The segments of a transmembrane protein that cross the lipid bilayer usually consist of:

What will be an ideal response?


an ? helix with mostly nonpolar side chains.

Biology & Microbiology

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Which of the following is NOT true of human

chromosomes? a. The haploid number is 23. b. The diploid number is 46. c. There are 23 pairs of chromosomes. d. Human gametes end up with two of each type of 23 chromosomes. e. Human gametes end up with one of each type of 23 chromosomes.

Biology & Microbiology

Vaccinations involve injecting ________ into the person or animal

A) weakened or killed microbes B) antibodies against the disease C) antibodies against similar diseases D) antibiotics E) the disease itself

Biology & Microbiology

The way the tendons in the legs of a kangaroo aid in locomotion is most like

A) stepping in mud and the mud spreading out as your foot sinks in. B) stretching and contracting a rubber band. C) the circular movements of the wheels of an automobile. D) smashing an apple to make applesauce.

Biology & Microbiology

The Limulus amoebocyte assay is used to detect minute amounts of endotoxin in drugs and medical devices

Indicate whether the statement is true or false

Biology & Microbiology