The end of the skeletal muscle that remains stationary during a movement is
a. the action.
b. the origin.
c. the insertion.
d. none of the above.
b
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Polyploidy is characterized by ____
a. the failure of homologous chromosomes to separate properly during meiosis b. a condition in which one chromosome is present in three copies c. a condition in which one member of a chromosomal pair is missing d. a chromosomal number that is not an exact multiple of the haploid set e. a chromosomal number that is a multiple of the normal haploid chromosomal set
The enzyme used by retroviruses to make a DNA copy of their RNA genome is called ________.
A. reverse transcriptase B. RNA replicase C. RNA polymerase D. DNA polymerase
Which gas is increasing the most in the atmosphere, thereby intensifying the greenhouse effect?
A. Carbon dioxide B. Carbon monoxide C. Ozone D. Nitrogen E. Oxygen
Which process might be affected by the mutation of a transmembrane protein in the mitochondrial membrane?
A. establishment of hydrogen ion gradient B. reduction of coenzyme NADH C. reduction of coenzyme FADH2 D. glucose transport into the mitochondrion E. transfer of acetyl CoA into the mitochondrion