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57 Cards in this Set

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The foods that we eat can be classified into three major groups of nutrients. What are they?

Carbohydrates, lipidss and proteins.

What are the functions of vitamins and minerals and where are they found?

Help in chemical reactions and found in complex chemicals.

What is the function of carbohydrates?

They are a primary energy source of all cells and its structural material of plant cell walls

What is the function of proteins?

Structural component of the cell and made of amino cells.

What are nucleic acids and what is the function?

The genetic material that directs cell activity and is composed of sugar,phosphate, and nitrogen bases.

What are lipids(fats?

Energy storage compounds and structural component or cell membranes.

What are the chemicals of life?

Vitamins and minerals, lipids(fats),carbohydrates, proteins and nucleic acids.

what are large organic molecules called?

Macromolecules

What are polymers?

Long molecules formed by bonding many small,similar chemical subunits together.

What is a metabolism?

The chemical reactions that take place within a cell to support band sustain its life functions.

What is a catabolic?

Chemicals are broken down.

What is hydrolysis?

Process where larger molecules are broken down into smaller molecules by the addition of water.

what is the definition of anabolic?

Reactions in which larger chemicals are built from smaller components.

What is dehydration synthesis?

Process where larger molecules are formed by the removal of water from two smaller molecules.

How can you recognize common sugars?

By the -ose suffix.

What are monosaccharides?

Mono means one so it consists of a single sugar unit.

What are disaccharide?

Di means two so it consists of two sugar units.

What is a polysaccharide?

Poly means many so it consists of many,repeating monosaccharide sugar units bonded together.

How are disaccharides formed?

By dehydration synthesis where a water molecule is removed and the 2 monosaccharides are bonded together.

What is a polysacchride made of?

Complex carbohydrate that is made from many simple sugars bonded together by dehydration synthesis

What is a common plant polysaccharide?

Starch

What are the two forms of starch?

Amylose and amylopectin.

What is a amylose?

1000 or more glucose units molecules joined by the first C of glucose bonded to the fourth C of another glucose. IT is unbranched.

What is a amylopectin?

1000-6000 glucose subunits with short branching chains. It is a branched molecule.

What does the Benedict reagent identify?

Identifies all monosaccharides and only some disaccharides. This test can measure the approximate % of sugar. If the Benedicts reagent is blue, no monosacchrides are present. If it turns a variety of col ours monosaccharides are present. The col our determines the % of sugar present.

What does the iodine solution identify?

It identifies starch. It turns black/blue on the presence of starch. If starch is not present, it is yellow.

What is glycogen?

Animal storage of carbohydrates, type of polysaccharide with a lot of branching, contains 16-24 glucose units, structure reassembles amylopectin starch molecule, and animal storage product that accumulates in the vertebrae liver.

How is glycogen formed?

Formed when excess sugar is stored in the muscles and liver (usually during rest)

As sugar levels drop glycogen, what happens?

It converts back to individual glucose units(usually during exercise).

What polysaccharide is made up of the plant cell walls?

Cellulose

What is cellulose composed of?

Many glucose units

What holds cellulose together?

Hydrogen bonding of the OH group

Does cellulose form coiled units like starch?

They do not like starch

Can cellulose be digested humans?

No

What are lipids made of?

Of subunits glycerol and fatty acids by the process of dehydration synthesis.

Lipids serve as key components in cell membranes, how do they act?

They act as cushions to protect delicate organs, carriers of vitamins A,D,E,and K and they act as raw materials for synthesis of hormones.

What are fats?

Tryglycerides that are solid at room temperature.

What are oils?

Tryglycerides that are liquid at room temperature.

What does saturated mean?

Bonds between carbon atoms are all single bonds.

What does unsaturated mean?

That the bonds between the carbon atoms contain double bonds.

what is atherosclerosis?

Build up of cholesterol in the walls of blood vessels.

What are the two important types of cholesterol?

Low density lipoprotein(LDL) and high density lipoprotein(HDL)

What is LDL

Bad cholesterol,forms deposits in the walls of arteries, and the accumulation of cholesterol and other substances in artery was called plaque. It restricts blood floe and may lead to a heart attack or stroke.

What is HDL?

Good cholesterol, carries bad cholesterol back to the liver where it is broken down.

What are trans fat?

When H is added to unsaturated fats in order to increase shelf life of food which called hydrogenation or transformation of unsaturated fats and this forms saturated fats which don't break down as readily in our bodies.

What are proteins?

Used to form structural parts of cells, used to repair cell damage,not generally use a source of energy but they can do this and they are composed of mitochondria and ribosomes.

What are enzymes?

Proteins that speed up chemical reactions.

What are amino acids?

Subunits of proteins and made up of central c atom,bonded to a H atom and 3 other groups of atoms.

How can you determine the type of protein?

By the number and type of amino acids.

What is a peptide bond?

A covalent bond that forms between the amino group of one amino group of one amino acid and the carboxyl(acid) group of the next amino acid.

What is a polypeptide?

A chain of 3 or more amino a acids.

what is denaturation?

Process where the bonds in a protein are disrupted causing a temporary change in the protein's shape

What is coagulation?

Process where the bonds in a protein are disrupted causing a permanent change in the shape of the protein.

What are nucleic acids?

Genetic material that directs cell activity.

What is DNA?

A deoxyribonucleic acid. It is a double stranded molecule that contains genetic information.

What is RNA?

A ribonucleic acid

NOT

DONE