Which carbohydrate forms the cell wall during cytokinesis in plant cells?
A) cellulose
B) sucrose
C) glucose
D) lactose
A
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If mRNA is not modified what will result? a. The mRNA will not be able to leave the nucleus
b. The cell will self destruct. c. Mutation. d. The new protein will become activated earlier. e. The DNA code will become altered.
The term immunity comes from the Latin immunis, which means
a. protect. b. exempt. c. attack. d. sword. e. cow.
The above diagram is an example of ____
a. a closed circulatory system with one heart b. an open circulatory system with one heart c. a closed circulatory system with a three-chambered heart d. an open circulatory system with a two-chambered heart e. a closed circulatory system with a four-chambered heart
Which of the following statements about an action potential is NOT true?
A. An action potential takes 2 to 5 seconds. B. Repolarization occurs when potassium leaves the axon. C. There is a rapid change in polarity from about -70 mV to about +35 mV during depolarization. D. Potassium gates open after the sodium gates and allow potassium ions to leave the cell. E. Depolarization occurs when sodium gates open and allow sodium ions to enter the axon.