The term used to describe the cloning of an
entire plant from a single cell is
a. sexual meiosis.
b. tissue culture propagation.
c. reduced integration.
d. germination mitosis.
e. phototropism
B
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At which stage is the foreign gene introduced into the developing embryo?
a. blastocyst, via a transgenic cell b. egg, via direct microinjection of the new DNA c. sperm, via direct microinjection of the new DNA d. in cell culture, prior to fertilization e. it all depends on the method the particular researcher prefers.
What is one function of the structure labeled A in the accompanying figure?
a. attachment b. locomotion c. protein-making d. breathing e. communication
Which of the following statements is false?
a. Hemoglobin functions as a buffer. b. Bicarbonate ions tend to diffuse out of red blood cells into the blood plasma. c. The movement of molecules go in different directions in the metabolically active tissues and the alveoli. d. Carbonic anhydrase is an enzyme that promotes the formation of oxyhemoglobin. e. Hemoglobin consists of four polypeptide chains.
Step 2 in the accompanying figure is accomplished by an influx of:
a. Ca2+
b. Na2+
c. K+
d. Na2+
e. K+