The two arms that bind to antigen

A. Fab
B. Fc
C. Hinge region
D. Complement binding site
E. Disulfide bonds


A. Fab

Biology & Microbiology

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Elementary bodies of chlamydiae are specialized for reproduction rather than infection.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Match the axoneme structure with its characteristic.

A) incomplete microtubule B) project inward at each doublet C) slide microtubules past one another D) links adjacent doublets E) complete microtubule 1) A tubule 2) B tubule 3) sidearms 4) radial spokes 5) nexin

Biology & Microbiology

How can humans perceive multiple sounds at once?

a. Each portion of the basilar membrane vibrates at a unique frequency, and multiple regions can be stimulated at the same time. b. The more frequencies of sounds that are present, the further the sound travels into the cochlea. c. We have two ears, each perceiving a subset of frequencies in the environment. d. The fluid in the middle ear can transmit multiple frequencies to the oval window. e. Sounds reaching the left or right ear result in different nerve impulses.

Biology & Microbiology

Which of the following is true of the plasma membrane?

A) It is a rigid, nonchanging structure. B) Its capabilities are primarily determined by carbohydrates in the membrane. C) It controls the passage of substances into and out of the cell. D) It only allows hydrophilic materials to pass through.

Biology & Microbiology