A functional open reading frame (ORF) is defined by the presence of following elements EXCEPT
A) promoter sequence upstream of the ribosome binding site.
B) start codon.
C) stop codon.
D) operator sequence that is regulated by a repressor protein.
E) ribosome binding site upstream of the start codon.
Ans: D) operator sequence that is regulated by a repressor protein.
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Which type of survivorship curve can be depicted as a straight line (where mortality rates are roughly equivalent at all life stages)?
A. Type I B. Type II C. Type III
The structure labeled "E" in this figure of a replication fork represents ____
a. single-stranded binding protein b. primase c. DNA ligase d. helicase e. DNA polymerase
The functional group -NH2 is called the ________ group.
A) methyl B) alcohol C) amino D) carboxyl
In ________ immunity, an individual makes their own antibodies in response to antigen exposure, whereas in ________ immunity, an individual receives antibodies made by another individual(s).
A. passive; active B. natural; artificial C. active; passive D. natural; active E. artificial; active