Which structure "unzips" the double helix of DNA during transcription?
A. an anticodon
B. mRNA
C. IRNA
D. RNA polymerase
Ans: D. RNA polymerase
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A density-dependent factor is an example of a negative feedback system
____________________ Indicate whether the statement is true or false.
All the following are true of B vitamins EXCEPT
a. they are water soluble. b. they serve as coenzymes. c. they can be lost during food processing and preparation. d. they are stored in adipose tissue.
Which statement regarding the scientific method is FALSE?
(a). Experimental results are reported in scientific journals. (b). Hypotheses are finally proven as absolutely true or false. (c). The control is not subjected to the experimental variable. (d). Statistical tests may be used to analyze experimental results. (e). Experimental results are often summarized in a graph or table.
Endospores survive a variety of harsh conditions in part because of the presence of
A. mycolic acid. B. lipopolysaccharide. C. hopanoids. D. dipicolinic acid. E. glycoproteins.