Which of the groups is a carboxyl functional group?
A. -OH
B. C=O
C. COOH
D. NH2
E SH
Answer: C. COOH
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Amino acid sequences evolve through: (choose all that apply)
A. mutation. B. selection. C. adaptation. D. translation.
Structural features that contain the protein actin and help to strengthen and change the shapes of eukaryotic cells are known as ____
a. plastids b. vacuoles c. microvilli d. nucleoli e. microfilaments
What is conservative transposition?
A) No net increase in the number of transposable elements in the genome. B) A net increase in the number of transposable elements in the genome. C) Movement of transposable elements with replication of the element. D) Movement of transposable elements without replication of the element. E) Transposition without disruption of normal gene product activity.
Which of the following is NOT a free-floating photosynthetic organism found in a lake?
A. phytoplankton B. green algae C. zooplankton D. cyanobacteria E. diatom