#Question id: 56
#XL - Q Biochemistry
Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?
#Question id: 57
#XL - Q Biochemistry
A(n) ________ has charge but negligible mass, whereas a(n) ________ has mass but no charge.
#Question id: 58
#XL - Q Biochemistry
A covalent chemical bond is one in which ________.
#Question id: 59
#XL - Q Biochemistry
Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?
#Question id: 61
#XL - Q Biochemistry
Which of the following correctly describes chemical equilibrium?
#Question id: 78
#XL - T Zoology
Which is true about naturally occurring monosaccharides?