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.

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

Flatworms are most closely related to the ________.

A. annelids B. roundworms C. sponges D. cnidarians

Biology & Microbiology

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.

Biology & Microbiology