Probes for cloned genes use
a. complementary nucleotide sequences
tagged with a detectable label.
b. specific antibodies that kill all the cells
except those that have incorporated the
genes.
c. specific enzymes that lyse all the cells
except those that have incorporated the
genes.
d. certain bacteria that glow when they take
up the genes.
e. all of these.
A
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Which of the following determines the force production in muscle contraction?
a. the amount of acetylcholine released into the synapse b. the speed of the acetylcholinesterase acting to break down acetylcholine c. the number of myofibers receiving an action potential from the neuron d. the length of the sarcomeres involved in the contraction
In this reaction, acetaldehyde represents the
a. enzyme. b. substrate. c. product. d. activation energy. e. trigger.
Which of the following statements is not true of multifactorial traits?
1.They are controlled by multiple genes.
2.They can be impacted by the environment.
3.They exhibit a bell-shaped curve.
4.All of these statements are true.
During prophase, duplicated chromosomes
a. consist of chromatids. b. contain centromeres. c. consist of nucleoproteins. d. contain all of the above.