Light reaches organisms in the _______, where microscopic ______ and multicellular algae provide food for the animal community.
Fill in the blank(s) with the appropriate word(s).
Answer:
a. Photic zone
b. phytoplankton
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DNA-binding transactivators are:
A. necessary only for initiation of transcription of housekeeping genes. B. factors that bind to other proteins, not to DNA directly. C. factors that complex directly with RNA Pol II to form a preinitiation complex. D. factors that bind to enhancers.
Which statement correctly describes DNA base pairing?
a. Two hydrogen bonds bind A and T; three hydrogen bonds bind G and C. b. Two hydrogen bonds bind A and C; three hydrogen bonds bind T and G. c. Two hydrogen bonds bind G and C; three hydrogen bonds bind A and T. d. Two hydrogen bonds bind A and T, and two hydrogen bonds bind G and C. e. Three hydrogen bonds bind A and C, and three hydrogen bonds bind T and G.
The recommended daily intake for fiber is approximately ——grams.
a. 5 b. 30 c. 100 d. 450
Which of the following antibiotics causes misreading of mRNA?
A) aminoglycoside — changes shape of 30S units B) chloramphenicol — inhibits peptide bonds at 50S subunit C) oxazolidinone — prevents formation of 70S ribosome D) streptogamin — prevents release of peptide from 70S ribosome E) tetracyclines — bind with 30S subunit