DNA is composed of four nucleotides, A, C, G and T. Each codon is composed of three nucleotides. The number of possible codons is
A) 16.
B) 4.
C) 12.
D) 64.
E) 32.
D
Bloom's Taxonomy: Application
Section: Gene Function
Learning Outcome: 7.13
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The Gause experiments showed that ________
a. two species of protozoan grown individually had the same growth curve as when grown together b. competitive exclusion only exists between very different species c. two species of protozoan could share the same resources d. competitors cannot coexist in a habitat when they need exactly the same limited resource
A reaction in which the forward rate is equal to the reverse rate is said to be at ________.
Fill in the blank(s) with the appropriate word(s).
An agricultural worker experiences difficulty breathing which becomes progressively worse. Tests show inflammation and damage of the lung tissue, but IgE antibodies and granulocytes are in the normal ranges. With which disorder of the immune system are these signs and symptoms consistent?
A. allergic reaction B. type III (immune complex-mediated) hypersensitivity C. type IV (delayed) hypersensitivity D. autoimmunity E. acquired immunodeficiency
During respiration, what is the additional amount of air that can be exhaled from the lungs during an extra-deep exhalation called? This volume is usually around 1,400 ml.
A. inspiratory reserve volume B. residual volume C. tidal volume D. vital capacity E. expiratory reserve volume