The reading frame for translation is established by ____
a. removal of the cap from mRNA
b. pairing of initiator tRNA with the start codon
c. the first base in the mRNA molecule
d. the ribosome binding site
e. the poly(A) tail
ANSWER: b
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Trisomy 8 usually leads to early miscarriage of a fetus. However, adult individuals have been found with cells that have three copies of chromosome 8 in them. How can this be?
A. The trisomic 8 adults likely have a mosaic region with trisomy 8 B. The trisomic cells underwent complete nondisjunction. C. The trisomic cells underwent a meiotic nondisjunction. D. This individual must be triploid.
A total of ______ codons code for ______ commonly occurring amino acids.
a. 20; 64 b. 64; 20 c. 4; 20 d. 20; 4
List and describe some of the major areas of biotechnology.
What will be an ideal response?
An antigenic ________ occurs when genome segments from different influenza strains recombine.
Fill in the blank(s) with the appropriate word(s).