The “Adam’s apple” is located in the ____
a. Glottis
b. Pharynx
c. Trachea
d. Larynx
e. Bronchus
ANSWER: d
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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
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.
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
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.