Proteins function in modern cells as ________.
A. both catalysts and structural elements
B. structural elements
C. hereditary information
D. catalysts
Answer: A
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A complex consisting of a single mRNA molecule with several ribosomes is called a
A. multisome. B. proteosome. C. maxisome. D. polysome.
Compound C is a ____________________.
Assume that you are taking an organic chemistry class. Your teacher has given you four organic compounds to analyze. She tells you that one is a carbohydrate, one is a hydrocarbon, one is a nucleic acid, and one is a protein. You discover that Compound C contains only carbon, hydrogen, oxygen, and nitrogen. Of the four types of compounds which were given to you to analyze, which one best describes Compound C?
While in the biology lab, you observe, in both plant and animal cells, that some single cells are splitting into two daughter cells. You also observe that the splitting cells are still connected by a contractile ring and the cytoplasm has started to divide. You conclude these cells are undergoing
A. metaphase. B. mitosis. C. cytokinesis. D. anaphase. E. binary fission.
The earliest human populations lived in
a. tropical rain forests. b. deserts. c. coniferous forests. d. woodlands. e. temperate deciduous forests.