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Liberty University's Dr. Sphon's EXAM 1 study tool.

hydrophilic

A polar molecule can be described as being

fill electron shells that are occupied but not full

Atoms form chemical bonds in an effort to

When an electron moves to a shell further from the nucleus, it loses energy.

Which of the following statements concerning electrons is false?.

monosaccharide

Glucose is an example of a:

It has 100 times more hydroxide ions.

How does the H+ concentration of a solution with a pH of 5 compare to a solution with a pH of 3?

oppositely charged regions of polar molecules that contain covalently bonded hydrogen

Hydrogen bonds occur between:

Water comprises 30% of blood.

Which of the following statements describing water is false?

occur between atoms sharing 1 pair of electrons

Single bonds:

6 protons and 6 neutrons

The atomic number of carbon is 6, and the atomic mass is This indicates that one atom of carbon will contain:

an atom

The smallest functional unit of matter is:

a double bond

What type of bond is found in the fatty acid tail of an unsaturated fat that is not found in the fatty acid tail of a saturated fat?

13

Which of the following is the pH of a strong base?

the placement of polar and charged groups in the chain of amino acids

What determines the way a protein will fold up to form the tertiary structure?

denaturation

Which term refers to permanent changes that occur to a protein if for example it is exposed to high temperatures?

cholesterol

Which of the following is an example of a steroid?

False

Cellulose is a polysaccharide synthesized by plants and digested by humans for energy. T/F

False

A molecule that can donate H+ to solution is called a base. T/F

True

An enzyme is a protein that functions as a biological catalyst. T/F

False

A subatomic particle that has one positive charge and is located in the nucleus is a neutron.T/F

True

An isotope contains more or fewer neutrons than found normally in an atom of a particular element.T/F

True

DNA is double stranded and RNA is single stranded.T/F

False

Proteins are macromolecules composed of long strings of single units called nucleic acids T/F

True

The structure of phospholipids includes a water-soluble phosphate group and water-insoluble fatty acid tails. T/F

True

Organic compounds are broken down during the chemical process of hydrolysis. T/F

True

The primary level of protein structure is represented by the sequence of amino acids. T/F

True

A buffer is a substance which minimizes potential changes in pH. T/F

False

A solute is a liquid in which other substances will dissolve. T/F

False

Once an ATP molecule is used by a cell, the ADP that is left must be removed from the cell since it cannot be recycled. T/F

False

Triglycerides are polar and thus are soluble in water. T/F

False

Oligosaccharides are composed of thousands of monosaccharides arranged in straight or branched chains. T/F

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