Spikes are specialized receptors that allow ____ to attach to host tissues
Fill in the blank(s) with the appropriate word(s).
viruses
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PCR produces
A. DNA fragments of all possible sizes. B. DNA fragments that are one nucleotide larger than the next fragment. C. DNA fragments of a particular size. D. DNA fragments of increasing size. E. DNA fragments that are one nucleotide larger than the next fragment AND DNA fragments of increasing size.
How does sickle cell anemia reduce the blood’s ability to deliver oxygen to tissues?
a. The plasma membrane is too thick to allow oxygen to diffuse into sickle-shaped red blood cells. b. Sickle-shaped red blood cells puncture normal red blood cells, causing them to rupture and lose hemoglobin. c. Deformed red blood cells clog capillaries, preventing other red blood cells from passing through. d. Sickle cells contain a mutated form of hemoglobin that binds to half as many oxygen molecules.
Inflammation of the liver with necrosis of the hepatocytes and swelling due to a mononuclear response is a disease called ________.
A. mononucleosis B. jaundice C. hepatitis D. cirrhosis
Which of the following pairs shares a similar function?
A) adhesive junction–tight junction B) desmotubule–gap junction C) tight junction–gap junction D) plaque–plasmodesma E) connexon–desmosome