The eukaryote cell membrane is composed of

A. Sterols
B. Proteins
C. Phospholipids
D. All of these
E. Only sterols and phospholipids


Answer: D. All of these

Biology & Microbiology

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The ability of cells to control their level of gene expression is called

A. gene transformation. B. gene regulation. C. gene splicing. D. gene addition. E. gene correction.

Biology & Microbiology

What is a fundamental difference between circular and linear metabolic pathways?

a. Only circular metabolic pathways require a net input of energy to continue. b. Linear metabolic pathways do not require facilitation by enzymes to begin. c. The reactants of linear metabolic pathways do not include their reactants. d. Linear metabolic pathways create polymer chains without carbon rings.

Biology & Microbiology

Many species of terns nest on the ground in seabird colonies. However, if nests are too close together, aggression will

break out. This tends to produce a(n) ____.

a. near-uniform population distribution b. opportunity for predation c. clumped population distribution d. opportunity for exponential growth e. random population distribution

Biology & Microbiology

If all the offspring of a cross have the genotype Aa

Bb, the parents of the cross will most likely be a. AA BB x aa bb. b. AA bb x aa BB. c. Aa Bb x Aa Bb. d. Aa bb x aa Bb. e. AA BB x aa bb or AA bb x aa BB.

Biology & Microbiology