What is the main component of an animal cell membrane?

A. glycolipids
B. phospholipids
C. cholesterol
D. polynucleotides
E. aquaporins


Answer: B

Biology & Microbiology

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An ionic bond forms when

A. an electrical attraction occurs between two atoms of different charge. B. a nonpolar attraction is formed between two atoms. C. a valence electron is shared between two atoms. D. two atoms have similar attraction for electrons.

Biology & Microbiology

The human body requires about ____ of fat each day to stay healthy

a. 1 teaspoon b. 4 teaspoons c. 1 tablespoon d. 4 tablespoons e. 1 cup

Biology & Microbiology

Chemical reactions that can proceed toward either anabolism or catabolism are called

A) glycolytic. B) light-independent. C) synthetic. D) cyclic. E) amphibolic.

Biology & Microbiology

Besides Darwin, the theory of evolution by means of natural selection was also independently proposed by:

A. Charles Lyell. B. Karl Popper. C. Thomas Malthus. D. Peter Raven. E. Alfred Wallace.

Biology & Microbiology