In a ________ circulatory system, circulation of blood is more controlled-the blood is moved faster and more efficiently than in other types of circulatory systems.
Fill in the blank(s) with the appropriate word(s).
closed
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Chronic myelogenous leukemia is an example of a proto-oncogene activation by ____
A. Action of a virus B. Missense mutation C. A translocation D. Gene amplification E. None of the answers are correct
Which of the following is a true statement? a. In Japan, people over age 65 make up 10% of the population
b. None of the choices. c. In the United States, projections show that people over the age of 65 will reach 20% of the population by 2030. d. Having a high percentage of people over 65 is good for the economy because older people consume fewer resources.
Cilia in the trachea move mucus toward the ________.
A. epiglottis B. brinchioles
In many organelles, groups of different enzymes are located on membranes in close proximity to each other because
a. attaching enzymes to the membrane prevents the cell from losing them to the surrounding environment. b. when enzymes are in close proximity, each one can catalyze more than one type of reaction. c. these enzymes are involved in the same metabolic pathway and keeping them closer together increases the efficiency of the pathway. d. all enzymes must act in groups to position substrates in the proper orientation to produce the product.