Describe the three general functions of the cardiovascular system.
What will be an ideal response?
1. Transport: Transports oxygen and nutrients to the cells and removes carbon dioxide and other waste products of metabolism.
2. Protection: The cells of the immune system carried within the blood help protect the body from infection.
3. Regulation: Participates in the homeostasis of a variety of the body's conditions, including temperature, pH balance, and water and electrolyte levels.
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Which is true about C. botulinum?
A. It is anaerobic. B. It may form spores. C. It produces a neurotoxin. D. It does not grow well below pH 4.5. E. All of the choices are correct.
Citrate synthase is the first enzyme in the citric acid cycle and is also able to be regulated to control the
amount of ATP that is produced as a result of the citric acid cycle. Why is early regulation the most beneficial method for the cell?
a. There is less wasted energy by regulating early steps. b. More ATP can be produced before the system is shut off. c. NADH is rarely found in the cell and needs to be conserved. d. The first enzyme is more amenable to regulation. e. There is no possible way to control the last enzyme in a pathway.
Answer the following statements true (T) or false (F)
1. Researchers can readily extract DNA from one organism and merge that DNA into another organism, applying genetic engineering as a possible cure to cancer or muscular dystrophy and other diseases. The scientific method can test a hypothesis to determine if this approach is morally right or wrong.
2. In this experiment, if the scientists giving the placebo (low, medium, or high vaccine doses) did not know which dose they were administering, then this would be an example of a double-blind experiment.
3. A theory is an advanced hypothesis that has been proven to be true.
4.
These glucose and fructose molecules will bond to form a monosaccharide with the removal of water.
5. The property of water demonstrated by a water strider, as it remains on top of the water, is that water molecules are held together by ionic bonds.
__________ are animals with a backbone. Fill in the blank(s) with the appropriate word(s)