How does the DNA molecule control the appearance and function of a cell?
The DNA molecule controls the synthesis of enzymes and structural proteins. By controlling the synthesis of structural proteins, the DNA is able to influence the physical appearance of a cell. By controlling the production of enzymes, the DNA is able to control all aspects of cellular metabolism and thus control the activity and biological functions of the cell.
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Which center bears the primary responsibility for generating the respiratory rhythm, but is influenced by several other centers?
A) PRG B) VRG C) DRG D) SRG
Recently Alex's family noticed that he is craving salt to the point where he uses it excessively on his food. He also has a need to consume strange substances such as clay and burnt match tips. What might be the cause of this strange behavior?
What will be an ideal response?
Which bone is roughly as wide as it is long and has a concave smooth surface on one side and convex smooth articular surface on the other?
A) Talus B) Tibia C) Ulna D) Ilium
An increase in extracellular calcium generally increases
A. the heart rate. B. the force of contraction. C. autonomic stimulation of the heart. D. sodium channel opening. E. the frequency of the action potentials.