Which amino acid can be found in proteins in both its protonated and unprotonated forms?
A) alanine
B) glycine
C) histidine
D) phenylalanine
C
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Which lettered point is most clearly on a spur or ridge running down the side of a hill?
The question is based on this contour line map with elevations shown in feet.
• North is to the top of the map.
• Streams are shown with dashed lines.
• A graphic scale for measuring horizontal distances is shown below the map.
• Estimate elevations between contour lines to the nearest half-contour interval; assume that the top of a
hill is one-half-contour interval higher than the highest contour line shown.
What will be an ideal response?
Direct proof of continental drift was made possible with measurements of _____ with _____.
A ) altitude, lasers B ) location, sextants and chronographs C ) location, global positioning systems [GPS] D ) altitude, global positioning systems [GPS]
Identify the list that consists of ten common minerals ranked in order of increasing hardness, from 1 to 10.
A. bowen's reaction series B. breakage chart C. mohs hardness scale D. specific gravity scale
What is the flash point of gasoline?
a. 10°F (-12°C) b. -43°F (-41°C) c. 23°F (-5°C) d. -23°F (-30°C)