The “Adam’s apple” is located in the ____

a. Glottis
b. Pharynx
c. Trachea
d. Larynx
e. Bronchus


ANSWER: d

Biology & Microbiology

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You want to engineer a eukaryotic gene into bacterial colony and have it expressed. What must be included in addition to the coding exons of the gene?

A) the introns B) eukaryotic polymerases C) a bacterial promoter sequence D) eukaryotic ribosomal subunits E) eukaryotic tRNAs

Biology & Microbiology

A central vacuole

(a) is found only in plant cells. (b) may take up between 50% and 90% of the cell’s interior. (c) regulates water balance. (d) is all of the above.

Biology & Microbiology

Which of the following cell types conducts water most rapidly through a plant?  

A.  parenchyma cells B.  sclerenchyma cells C.  sieve tubes D.  vessel members E.  phloem

Biology & Microbiology

You need to determine if a pure culture of bacteria is gram-positive or gram-negative, but you've just spilled your only solution of crystal violet so you can't do a Gram stain.  You decide to try a lysozyme treatment on a sample of each culture and then examine the samples under the microscope.  The expected result is

A. gram-positives will lyse and appears as debris; gram-negatives will lose cellular morphology and appear as cocci. B. gram-negatives will lyse and appears as debris; gram-positives will be unaffected. C. gram-negatives will lyse and appears as debris; gram-positives will lose cellular morphology and appear as cocci. D. gram-positives will lyse and appears as debris; gram-negatives will lyse but more slowly. E. gram-positives will lyse and appears as debris; gram-negatives will be unaffected.

Biology & Microbiology