Proteins must have more than one _______ to have a quaternary structure.

a. alpha helix
b. beta pleated sheet
c. polypeptide chain
d. transmembrane segment


Ans: c. polypeptide chain

Biology & Microbiology

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Which sequence of events is most CORRECT for the initiation and elongation steps of translation?

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Biology & Microbiology

Which of the following is a characteristic of most eudicots?

a. Trisulcate pollen b. Scattered vascular tissue c. Parallel veins in leaves d. One cotyledon

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The primary function of DNA ligase is to

a. cut the two strands of DNA molecule prior to replication. b. attach free nucleotides to a growing chain. c. remove bases that might have been inserted incorrectly. d. seal any tiny gaps in the new DNA. e. fragment old DNA that is no longer of use to the cell.

Biology & Microbiology

Your statement, "If taken at the beginning of a cold, Echinacea will reduce cold symptoms," is called a(n) ________

A) observation B) hypothesis C) conclusion D) theory

Biology & Microbiology