous, this means

The BLAST program begins with a query sequence and ______________.

A nurse is performing an assessment on a 4 year old patient. Which pain scale would be most appropriate to use?

A nurse is teaching a group of patients about the sleep cycle. Which statement by a patient indicates an understanding of rapid eye movement (REM) sleep?

A nurse is assessing a patient with a history of neuropathic pain. Which statement would support this?