When producing a karyotype, the pairs of chromosomes ____

a. are arranged largest to smallest
b. are arranged in alphabetical order
c. are arranged with the X and Y first
d. are aligned horizontally by their centromeres
e. are arranged randomly


ANSWER: d

Biology & Microbiology

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True or false: Amino acids can be spontaneously generated in vitro, but only under anaerobic conditions

A. true B. false

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The ________ experiments use an initial exposure to a radioactive compound in the mRNA followed by monitoring of the radioactive compound to determine its fate in the cell.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Step 2 in the accompanying figure is accomplished by an influx of:


a. Ca2+
b. Na2+
c. K+
d. Na2+
e. K+

Biology & Microbiology

Which of the following diseases make up chronic obstructive pulmonary disease (COPD)?

Select one: a. emphysema, chronic bronchitis, and asthma b. emphysema, tuberculosis, and cystic fibrosis c. chronic bronchitis, tuberculosis, and pulmonary fibrosis d. tuberculosis, cystic fibrosis, and asthma e. pulmonary fibrosis, asthma, and cystic fibrosis

Biology & Microbiology