How are integral proteins unique in cell membranes?
a. They have no hydrophobic portions.
b. They are weakly bound to the surface of the membrane.
c. They are only located on the inner side of a membrane.
d. They are firmly bound to the membrane and can only be released with a detergent.
e. They are completely embedded within the lipid bilayer with no exposure to the internal cell environment
d
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Which of the following is an example of a pluripotent cell?
A. embryonic stem cells B. red blood cells C. fetal heart cells D. umbilical cord blood E. nerve cells
The phases of each PCR cycle listed in order are ____
a. denaturation, extension, and annealing b. annealing, extension, and denaturation c. extension, denaturation, and annealing d. annealing, denaturation, and extension e. denaturation, annealing, and extension
Since all land-dwelling animals utilize oxygen for respiration, does that make oxygen a limiting
factor?
What will be an ideal response?The phylogenetic analysis of nucleotide sequences for a group of retroviruses has allowed researchers to discover that
there are _____ major types of HIV that originate from one ancestral lentivirus. a. one b. two c. four d. ten e. fourteen