Proteins that are composed of more than one polypeptide chain are said to have ________ structure

A) tertiary B) primary C) quaternary D) secondary


Answer: C

Biology & Microbiology

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Which of the following statements is incorrect concerning sister chromatids?

A. The formation of sister chromatids doubles the amount of DNA in a cell. B. Sister chromatids consist of two identical copies of a single homologue. C. Sister chromatids are held together at the centromere by kinetochore proteins. D. Sister chromatids are formed during the S phase of the cell cycle. E. Sister chromatids separate during telophase.

Biology & Microbiology

Which of the following enzymes is responsible for specifically transcribing tRNA in eukaryotic cells?

A) RNA polymerase I B) RNA polymerase II C) RNA polymerase III D) primase E) RNase H

Biology & Microbiology

What is a difference between Chlamydomonas and Ulva?

a. Only Ulva produce flagellated gametes. b. Only Ulva contains carotenoids. c. Only Ulva grows by mitosis after fertilization. d. Only Ulva contains chlorophyll.

Biology & Microbiology

Lipids with unsaturated fatty acids

a. decrease the fluidity of membranes. b. increase the charge associated with the inner face of a membrane. c. increase the fluidity of membranes. d. are present only on the inner side of the plasma membrane.

Biology & Microbiology