Which type of membrane protein will be used to bind to hormones?
A) channel proteins
B) carrier proteins
C) cell recognition proteins
D) receptor proteins
E) enzymatic proteins
Ans: D) receptor proteins
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The chromatids detach from one another during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
A mutation that changes the amino acid sequence of the resulting protein by substitution is called a ________ mutation.
A. missense B. silent C. nonsense D. None of the choices are correct.
The junction across which electrical signals are passed from a neuron to a muscle fiber, a gland, or another neuron is called the
A) synapse. B) glia. C) soma. D) dendrite. E) axon.
Shivering is used by mammals to increase body heat when the hypothalamus detects a body temperature below the set point. Although the behavior involves muscles, the outcome is not movement but "wasted" energy in the form of heat. This is an example of nature reusing a body structure for an additional purpose.A scout troop sets out on a backpacking trip. Soon, an unexpected storm gets them drenched, and the troop leaders discover that few boys have packed warm clothes. Several scouts start shivering uncontrollably, a sign of hypothermia. The leaders call off the trip and the group heads back to their cars. This shivering response was
A. an attempt to produce heat by burning large amounts of ATP. B. an attempt to produce heat by creating friction with their clothing. C. a social signal that evolved to alert adults to take action. D. a maladaptive response that wastes energy.