The ________ are enzymes that link amino acids with their appropriate tRNAs
Fill in the blank with correct word.
Answer: aminoacyl-tRNA synthetases
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Of the following, the best conclusion concerning the difference between the S phases for beta and gamma is that _____
A) gamma contains more DNA than beta B) beta and gamma contain the same amount of DNA C) beta cells reproduce asexually D) beta are in the G0 phase E) beta is a plant cell and gamma is an animal cell
Which one of the following happens during repolarization of a neuron?
A) Sodium channels close, and potassium rushes out of the cell to temporarily reestablish the membrane potential. B) Potassium channels close, preventing further loss of positive ions. C) The sodium-potassium pump is turned off. D) Sodium channels open to allow sodium ions to rush back out of the cell. E) The membrane potential is eliminated.
Which of the following is NOT a true statement about organs?
A) An organ represents a higher level of structure than the tissues composing it. B) An organ consists of several tissues. C) An organ can carry out only the functions of its component tissues. D) An organ consists of many cells.
Earth is tilted about how many degrees on its axis?
A. 8 B. 15 C. 23 D. 30 E. 38