During the termination stage ___________.
A. a start codon enters the ribosome
B. release factors separate the ribosomal subunits
C. mRNA attaches to the ribosome and the polypeptide chain
D. ribosomal subunits join
E. a stop codon enters the ribosome
Answer: E
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Which protozoan parasite can invade the intestinal wall using a protease enzyme that not only breaks down the wall tissue but also cleave IgA, IgG, and complement components?
A. Cryptosporidium parvum B. Giardia intestinalis C. Cyclospora cayetanensis D. Entamoeba histolytica
In order for DNA molecules to undergo recombination, ____
a. they must be from the same species b. their strands must separate as in replication c. they must be cut and spliced at specific nucleotide sequences d. one of the two DNA strands must be degraded e. they must first be transcribed
In humans, and some other vertebrates, the organ that collects sound is called the ____
a. auditory nerve
b. cochlea c. eardrum d. pinna e. round window
A layer of host cell membrane attached to a virus is called:
a. An envelope b. A protein coat c. A capsomere d. A capsid e. A plasmid