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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

Any substance that triggers an immune response in the body is called a(n) ________

A) memory cell B) MHC marker C) complement D) antigen

Biology & Microbiology