Which of the following classes of antibiotics interferes with ribosomes?

Based on colony morphology, antibiotic resistance and hemolytic pattern, the circled organism pictured is likely:  

A 27-year-old woman in her 30th week of pregnancy presented to the ER because of premature labor. She reported that she hadn’t felt well over the past few days and that it started a couple days after eating a salad with raspberries, walnuts, cranberries and goat cheese.   Cultures from the amniotic fluid and placenta revealed smooth round colonies with a narrow zone of beta-hemolysis on the BAP. Which test should be performed to identify the organism based on the patient presentation and morphology? 

1. An important cause of acute exudative pharyngitis is: 

It’s your first day working in the microbiology lab as a research assistant. You are instructed to use moist heat to sterilize media that will be used to culture bacteria. In order to eliminate all organisms and endospores, which autoclave settings should you use?

Two packages are connected by a very light string that goes over an ideal pulley as shown in the figure. Package A has a mass of 3.0 kg and can slide along a rough plane inclined at 30° above the horizontal. The string acts on package A parallel to the surface of the plane. The coefficient of static friction between package A and the plane is 0.40. What minimum mass should package B have in order to start package A sliding up the ramp? (Write your answer only in numbers – no units)

A 40-kg crate is being lowered with a downward acceleration is 2.0 m/s2 by means of a rope. (a) What is the magnitude of the force exerted by the rope on the crate? (b) What would be the magnitude of the force exerted by the rope if the crate were being raised with an acceleration of 2.0 m/s2?

A ball is thrown downward from the top of a building with an initial speed of 25 m/s.  It strikes the ground after 2.0 s.  How high is the building, assuming negligible air resistance?

A cart moves up a inclined frictionless track. Which of the following statements is correct?

The metric pre-fix for one-thousandth is