1. is used to synthesize vitamin d when human skin is exposed to uv radiation. a. calcitriol b. tocopherol c. cholesterol d. melanin e. cortisol

Explain the difference between the james-lange and the cannon-bard theories of emotion. answer - the cannon-bard theory proposes that emotions and arousal occur at the same time. the james-lange theory proposes the emotion is the result of arousal. schachter and singer's two-factor model proposes that arousal and cognition combine to create emotion.

If a viral host cell has a mutation that interferes with the addition of carbohydrates to proteins in the golgi, which of the following could likely result? a) the viral envelope proteins would not be glycosylated and might not arrive at the host plasma membrane.b) the viral capsid proteins would not be glycosylated and might not arrive at the host plasma membrane.c) the viral core proteins would not be glycosylated and might not arrive at the host plasma membrane.d) the virus would be unable to reproduce within the host cell

You isolate an infectious substance capable of causing disease in plants, but you do not know whether the infectious agent is a bacterium, virus, viroid, or prion. you have four methods at your disposal to analyze the substance and determine the nature of the infectious agent.i. treat the substance with enzymes that destroy all nucleic acids and then determine whether the substance is still infectious.ii. microscope.iii. culture the substance on nutritive medium, away from any plant cells.iv. treat the sample with proteases that digest all proteins and then determining whether the substance is still infectious.if you already know that the infectious agent was either bacterial or viral, which method(s) listed above would allow you to distinguish between these two possibilities? a) ib) iic) ii or iiid) iv