Which of the following environments is thought to have promoted the dehydration synthesis of polypeptides and other macromolecules from smaller organic monomers on a prebiotic Earth?
A) freshwater swamps and marshes
B) deep-sea hydrothermal vents
C) hot sand, clay, or rock along the seashore
D) sediments at the bottom of the world's oceans
Answer: C
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A) pro-P B) met-M C) glu-E D) phe-F E) arg-A
What symptoms are shared by knockout mice with nonfunctional Dvl genes and humans with certain
psychiatric disorders?
What will be an ideal response?Photoperiodism is the ____
a. duration of flowering in a plant b. amount of light needed by a plant to exhibit normal growth c. response of a plant to the duration of light and darkness d. light phase of photosynthesis during which photolysis of water occurs e. opposite of photorespiration
In prokaryotes, most of the control of gene
expression is at the ____ level. a. transcriptional b. transcript processing c. transport d. translational e. post-translational