In bacteria, a unique RNA that binds the A site of the ribosome and directs the addition of approximately 12 amino acids to the nascent peptide when no stop codon is present is called the ________.
Fill in the blank(s) with the appropriate word(s).
tmRNA (transfer messenger RNA)
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In meiosis of oogenesis, how many mature eggs result?
a. one b. two c. three d. four e. five
Describe the route of water through a sponge.
A. enters through pores into the spongocoel and exits via the osculum. B. enters through the osculum into the spongocoel and exits via pores. C. enters through the spongocoel into the osculum and exits via pores. D. enters through the pores into the osculum and exits via the spongocoel. E. enters through the osculum into the mesohyl and exits via the spongocoel.
A point mutation changes a codon from UCG to UAG. What will happen to the resulting polypeptide?
What will be an ideal response?
Which of the following statements about hydrogen bonding is incorrect?
a) hydrogen bonding occurs only between water molecules b) the structure of a large, complex molecule can be influenced by hydrogen bonding. c) hydrogen bonds are easily broken d) hydrogen bonding can occur between different molecules or within the same molecule