Most antigens are monovalent.
Answer the following statement true (T) or false (F)
False
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The likely number of and locations of transmembrane segments of integral membrane proteins is inferred by
A) X-ray crystallography. B) SDS-PAGE. C) western blot. D) hydropathic analysis. E) affinity labeling.
The key innovation that helped seed-bearing plants
survive in high, dry environments is a. pollen. b. the cuticle. c. xylem. d. phloem. e. lignin.
Methane, which is composed of carbon and hydrogen, lacks functional groups and is a gas at room
temperature. Upon replacing one of the hydrogen atoms with a hydroxyl group, methane is converted to methanol, which is a liquid at room temperature. Explain the reason behind this difference in physical properties.What will be an ideal response?
The most frequently used portal of entry for pathogens is the
A) mucous membranes of the respiratory tract. B) mucous membranes of the gastrointestinal tract. C) skin. D) parenteral route. E) All of these portals are used equally.