When phospholipid molecules are placed in water
A. the hydrophobic ends of the molecules exclude water from their surroundings.
B. hydrophilic fatty acid ends mix well with the water.
C. a single-layered membrane is formed.
D. All of the choices occur.
A. the hydrophobic ends of the molecules exclude water from their surroundings.
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The major histocompatability (MHC) molecule is important in a T cell's ability to _____
A) distinguish self from nonself B) recognize specific parasitic pathogens C) identify specific bacterial pathogens D) identify specific viruses E) recognize differences among types of cancer
Describe normal embryo formation and two mechanisms of nondisjunction represented in the figure and identify the consequences of these chromosomal anomalies
What will be an ideal response?
Answer the question using the accompanying figure. Which number identifies a structure that aids in attachment?
a. 1 b. 2 c. 3 d. 7 e. 8
Which of the three gasses is the easiest to break apart: nitrogen gas (N2), oxygen gas (O2), or hydrogen gas (H2)? Which is the most difficult to break apart? What accounts for the differences?
What will be an ideal response?