In cerebrospinal fluid the concentration of ___ is higher and the concentration of ___ is lower than in plasma.

A. K+, H+
B. H+, K+
C. Na+, Cl-
D. Cl-, Na+


Ans: B. H+, K+

Biology & Microbiology

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Lysis of marine algae and cyanobacteria releases the major osmoregulatory solute, dimethylsulfoniopropionate (DMSP), which is degraded into the most abundant organic S compound in nature, ________

A) dimethyl sulfide (CH3-S-CH3) B) hydrogen sulfide (H2S) C) gypsum (CaSO4) D) elemental sulfur (So)

Biology & Microbiology

Prions are easily destroyed by common sterilization procedures

Indicate whether this statement is true or false.

Biology & Microbiology

Attributes of Welwitschia mirabilis include

_____ It has only two leaves. _____ It obtains most of its water from seasonal heavy rains. _____ It lives under desert conditions. _____ It is a gnetophyte. _____ Its stems are photosynthetic, but its leaves are not.

Biology & Microbiology

The pH of an aqueous solution is an indication of the concentration of available protons. However, you should not expect to find lone protons in solution; rather, the proton is added to a water molecule to form a(n) ______________ ion

(a) hydroxide (b) ammonium (c) chloride (d) hydronium

Biology & Microbiology