Newborn screening using mass spectrometry identifies certain single-gene disorders by detecting
A) the causative mutation.
B) the wild type gene sequence.
C) an unusual metabolite or metabolic imbalance.
D) abnormal proteins in urine.
C) an unusual metabolite or metabolic imbalance.
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The only group of oxygenic phototrophic bacteria are the
A) green nonsulfur bacteria. B) Chloroflexi. C) Cyanobacteria. D) Chlorobi.
The primary reservoir for calcium that is released during excitation-contraction coupling in a skeletal muscle fiber is
A. sarcoplasmic reticulum. B. endoplasmic reticulum. C. transverse tubules. D. Golgi bodies. E. troponin.
DNA polymerases used in PCR
A. must remain active at very cold temperatures. B. include Taq polymerases and Vent polymerase. C. use an RNA template to make complementary DNA. D. are labeled with fluorescent dyes.
In garden peas, one pair of alleles controls the height
of the plant, and a second pair of alleles controls flower color. The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a tall plant with white flowers produces 3/8 tall purple, 1/8 tall white, 3/8 dwarf purple, and 1/8 dwarf white. What is the genotype of the parents? What will be an ideal response?