Answer:C). A phospholipid bilayer with proteins
Explanation: A cell membrane is a phospholipid bilayer with proteins embedded in it. The fatty acyl chains of the phospholipids are non polar and hydrophobic while the phosphate groups are polar and hydrophilic. The hydrophobic regions of the phospholipids interact with each by facing each other, forming a bilayer with a fluid interior. The polar head groups face outward interacting with the external environment of the cell. Proteins are embedded in this bilayer and they float in this sea of phospholipids. Proteins anchored to the membrane through interactions between the hydrophobic regions of the phospholipids and the amino acid side chains of the proteins. These lipids and proteins swim laterally in each face of the bilayer but movement from one face of the bilayer to another is restricted.
What percent of potassium-40 remains undecayed in a rock that is 3.9 billion years old? The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
True. <span>Hormones are chemical substances that regulate many of the body's functions. </span>Hormones are chemical substances<span>, formed in a tissue or organ, that stimulate or inhibit the growth or </span>function of other tissues or organs. They <span>work in conjunction with the endocrine, nervous, and immune systems to </span>regulate many body functions.
(8.314 J/molK)(310K)ln(3E5) = E-EcatE-Ecat
<span>=32504.22 J/mol = 32.504 KJ/mol (pay attention to any requirement on sig fig)
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Hypothesis and conclusion
