Food is prevented from entering the trachea by the

A. glottis.
B. epiglottis.
C. pharynx.
D. larynx.
E. sphincter muscle.


Answer: B

Biology & Microbiology

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One reason the field of proteomics is continually evolving following the systematic study of an organism's genome is because

A. it became apparent that while the organism's genome is relatively stable, protein expression in an organism is constantly changing. B. once the genome had been sequenced, all protein expression was understood. C. the expression of proteins is fixed in each organism so sequencing the genome is essential to understanding phenotypes. D. it became apparent that protein expression is relatively uniform, whereas the genome is constantly changing.

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Enzymes are _________________

A. highly specific B. most active at 0oC C. most active at 65oC D. multipurposeâ€"one enzyme catalyzes multiple pathways E. polysaccharides

Biology & Microbiology

The Miller experiment succeeded in creating ____________

Fill in the blank(s) with correct word

Biology & Microbiology

Each DNA strand has a backbone that consists

of alternating a. covalent and ionic bonds. b. nitrogen-containing bases. c. hydrogen bonds. d. sugar and phosphate molecules. e. covalent and hydrogen bonds.

Biology & Microbiology