Of the following molecules, which passes through a lipid bilayer most readily?
A. carbon dioxide
B. glucose
C. K+
D. arginine
E. RNA
A. carbon dioxide
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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+
A gene can now be defined as:
a. a DNA sequence that carries information to produce a specific RNA or protein product. b. a DNA nucleotide sequence that carries information to produce a specific polypeptide. c. a DNA or RNA sequence that carries information to produce a single polypeptide. d. a DNA nucleotide sequence that carries information to produce an enzyme. e. a DNA or RNA sequence that carries information to produce a specific polypeptide.
in all autotrophic eukaryotes( plants & algae)
1.photosynthesis occurs
How long are MOST bacteria?
a) 0.2 to 2 ?m b) 1 to 4 ?m c) 2 to 8 ?m d) 5 to 15 ?m