Which of the following statements about the nucleus is NOT true?
A. The nucleus stores the coded instructions for making the cell's proteins
B. The nucleus usually contains a nucleolus region which is where ribosome assembly begins
C. The nucleus us the site of protein assembly
D. The nucleus us surrounded by a nuclear envelope that lets materials in and out
Ans: C. The nucleus us the site of protein assembly
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Extensive growth of the streptococci in a thick bacterial layer on acidic glycoproteins on the teeth is called
A) dental plaque. B) dental caries. C) dental biofilm. D) periodontitis.
Microsatellites and minisatellites are distinguished from each other by the length of each repeating unit
Indicate whether the statement is true or false
Which of these is found in all amino acids?
A. -COOH B. -COH C. -OH D. -NH2 E. Both -COOH and -NH2
Most amphibians are completely dependent on an aquatic environment for ____
a. respiration b. feeding c. reproduction d. movement e. thermoregulation