The RNA world proposal suggests that the first information molecules were ____
a. transfer RNA
b. ribosomes
c. messenger RNA
d. ribozymes
e. unpaired strands of DNA
ANSWER: d
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How do carbohydrates contain and/or display information for cells?
A) Carbohydrates store information in the nucleus. B) Carbohydrates contain and display information at the cell surface. C) Carbohydrates display information used by mitochondria to bond to substrates and catalyze reactions. D) Carbohydrates have no role in containing or displaying information for cells.
Which of the primary taste sensations is
triggered by alkaloids?
a. sweet b. salty c. sour d. bitter e. umami
Which group includes all of the other groups?
a. domain b. order c. family d. genus e. species
Which of the following statements is an accurate combination of postulates 3 and 4 of natural selection?
A. Individuals experience no success in their ability to survive or reproduce. B. Individuals experience differential success in their ability to survive or reproduce. C. Individuals experience uniform success in their ability to survive or reproduce. D. Individuals experience unlimited success in their ability to survive or reproduce.