BIOL 1500 Chapter Notes - Chapter 2: Fructose, Peptide, Saccharin

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lavenderhare889

13 May 2012

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{element} substance that cannot be broken down chemically into any other substances. {atom} an atom is a bit of matter that cannot be subdivided any further without losing its essential properties. {atomic mass} made up of the combined mass of all of its protons and neutrons. {atomic number} corresponds to how many protons it has. {molecules} are groups of atoms held together by bonds. {covalent bonds} are strong bonds formed when two atoms share electrons. The chemistry that is the most important in biology revolves around a few important elements. Whatever the element, if you keep cutting it into ever smaller pieces, each of the pieces behaves exactly the same as any other piece. Whirling around the nucleus of every atom are negatively charged particles called electrons. Particles that have the same charge repel each other, those with opposite charges are attracted to each other.

Related Questions

When two or more different elements bond together, compounds are formed.

The smallest parts of these compounds that retain their original properties are called molecules.

All atoms contain negatively charged electrons that orbit around a positively charged nucleus.

The nucleus contains positively charged ____________ and neutrally charged ____________ .

It is the ____________ charged ____________ that give atoms properties that are favorable in forming chemical bonds.

1. An ionic bond between two atoms is formed as a result of the ______________.

a) sharing of electrons

b)transfer of electrons from one atom to the other.

c) loss of electrons from both atoms.

d) loss of a proton from one atom

2. Choose the phrase that best completes this sentence: Microtubules ____________ and are required to pull duplicated chromosomes to opposite poles of dividing cells.

a)generate contractile forces

b)are intermediate in thickness

c)are found in especially large numbers in muscle cells

d)can rapidly reorganize

3. Which subatomic particles contribute to the atomic number for any given element?

a)protons

b)neutrons

c)protons and electrons

d)protons and neutrons

The following arebasic building blocks of biopolymers. Match the building blockswith the statements below.

amino acid

glucose

glycerol

fatty acid

nucleotideâ

The following are important terms relating to waterâs specialproperties. Answer the questions below by matching the descriptionswith the most appropriate word.

a.	hydrophobic
b.	hydrophilic
c.	salt
d.	solute
e.	solvent

A liquid that dissolves other substancesâ

the hydrophobic component of lipidsâ

The following are important terms relating to waterâs specialproperties. Answer the questions below by matching the descriptionswith the most appropriate word.

a.	hydrophobic
b.	hydrophilic
c.	salt
d.	solute
e.	solvent

â A dissolved substance

Which statement is false?

Answers:	a. âChemical bonds form between molecules of solute andsolvent.
	b. âTwo atoms of oxygen make a molecule of oxygen.
	c. âA molecule must be made of at least two atoms.
	d. âElements are found in compounds and molecules.
	e. âCompounds are made of element. I need help please as soon as possible

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BIOL 1500 Chapter Notes - Chapter 2: Fructose, Peptide, Saccharin

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