Which one of the following diagnostic imaging techniques does NOT expose the patient to additional radiation?
A) X- rays and ultrasounds
B) ultrasounds and PET scans
C) ultrasounds and MRI
D) PET scans and MRI
E) PET scans and X-rays
C
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B cell receptors differ from T cell receptors in that
A. B cell receptor immunoglobulins can be secreted as antibodies, whereas T cell receptors are never secreted. B. B cell receptors are immunoglobulin in nature, whereas T cell receptors are not immunoglobulin molecules. C. B cell receptors are comprised of four polypeptides, whereas T cell receptors have only two polypeptides in their quaternary structure. D. B cell receptors have two antigen binding sites, whereas T cell receptors have only one antigen binding site. E. All of the choices represent differences between B cell and T cell receptors.
If you were able to increase the kinetic energy of the molecules inside your body, how would this affect your body temperature?
A. It would increase B. It would remain the same C. It would decrease
In a(n) (hypertonic/isotonic/hypotonic) solution, an animal cell can gain so much water that it may burst.
Fill in the blank(s) with the appropriate word(s).
The chromosomal heredity material is packaged in this organelle in eukaryotic cells but not in prokaryotic cells. This organelle is:
A. mitochondria B. plasma membrane C. centrioles D. chloroplasts E. nucleus