The following pertain to ribosomes during protein synthesis except
A. ribosomes participate only in translation.
B. they contain codons within their rRNA molecules.
C. ribosomes use their large subunit to supply enzymes for peptide bonding.
D. ribosomes shift toward the 3' end of the mRNA strand from one codon to the next.
E. ribosomes bind to the 5' end of mRNA by their small subunit.
Answer: B
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In an XX embryo, ____ inactivation of one X chromosome usually occurs when the embryo has about 32 cells
a. phenotypic b. inhibited c. cascading d. selective e. random
Given what you now know, what information is most likely to produce the correct answer?
What will be an ideal response?
All of the following are diameters of cells that would be resolved in a microscope with a limit of resolution of 0.2 µm except ________.
A. 2.0 µm B. 0.2 mm C. 0.1 µm D. 0.2 µm
In its travel through the human body, blood usually continues on from capillaries to enter
a. arterioles. b. venules. c. arteries. d. veins. e. other capillaries.