Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere. The substance which brought these molecules together to interact is
A. acids.
B. buffers.
C. salts.
D. hydrogen.
E. water.
Answer: E
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In an enzyme-catalyzed reaction, the reactant is called the
A. coenzyme B. catalyst C. substrate D. product
The three nucleotide sequence on mRNA is called an anticodon.
Answer the following statement true (T) or false (F)
Which one of the following statements about diplomonads and parabasilids is false?
A. Some members are parasitic, but some also engage in mutualism. B. Both groups are flagellated protists. C. Absence of mitochondria in these groups is an ancestral trait. D. Diplomonads and parabasilids belong to different clades
One strategy used by dissimilatory metal-reducing bacteria that enable their use of insoluble compounds as electron acceptors is to localize cytochromes in the outer membrane, rather than the plasma membrane. This enables the direct transfer of electrons from cytochromes to the extracellular metal.
Answer the following statement true (T) or false (F)