In some proteins, an ionic bond may form between an amino acid with
A. a positive R group and an amino acid with a negative R group.
?B. a negative R group and a nonpolar amino acid.
?C. a sulfhydryl group and an amino acid with an amine group.?D. a carboxyl group and an amino acid with a C-terminal.?E. a glycine and another with a tryptophan.
A
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In this view of the olfactory organs, what structure does number 1 indicate?
A. Axon of olfactory receptor cell B. Olfactory receptor C. Olfactory hairs D. Olfactory bulb E. Basal cell
This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. What endocrine glands are indicated by the letters d and e?
A. d = hypothalamus, e = posterior pituitary B. d = thalamus, e = anterior pituitary C. d = hypothalamus, e = anterior pituitary D. d = hypothalamus, e = thyroid gland E. d = thalamus, e = posterior pituitary
The passage of water soluble substances through the plasma membrane is made possible by ____ in the membrane Cholesterol Proteins Glycolipids Phospholipids
What will be an ideal response?
The brain is located in the ________ body cavities
A) dorsal and vertebral B) vertebral and cranial C) ventral and dorsal D) dorsal and cranial