What is an open reading frame?
a. the protein coding sequence in a genome and the associated regulatory sequences
b. the nucleotides between and including a start codon and an end codon in all chromosomes
c. the nucleotides between and including a start codon and an end codon, minus the introns
d. the nucleotides between and including a start codon and an end codon, minus the exons
e. the nucleotides between a start codon and end codon in prokaryotes
B
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Single-celled Paramecium live in pond water (a hypotonic environment). They have a structural feature, a contractile vacuole, which enables them to osmoregulate
If you observed them in the following solutions, at which sucrose concentration (in millimolars, mM) would you expect the contractile vacuole to be most active? A) 0.0 mM sucrose B) 0.05 mM saline C) 0.08 mM sucrose D) 1.0 mM saline
Typically, the first amino acid incorporated in bacterial protein synthesis is ________
Fill in the blank(s) with the appropriate word(s).
Fishing populations to low levels can cause a species to
a. relocate to distant locations. b. migrate out of the area. c. switch their prey items. d. become ecologically extinct. e. increase its reproductive rate.
Which test is used to identify antigens on red blood cells for blood typing?
A. ELISA B. Precipitation C. Western blot D. Agglutination E. Microarrays