Use this information to answer the next four questions. Inv…

Use this information to answer the next four questions. Investigators determined the effects of noise stress on heart rate.  Rats (n=6) were prepared with indwelling arterial catheters so that heart rate could be monitored.  Average heart rate for a 10 minute period was recorded for each rat under quiet conditions.  The rats were then exposed to continuous loud noise and the average heart rate was again recorded for 10 minutes. The data are presented below.   Group 1: Quiet Heart Rate (beats per minute) Group 2: Noise Heart Rate (beats per minutes) Rat 1 385 450 Rat 2 360 440 Rat 3 375 460 Rat 4 350 400 Rat 5 400 480 Rat 6 370 430

Use the following information for the next six questions.  …

Use the following information for the next six questions.   Virus’ are known to take over a cell by inserting viral genetic material, a process known as “virulence”. You are studying a new type of flu virus and want to understand if it infects cells using the standard method of inserting virulent DNA or if it infects cells by inserting viral RNA or protein. To determine virulence of the virus you inject mice with the virus and note if the mice survive or die. To determine whether the destructive agent in the virus is protein, DNA, or RNA, you will treat the virus with enzymes that destroy each of the three molecules. You use a protease enzyme to destroy protein, a DNase enzyme to destroy DNA, and an RNase enzyme to destroy RNA in the virus. You then inject the treated virus into the mice to determine if the virus still works by noting if the mice survive or die. The chart indicates the effect on the mice under the various conditions. (A non-virulent strain is a strain that can’t infect another cell. Think of it like an empty syringe.)   Virus Strain Injected Enzymes added Non-virulent cell colony Unknown Virus Known Virus None Survived Died Died Protease Survived Died Died RNase Survived Survived Died DNase Survived Died Survived