Bio Chem
What is the ratio of hydrogen atoms to oxygen atoms in glucose
2:1
#20 Which enzyme functions best in a pH environment most similar to that of human stomach enzymes?
A
#37 This type of molecule is composed of a sequence of
Amino acids arranged in a specific order
#22 Which change would NOT affect the relative rate of action of enzyme X?
An increase in temperature from 70 C to 80 C
The instructions for the traits of an organism are coed in the arrangeent of
Bases in DNA in the nucleus
#9 what substance belongs in area Z
Carbon
A sequence of 3 nitrogenous bases in messenger-RNA molecule is known as a
Codon
The chemical reaction taking place in a cell will most likely speed up if the
Concentration of the reactants is increased
#47 What is the relationship between these 3 structures
DNA controls the production of protein in the cell
Water is classified as an inorganic compound because it
Does not contain carbon
Which class of molecules is responsible for speeding up chemical reactions?
Enzymes
#15 This diagram best illustrates the relationship between
Enzymes and synthesis
Which statement about enzymes is NOT correct?
Enzymes are destroyed when they are use and must be synthesized for each reaction.
An energy-rich organic compound NEEDED by organisms is
Glucose
Which statement explains the importance o maintaining a constant internal environment to ensure proper enzyme functioning?
Increasing the temperature and pH can alter the specific shape of enzymes
Which statement best describes messenger RNA
It is composed of a single strand of nucleotides
#27 the enzyme would most likely affect reactions involving
Molecule C onlyy
#14 What characteristic best describes the molecule Z?
Molecule Z will function best at a specific pH.
Proteins, starch and DNA are similar in that they are all
Organic Compounds
WHat is t he name of the bond linking amino acids together?
Peptide bond
THe function of a specific enzyme is most directly influenced by its
Physical shape
Enzymes are a type of
Protein
Which group consists entirely of organic molecules?
Protein, Starch, Fat
Which statement concerning proteins is NOT correct
Proteins are bonded together, resulting in simple sugars
#46 Which process is most directly affected by the arrangement of components 1-4
Sequencing of amino acids in cells
In living organisms, lipids function mainly as
Sources of stored energy and components of cellular membranes
A fully functioning enzyme molecule is arranged in a complex 3D shape. This shape determines its
Specific type of molecule it interacts with during a reaction
Which compound is a polysaccharide
Starch
#24 What would happen if a temperature change caused the shape of the active site to be altered?
The dipeptide would digest slower or not at all
#19 Which statement is supported by the information in the graph below?
The enzymes respond in a similar way to changes in temperature
Which statement best describes enzymes?
The rate of activity of an enzyme might change as pH changes
Which state describes a similarity between all enzymes, antibodies and hormones ?
Their chemical structure is critical to their ability to function
Which statement best describes all enzymes?
They affect the rate of chemical reactions
Which statement describes starches, fats, proteins and DNA?
They are complex molecules made from smaller molecules
In the synthesis of proteins, what is the function of messenger-RNA molecules
They carry info that determines the sequence of amino acids
Which base is normally used in the synthesis of RNA but NOT in the synthesis of DNA
Uracil
Which substance is an inorganic molecule?
Water
Which substance plays major role in most of the chemical reactions that occur in a living cell
Water
the basic building blocks of proteins are
amino acids
Most organisms contain
both organic and inorganic compounds
A chemical analysis of organisms from each kingdom shows that living things are primarily composed of the elements
carbon, hydrogen, oxygen and nitrogen
Shrimp that lie in the cold waters off Alaska will die if introduced to warm water. One likely reason these shrimp do not survive is that the enzymes in the shrimp will
change shape
#33 Which process is represented by the reaction illustrated in the diagram below
dehydration synthesis
What are the building blocks of lipids?
fatty acids and glycerol
the way a protein molecule is folded determines the shape of the molecule, which determines the
function of that protein
Butter and oil are examples of food composed of
lipids
#17 What do A and B represent?
maltase and lipase
#45 The letters represent different types of
molecular bases
IN what class of organic molecules would hemoglobin, insulin, albumin, and maltase, all of which are composed of chains of amino acids, be placed into?
proteins
even though human proteins are synthesized from only 20 different amino aids, there are thousands of different proteins found in human cells. This great variety of proteins is possible because the
sequence and number of amino acids can be different in each protein
#29 The building blocks for this molecule are (STARCH!!)
simple sugars
2 examples of carbohydrates are
sugars and starches
