The NFL has stated that about one in four football players will exhibit signs of cognitive impairment as a result of repeated trauma to the brain. Which of the following is a result of such repeated trauma?
A) Brain tissue starts to deteriorate.
B) Abnormal proteins build up in the brain tissue.
C) Neurons in the brain are killed off.
D) All of the above are true.
D
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Which of the following takes place as an ice cube cools a drink?
A) Molecular collisions in the drink increase. B) Kinetic energy in the liquid water decreases. C) A calorie of heat energy is transferred from the ice to the water of the drink. D) The specific heat of the water in the drink decreases. E) Evaporation of the water in the drink increases.
Glycolytic enzymes also function in which of the following processes?
A) cell division B) glycolysis C) apoptosis D) growth factors E) all of the above
When two alleles of the same gene are
identical, the individual carrying those alleles is said to be
a. dominant. b. heterozygous. c. recessive. d. genotypical. e. homozygous
While looking under a microscope, you see two neighboring daughter cells. One of the cells contains three chromosomes, and the other contains five. The parent cell normally contains four chromosomes. What could be the reason for the different number of
chromosomes in the cells? A) Replication of DNA did not occur properly. B) The nuclear envelope did not dissolve, so mitosis could not occur at all. C) The division of sister chromatids of one chromosome did not occur properly during mitosis. D) The division of homologous chromosomes during meiosis II did not occur properly.