Which of the following represents a synthesis reaction?
A. A + B ? AB
B. AB ? A + B
C. AB + XY ? AY + XB
D. AB + XY ? AY + XB
Answer: A
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Refer to the figure above. What is the function of the AGU on the loop of the tRNA?
A) It attaches to the amino acid. B) It base pairs with a codon of mRNA. C) It stabilizes the tRNA-amino acid complex. D) It is the active site of this ribozyme.
Which symptoms are characteristic of the inflammatory response?
a. pain only b. swelling only c. tenderness and swelling only d. pain and heat only e. pain, swelling, tenderness and heat
Scientists can compare the relationships between all modern species by examining a gene that performs a similar function in species from all kingdoms. What does this one gene encode?
A) Taq polymerase B) ribosomal RNA C) enzymes needed for photosynthesis D) restriction enzymes
What is the state of stomata in CAM plants, such as cacti?
a. They are nearly always open. b. They are open during the day and are closed during the night. c. They are almost never open. d. They are open during the night and are closed during the day