What kind of enzyme attaches a chain of proteins to other proteins that have been targeted for degradation, thus ensuring their destruction in a proteasome?

a) ubiquitin duplicitase
b) ubiquitinase
c) protease
d) ubiquitin ligase


Ans: d) ubiquitin ligase

Biology & Microbiology

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Which of the following has a complex sort of sexual

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Which of the following characteristics is NOT

present in all animal phyla? a. multicellularity b. organ systems c. heterotrophy d. diploidy e. sexual reproduction

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You have been given a sample of Mimivirus, which has the largest capsid diameter of all currently known viruses (600 nm) and has the form of a 20-sided polyhedron (an icosahedron)

Based on your knowledge of microscopes, what would you be able to see/determine about mimiviral structure using each of the following microscopes? a. simple compound (light) microscope b. fluorescent microscope using fluorescently labeled antibodies to a novel capsid protein c. scanning electron microscope What will be an ideal response?

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Liverworts, hornworts, and mosses are grouped together as the Bryophytes. Besides not having vascular tissue, what do they all have in common?

A) They are all wind pollinated. B) They are heterosporous. C) They can reproduce asexually by producing gemmae. D) They require water for reproduction.

Biology & Microbiology