Which of the following is a large protein complex in the thylakoid membrane, which consists of pigments and other molecules that convert light energy to chemical energy in photosynthesis?
A. Photosystem
B. Photosynthesizer
C. Photolysis
D. Electron transfer phosphorylation
E. Stomata
Answer: A
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The conducting cells in xylem are
A. sieve tube elements. B. tracheids and sieve tube elements. C. tracheids. D. tracheids and vessel elements. E. vessel elements.
Parasitism usually affects populations in a ________ manner.
A. random B. inverse density-dependent C. cyclic D. density-independent E. density-dependent
The antidiuretic hormone (ADH) is regulated by negative feedback. Which of the following statements is correct about ADH regulation?
A) A high blood concentration of ADH will make you feel thirsty. B) A high blood concentration of ADH will cause you to excrete dilute urine. C) Drinking a lot of water will increase the rate of ADH production. D) A high blood concentration of ADH will increase the rate of ADH production. E) Loss of water from your bloodstream will limit further production of ADH.
Which of the following does not describe cellular respiration?
A) collection of reactions that extract energy from food using redox reactions B) may include multiple pathways including glycolysis, an intermediate step, the Krebs cycle and fermentation C) occurs in part in the mitochondria of eukaryotic cells D) involves a transfer of energy into the bonds of ATP E) may occur in both prokaryotic and eukaryotic cells