Which of the following statements about the proteasome is false?
(a) Ubiquitin is a small protein that is covalently attached to proteins to mark them for delivery to the proteasome.
(b) Proteases reside in the central cylinder of a proteasome.
(c) Misfolded proteins are delivered to the proteasome, where they are sequestered from the cytoplasm and can attempt to refold.
(d) The protein stoppers that surround the central cylinder of the proteasome use the energy from ATP hydrolysis to move proteins into the proteasome inner chamber.
(c) Once proteins are sent to the proteasome, proteases degrade them. Chaperone proteins provide a place for misfolded proteins to attempt to refold.
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The following represents a portion of one half of a DNA strand: ATTCG. What would be the
complementary sequence to this?
a. ATTCG b. TAAGC c. AUUCG d. UAAGC
Which statement about radiolarians is FALSE?
a. They are rhizarians. b. They have axopods. c. They are actinopods. d. They lack silica shells. e. They have algal endosymbionts
Nearly all food plants are ________
A) bryophytes B) gymnosperms C) ferns D) angiosperms
Which of the following is not one of the stages of HIV infection?
A. flat or raised lesions on the penis or vulva B. opportunistic infections C. a CD4 + T cell count between 200 and 499 per microliter of blood D. a greater than 500 CD4 + T cells per microliter of blood E. a CD4 + T cell count below 200 per microliter of blood