Which of the following statements about components of the flu vaccine and their intended function is true?
A. Gelatin or sorbitol is used to enhance the ability of the immune system to detect the virus.
B. Formaldehyde is used to inactivate toxins from the virus or bacteria that may have been present during production.
C. Antibiotics are used as a preservative in multidose vials of vaccine in order to prolong their shelf life. Antibiotics allow the vaccine to withstand extreme temperature changes.
D. Aluminum is included to prevent the growth of bacteria during vaccine preparation and storage.
Answer: B
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a. gametophyte b. zygote c. sperm d. microspore e. gamete
Restriction enzymes
a. make staggered cuts. b. function only at "sticky ends." c. produce uniform lengths of DNA. d. function only in genetic laboratories. e. are fragments of DNA.
Despite a great deal of variation across the animal kingdom, Hox genes tend to appear along a chromosome or chromosomes in the same order that they are expressed in along the anteroposterior axis of an embryo
This pattern of Hox gene expression is called the ________. [four words] Fill in the blank(s) with correct word
In the absence of calcium, myosin cannot contact actin because of the presence of the ________ covering the myosin binding sites on actin
Fill in the blank(s) with correct word