It may consist of atoms of a single chemical element, as with oxygen (O2), or of different elements, as with water (H2O). As components of matter, molecules are common in organic substances (and therefore biochemistry) and are what allow for life-giving elements, like liquid water and bre...
The representative particle of an ionic compound is the formula unit. A formula unit uses a formula to calculate the basic whole number ratio of the ions in an ionic compound. Diatomic Elements Diatomic elements, or molecules, are made up of two atoms of the same element. These diatomic elem...
What are the four main classes of macromolecules important to life? Biological Macromolecules: Macromolecules are large molecules known as polymers that are composed of repeating subunits known as monomers. There are four classes of macromolecules that perform a variety of tasks and functions f...
This geological process created complex molecules of hydrogen and carbon. Oil can also contain other elements. Crude oil, or unprocessed petroleum, is called sour when it contains a lot of sulfur, an impurity. Sour crude requires more refining than sweet crude, which is often more valuable. Ite...
The Earth's atmosphere is as large as it is invisible. A huge bubble of gases surrounds the Earth that humans and animals rely on to stay alive, but do not see or interact with consciously. Despite this invisibility, there's a lot more to the Earth's atm
Blood can be divided into two major components: Formed elements and plasma. What are the formed elements? Identify the formed elements of the blood. What is the main element found in blood? Which of the formed elements of blood is responsible for coagulation (blood clotting)?
MHC class I molecules (MHC-I) are cell surface recognition elements expressed on virtually all somatic cells. These moleculessample peptides generated within the cell and signal the cell's physiological state to effector cells of the immune system, both T lymphocytes and natural killer (NK) cells...
Ozone (O₃) is a gas consisting of three oxygen atoms. Because ozone is made of only one element, it isn’t a compound. Salt water consists of water (H₂O) and salt (NaCl). There are four different elements present, but they are not all combined chemically. The water molecules an...
naturally and another 26 that scientists have created in laboratories (although this number fluctuates as scientists discover and create new elements). Each element is comprised of atoms that are unique to that element; hydrogen atoms are different from gold atoms, which are different from neon ...
Microtubules also contribute to the parts of the cell that help it move and are structural elements of cilia, centrioles and flagella. The male sperm cell for example, has a long tail that helps it reach its desired destination, the female ovum. Called a flagellum (the plural is flagella)...