A hydrogen bond between the amino acid side groups (R groups) of two different polypeptide chains in a multichain

protein would be considered part of the ____ structure of the protein.



a. primary
b. secondary
c. tertiary
d. quaternary
e. linear


ANSWER: d

Biology & Microbiology

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Reproductive isolating mechanisms are divided into categories based on when they act. ____ isolating factors prevent fertilization from taking place; ____ isolating factors result in failure of the fertilized egg to develop into a fertile individual

Fill in the blank with the appropriate word.

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What is the composition of the tunic that covers the outer body of urochordates?

a. protein b. calcium c. carbohydrate d. cholesterol

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The number of new cases of a disease in a population over a specific period of time compared with the healthy population is the ________.

A. epidemic rate B. mortality rate C. incidence rate D. morbidity rate E. prevalence rate

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Which is an example of a density-independent factor on a population?

A. Weather B. Amount of prey C. Intraspecific competition D. Nesting sites E. Predation

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