The observation that SNPs account for most of the differences in the coding regions between the human and
chimpanzee genomes suggests that ____.
a. the two genomes are too different to suggest an evolutionary relationship
b. Neanderthals descended directly from chimpanzees
c. small changes in amino acid sequences account for big differences in phenotype
d. most of the differences in phenotype are due to DNA sequence changes
e. humans descended directly from chimpanzees
c
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Why might adding inorganic phosphate, to a reaction mixture where glycolysis is rapidly proceeding, help sustain the metabolic pathway?
A) It would increase the amount of glucose available for catabolism. B) It would increase the oxygen supply available for aerobic respiration because each phosphate group contains four oxygen atoms as constituents. C) The metabolic intermediates of glycolysis are phosphorylated. D) It increases the energy level of the electrons that are transferred to the electron transport chain where ATP is produced.
You believe that you have isolated a new strain of positive-sense, single-stranded RNA virus and set about studying it in your laboratory. Which of the following lines of evidence would most strongly support your hypothesis that the virus is a [+]ssRNA?
A) The virions are diploid. B) You sequence the bases in the viral RNA and the mRNA and find them to be antiparallel. C) Introducing a protease inhibitor causes the virus to stop producing proteins and reproducing. D) Introducing a reverse transcriptase inhibitor slows down the growth of the virus.
The receptors to which animal virus attachment proteins usually bind are
A. proteins. B. carbohydrates. C. nucleic acid. D. lipids. E. glycoproteins.
Streptococcus pneumonae can be diferentiated best from the viridans group of streptococci by
A. Bile solubility B. Colonial morphology C. Gram stain D. Hippuricase and ninhydrin