What feature of cytochromes makes them valuable in electron transport systems?
A) Aspartate residues in the active site.
B) The porphyrin ring.
C) The multiple ?-helices.
D) The iron ion.
D) The iron ion.
You might also like to view...
Which cells display digested viral cell fragments on their surface?
a. dendritic cells b. helper T cells c. cytotoxic T cells d. memory T cells e. B cells
Nucleic acids are polymers made up of which of the following monomers?
A) nucleotides B) sugars C) amino acids D) nitrogenous bases
When studying Drosophila genetics, Morgan found that the haploid chromosome number equals the number of
A) bouquets. B) linkage groups. C) centromeres. D) haploid gametes. E) cohesins.
A cherry blossom has all four sets of modified leaves (sepals, petals, stamens, and carpels), so it is called a __________ flower.
Fill in the blank(s) with the appropriate word(s).