Which structure "unzips" the double helix of DNA during transcription?

A. an anticodon
B. mRNA
C. IRNA
D. RNA polymerase


Ans: D. RNA polymerase

Biology & Microbiology

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A density-dependent factor is an example of a negative feedback system

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology