The most ancient of the energy pathways among organisms is probably

A. glycolysis.
B. aerobic respiration.
C. the Krebs cycle.
D. the Calvin cycle.
E. photosynthesis.


A. glycolysis.

Biology & Microbiology

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A person with which of the following blood types is a universal donor who can donate blood

to anyone with any other blood type?

a. O b. AB c. A d. B

Biology & Microbiology

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.

Biology & Microbiology

Destruction of the motor areas in the left cerebral

cortex results in the loss of a. sensation on the right side of the body. b. sensation on the left side of the body. c. voluntary movement on the left side of the body. d. voluntary movement on the right side of the body. e. involuntary control of the autonomic system.

Biology & Microbiology

The source of diversity for B and T cell receptors is

a. mitosis. b. meiosis. c. transcript processing. d. random recombination of genes. e. gene transcription.

Biology & Microbiology