Aminoacyl-tRNA synthetases charge tRNA with an amino acid. The charging reaction occurs in two stages. What are the two stages?
What will be an ideal response?
Ans: First the amino acid reacts with ATP to form aminoacyl-adenylate. Second, the activated amino acid is transferred to the tRNA, releasing AMP.
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If this cell is in the middle of meiosis I, the end result of this division would be
____________________.
a. two identical haploid cells b. two haploid cells that are not identical c. two identical diploid cells d. two diploid cells that are not identical
Amino acids are linked onto a polypeptide chain by ribosomes. What carries free amino acids to the ribosomes?
a. mRNA b. tRNA c. microRNAs d. rRNA e. any form of RNA
Flatworms are most closely related to the ________.
A. annelids B. roundworms C. sponges D. cnidarians
A red blood cell will swell and burst when placed in which of the following kinds of solution?
a. hypotonic b. hypertonic c. isotonic d. hydrophobic. e. hyperbaric.