Making and breaking molecules in the body require the aid of ________ to help the reactions proceed.
A. blood
B. heat
C. enzymes
D. water
Answer: C
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A chi-square test is used to
(a) determine if experimental data adequately matches what was expected. (b) analyze a Punnett square. (c) determine parental genotypes producing a given offspring genotype. (d) determine if a trait is dominant or recessive.
Given what you learned from the chapter on population growth in various regions of the world, in which of these growth stages shown in the graph below would you place the countries on the continent of Asia?
a. Stage 2
b. Stage 3
c. Stage 1
d. Stage 4
The most radiosensitive macromolecule is _____.
a) protein b) DNA c) mRNA d) tRNA
Which of the following is not true about the interaction of biofilms on teeth?
A) Brushing teeth twice daily and flossing will physically remove superficial plaque layers. B) Bacterial growth within deeper biofilm layers and new bacteria entering the mouth quickly reestablish what was removed from brushing. C) Limiting dietary fats reduces lactic acid production by the bacteria in dental plaque and decreases the risk for dental caries, D) When plaque calcifies into tartar it must be scraped off the teeth. E) Dentists recommend a twice-yearly dental cleaning and checkup to limit caries and periodontal disease,