Chapter 3 Biochemistry
Polysaccharides are
Carbohydrates
Which three elements are often found in organic compounds
Carbon, hydrogen, and oxygen
What forces holds two molecules together
Cohesion
The formation of polymers from monomers occurs as a result of reactions, and the breakdown of polymers into monomers occurs as a result of reactions
Condensation hydrolysis
Nucleic acids include
DNA and RNA
Water is a polar molecule because
Different parts of the molecule have slightly different charges
Which organic molecule below is most closely related to nucleic acid
Nucleotides
Water is important to life because
A. Surroundings all cells B. Is found inside cells C. influences the shape of the a membrane D. All of the above
Which of following characteristics of of water is not a result of hydrogen bonding
A. adhesive strength B. capillarity C. cohesive strength D. all of the above are a result of hydrogen bonding
Water molecules break up other polar substances
A. such as sugars B. because of the uneven charge distribution that exists in water molecules C. Thus freeing ions in these substances for use by the body D. All of the above
All organic compound contain the element
C
Breaking of bond is the first thing that happens when water is heated, which means that it takes a great deal of thermal energy to raise the temperature of water
Hydrogen
The formation of ADP and inorganic phosphate from ATP and water is an example of which kind of reaction
Hydrolysis
Which of the following is not an organic macromolecule
Ice
Carbon is different from most other elements in that
It readily bonds with other carbon atoms
Liquid fats called oils contain
Long CH2 chains linked by double covalent bonds
Nonpolar molecules have
No negative or positive poles
Lipids are
Nonpolar molecules
Liquids are soluble in
Oil
Water is very effective at dissolving other polar substances because of its
Polar
A molecule that has a partial positive charge on one side and a partial negative charge on the other side is called a
Polar Molecule
Amino acids are monomers of
Protein
Because carbon atoms have four electrons in their outermost energy level, they tend to form covalent bonds with other atoms
Single
All of the following are examples of lipids except
Starch
All of the following are examples of carbohydrates expect
Steroids
Which of the following is a carbohydrate
Sucrose
Which of the following is not true of alcohols
They are the only kind of functional group in organic molecules that contain oxygen
T/F Because water is a polar molecule, it tends to cause ionic compounds mixed in water to dissociate into ions
True
T/F Capillarity is apparent when you put a straw in water and the water level inside the straw rises higher than the level in the surrounding container
True
T/F Functional groups are the side groups of carbon compounds that confer specific properties to these compounds
True
T/F Organic compounds are substances produced and found in living things
True
In a condensation reaction, two molecules become linked together and a molecule of is produced
Water
