In a capsule stain, capsules can be seen as ___________ surrounding the cells.

A. Purple cells walls
B. Pink cell walls
C. Clear halos
D. A dark background


Ans: C. Clear halos

Biology & Microbiology

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Females who are heterozygous for a violence-associated mutation in the X-linked MAOA gene will display abnormal behavior

a. True b. False Indicate whether the statement is true or false

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Which of the following mammalian airway structures acts as the "windpipe"?

a. the bronchus b. the trachea c. the larynx d. the bronchiole e. the pharynx

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Robert Koch's studies on Bacillus anthracis established a sequence of experimental steps to prove that microbes __________.

a. cause disease b. recycle elements such as nitrogen c. produce antiviral compounds d. control insect pests e. can be altered to produce products such as human insulin

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Chemotaxis refers to the ability to

A. move in response to light. B. move in response to a chemical. C. not move in response to a chemical. D. transport desired molecules into cell. E. None of the choices is correct.

Biology & Microbiology