Prokaryotic cells lack:
A) DNA. B) ribosomes.
C) internal compartmentalization. D) proteins.
Answer: C
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During the acute inflammatory response, ________ binds to receptors on the capillary wall to open junctions between the cells that allow fluid and leukocytes to enter the tissue.
Fill in the blank(s) with the appropriate word(s).
Based on the figure from the section on HIV replication, why could researchers use PCR to amplify viral DNA from the chimp Marilyn's tissues?
A. PCR can amplify any genetic material.
B. HIV uses DNA as its genetic material.
C. PCR uses a reverse transcriptase and can thus detect RNA.
D. HIV is converted to DNA and integrated into a cell's chromosome.
E. Some of the HIV will be stuck to the outside of a cell.
Which lobe of the cerebrum is a processing center for speech?
a. parietal b. occipital c. temporal d. frontal e. ganglional
Sperm-carrying fluid from the human male is
A. called semen. B. released on a twenty-eight-day cycle (approximately). C. stored in the urinary bladder. D. described by two of these answers.