A competitive inhibitor interferes with:
A. the oxidized site of the enzyme so a substrate cannot bind
B. the active site of the enzyme so a substrate cannot bind
C. the reduced site of the enzyme so a substrate cannot bind
D. the allosteric site of the enzyme so a substrate cannot bind
E. the repressor site of the enzyme so a substrate cannot bind
Answer: B
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____ behaviors are instinctive and carried out regardless of earlier experience
Fill in the blank with the appropriate word.
Use of cytokinins has had wide application in the horticultural industry because cytokinins are used in:
A. tissue cultures B. fruit production C. stem elongation D. flower maturation E. root development
The red panda, a fox-like animal, once was classified as a type of bear, based on morphological characteristics. Which of the following statements is a reasonable deduction based on this phylogenetic classification of the red panda?
a. It means red pandas look like panda bears. b. It means that DNA sequencing was used originally, but morphological evidence later showed otherwise. c. It means that red pandas shared a recent common ancestor, or node, with foxes. d. It means that red pandas are more closely related to raccoons than bears. e. It shows that phylogenies are hypothetical, subject to revision and modification.
The chemical mediators of anaphylaxis are
A) found in basophils and mast cells. B) antibodies. C) antigens. D) antigen-antibody complexes. E) the proteins of the complement system.