Which cellular structure is important in classifying a bacterial species as Gram positive or Gram negative?
a. flagella
b. cell wall
c. cilia
d. glycocalyx
Ans: b. cell wall
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The ____ regulates the movement of molecules in and out of the cell
a. nucleus b. cytoplasm c. cystol d. plasma membrane e. DNA
Which of the following is NOT a risk factor for lung cancer?
a. smoking b. asbestos exposure c. radiation d. exposure to industrial chemicals e. regular exercise
You work for a pharmaceutical company that designs small RNAs, used to control expression of disease genes. The primary focus area of your research should be
A. translational repression. B. transcriptional repression. C. transcriptional activation. D. translational activation.
Any substance that triggers an immune response in the body is called a(n) ________
A) memory cell B) MHC marker C) complement D) antigen