Red muscle fibers contain an abundance of _____ for aerobic respiration.
A. myosin
B. indentations
C. myofibrils
D. sarcomeres
E. myoglobin
Answer: E
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Which statement makes a correct comparison between the regulation of an operon and controlling the
motion of a car?
a. The removal of a repressor is like stepping on the gas pedal of a car. b. The removal of a repressor is like removing your foot from the brake pedal of a car. c. The removal of a repressor is like moving your foot from the brake pedal to the gas pedal of a car. d. The removal of a repressor is like moving your foot from the gas pedal to the brake pedal of a car. e. The removal of a repressor is like removing your left foot from the brake pedal of a car while your right foot remains on the gas pedal.
Bat wings, human forearms, elephant legs, and
cat forelimbs are what type of structures?
a. analogous structures b. homologous structures c. vestigial structures d. homozygous structures e. heterozygous structures
The somatic hypermutation (SHM) that contributes to immunoglobulin diversity is similar to the process of
a. resolution of a Holliday junction. b. class switch DNA recombination (CSR). c. somatic recombination. d. double-strand break repair. e. nonhomologous end-joining.
A mycologist visits your biology class and discusses her research on a particular fungus that lives on the bark of damaged spruce trees. She explains that the fungal hyphae of her research organism is heterokaryotic. You raise your hand and request that she define that word. Her correct response is
A. heterokaryotic means that the nuclei of each compartment of the hyphae are genetically distinct. B. heterokaryotic means that each compartment of the hyphae contain two distinct nuclei. C. heterokaryotic means that each compartment of the hyphae contains only one nucleus. D. heterokaryotic means that the nuclei of the fungal hyphae are genetically the same.