Which of the following statements is true about starch?
A) Starch is a polysaccharide.
B) Energy from starch is immediately available to fuel cellular processes.
C) Starch tastes sweet as soon as it is put on the tongue.
D) Starch is the primary form of energy storage in humans.
E) Starch is a simple sugar.
A) Starch is a polysaccharide
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With respect to chromosomes, the difference
between normal human males and females is defined by which of the following? a. In females, one X is deleted. b. Females possess one X and one Y. c. Males possess an X and a Y. d. Females have three Xs. e. Males have two Xs and a Y.
Biologists currently recognize three kingdoms: Plants, Animals, and Protists.
a. true b. false
The diffusion of water molecules across a selectively permeable membrane is called
A) facilitated diffusion. B) exocytosis. C) active transport. D) osmosis. E) hydrolysis.
Why do Na+ ions enter the cell when voltage-gated Na+ channels are opened in neurons?
A) because the Na+ concentration is much lower outside the cell than it is inside B) because the Na+ ions are actively transported by the sodium-potassium pump into the cell C) because the Na+ concentration is much higher outside the cell than it is inside, and the Na+ ions are attracted to the negatively charged interior D) because the Na+ concentration is much higher outside the cell than it is inside, and the Na+ ions are actively transported by the sodium-potassium pump into the cell