DNA ligase is an enzyme used when making recombinant DNA molecules in the lab. In what normal cellular process is DNA ligase involved?
(a) none, it is only found in virally infected cells
(b) transcription
(c) transformation
(d) DNA replication
(d)
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Predict what type of transport protein is responsible for the movement of amino acids from lysosomes to the cytosol
A. a pump protein B. a channel C. a symporter that couples the movement of amino acids with the movement of protons D. an antiporter that couples the movement of amino acids with the movement of protons
Purines and pyrimidines are components in the building block units of all ________.
A. nucleic acids B. enzymes C. polysaccharides D. amino acids E. carbohydrates
In which type of vessel might you find a valve to assist blood flow?
a. artery
b. arteriole c. capillary d. venule e. vein
Artificial electrical stimulation of a human's menthol-sensitive neurons would likely produce the sensation of _____
A) cold temperature B) hot temperature C) odor of pepper D) deep pressure