Which of the following is an incorrect pairing?
A. primary structure; amino acid sequence
B. secondary structure; disulfide bridges
C. tertiary structure; covalent bonds
D. quaternary structure; two or more polypeptides
E. secondary structure; ?-pleated sheets
Answer: B
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Evolution, viewed on a small scale, as it relates to changes in a single gene or allele frequency in a population over time, is called
A. macroevolution. B. speciation. C. genetic evolution. D. phenotypic evolution. E. microevolution.
The cell that acts to relay electrical information to other nerve cells is a(n) ____
a. motor neuron b. sensory neuron c. integrator neuron d. interneuron e. glial cell
What is an advantage of cloning horticultural crops rather than using sexual propagation to grow them?
A) Cloned plants are healthier and less susceptible to disease. B) Cloning plants allows for large production of plants with minimal effort and expense. C) Cloned plants grow more slowly but have stronger stems. D) Cloning provides more variation in flower color and size with minimal effort and expense.
Microorganisms require large quantities of ______ for use in cell structure and metabolism.
A. water B. trace elements C. growth factors D. electrolytes E. macronutrients