A pigment synthesized from vitamin A is
A) retinal.
B) opsin.
C) rhodopsin.
D) transducin.
E) cGMP.
Answer: A
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As you are cooking, you accidentally touch the burner of the stove. You jerk your hand away by contracting muscles in your arm to pull your forearm toward the arm. This movement is flexion.
Answer the following statement true (T) or false (F)
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a) C b) D c) E d) M e) L
A(n) ________ is a group of atoms that determines many of the properties of an organic molecule
A) functional group B) phosphate group C) amino group D) carboxyl group E) hydroxyl group