Which of the following hold the bones of
synovial joints in place?
a. tendons
b. loose connective tissue
c. ligaments
d. cartilage
e. other bones
C
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Unique features of the planctomycetes include ________.
A. a membrane-bound nuclear region B. resistance to ionizing radiation C. their size: some are as large as protozoa D. twitching fimbriae that are required for motility
Which of the following is true of the leucine-zipper structural motif?
A. It contains several evenly spaced leucine residues that make specific DNA contacts. B. It is made up of a single alpha-helix. C. It is often used to mediate protein-protein interactions. D. It is only found in bacterial proteins.
Hominids are characterized by
a. further expansion and elaboration of the brain. b. bipedalism. c. omnivorous feeding behavior. d. further expansion and elaboration of the brain and bipedalism. e. further expansion and elaboration of the brain, bipedalism, and omnivorous feeding behavior.
Retroviruses have all of the following characteristics except ________.
A. a DNA genome B. glycoprotein spikes C. integration into the host genome D. an envelope E. reverse transcriptase