Bio 256 study guide exam questions
with complete answers
which statement is not true regarding necessary life functions - Answer-each organ
system is isolated from all other body systems
which of the following statements is true concerning feedback mechanisms - Answer-
negative feedback mechanisms work to prevent sudden severe changes within the body
which would be a norma measure of total lipids in venous blood - Answer-500 mg/100ml
most often, the integration center in a feedback loop will be located within the - Answer-
central nervous system
any water not contained within the cells is said to be part of the body _____
compartment - Answer-extracellular
why does your Brian require a constant blood flow, even during stress, such as with
intense exercise - Answer-to maintain consciousness
which is a less common element of the human body - Answer-iron
which is an organic molecule - Answer-O2
what does NOT - Answer-dissolve triglycerides
a salt such as NaCl becomes forms ______ when dissolved in water - Answer-
electrolytes
a base is defined as any molecule that can - Answer-remove protons from a solution (it
is a proton acceptor)
if solution A has 100 times the hydrogen ions as solution B and solution B has a pH of
6.0, then solution A will have a pH equal to - Answer-4.0
buffers keep _____ constant in our bodies - Answer-pH
a molecule that is a mirror image of another, having a key functional group oriented in a
different direction, is called ____ of the other - Answer-a stereoisomer
which is the unite molecule of glycogen - Answer-glucose
which of the following is a polysaccharide - Answer-starch
, which is a molecule with one carbon atoms of its glycerol backbone attached to a
phosphate group and an alcohol while the two other glycerol carbon atoms are attached
to fatty acids - Answer-phospholipid
monounsaturated fatty acids have ___ double bond - Answer-1
which is NOT a part of an amino acid - Answer-ribose
the overall molecular shape of a globular protein consisting of a single polypeptide
strand is known as its - Answer-tertiary structure
enzymes are _____ proteins - Answer-globular
which is NOT a function of proteins - Answer-provides genetic code
when complementary bas pairing occurs in DNA - Answer-adenine pairs with thymine
RNA is mad by _____; protein is made by ______ - Answer-transcription, translation
which is the RNA that brings amino acids to the ribosome where protein is made -
Answer-tRNA
transfer RNA molecules come onto the ribosome in the order directly dictated by
_______ - Answer-mRNA
if you see polyribosomes when you observe a cell using an electron microscope, the
cell - Answer-is making a lot of a certain protein
which is NOT a reason why you and your cells age? - Answer-genes shorten until they
no longer function
which is NOT a primary function of membranes - Answer-energy storage
the main exergonic reaction that drives most of the body's endergonic reactions is the -
Answer-hydrolysis of ATP
the "lock-and-key model" of enzyme function describes the - Answer-specific fit of a
substrate to its particular enzyme
phenylketonuria (PKU) occurs when there is - Answer-a hereditary defect in an enzyme
an atom or molecule has been oxidized when - Answer-it has lost some of its electrons
all of the following are formed as a result of the electron-transport chain except -
Answer-carbon dioxide
with complete answers
which statement is not true regarding necessary life functions - Answer-each organ
system is isolated from all other body systems
which of the following statements is true concerning feedback mechanisms - Answer-
negative feedback mechanisms work to prevent sudden severe changes within the body
which would be a norma measure of total lipids in venous blood - Answer-500 mg/100ml
most often, the integration center in a feedback loop will be located within the - Answer-
central nervous system
any water not contained within the cells is said to be part of the body _____
compartment - Answer-extracellular
why does your Brian require a constant blood flow, even during stress, such as with
intense exercise - Answer-to maintain consciousness
which is a less common element of the human body - Answer-iron
which is an organic molecule - Answer-O2
what does NOT - Answer-dissolve triglycerides
a salt such as NaCl becomes forms ______ when dissolved in water - Answer-
electrolytes
a base is defined as any molecule that can - Answer-remove protons from a solution (it
is a proton acceptor)
if solution A has 100 times the hydrogen ions as solution B and solution B has a pH of
6.0, then solution A will have a pH equal to - Answer-4.0
buffers keep _____ constant in our bodies - Answer-pH
a molecule that is a mirror image of another, having a key functional group oriented in a
different direction, is called ____ of the other - Answer-a stereoisomer
which is the unite molecule of glycogen - Answer-glucose
which of the following is a polysaccharide - Answer-starch
, which is a molecule with one carbon atoms of its glycerol backbone attached to a
phosphate group and an alcohol while the two other glycerol carbon atoms are attached
to fatty acids - Answer-phospholipid
monounsaturated fatty acids have ___ double bond - Answer-1
which is NOT a part of an amino acid - Answer-ribose
the overall molecular shape of a globular protein consisting of a single polypeptide
strand is known as its - Answer-tertiary structure
enzymes are _____ proteins - Answer-globular
which is NOT a function of proteins - Answer-provides genetic code
when complementary bas pairing occurs in DNA - Answer-adenine pairs with thymine
RNA is mad by _____; protein is made by ______ - Answer-transcription, translation
which is the RNA that brings amino acids to the ribosome where protein is made -
Answer-tRNA
transfer RNA molecules come onto the ribosome in the order directly dictated by
_______ - Answer-mRNA
if you see polyribosomes when you observe a cell using an electron microscope, the
cell - Answer-is making a lot of a certain protein
which is NOT a reason why you and your cells age? - Answer-genes shorten until they
no longer function
which is NOT a primary function of membranes - Answer-energy storage
the main exergonic reaction that drives most of the body's endergonic reactions is the -
Answer-hydrolysis of ATP
the "lock-and-key model" of enzyme function describes the - Answer-specific fit of a
substrate to its particular enzyme
phenylketonuria (PKU) occurs when there is - Answer-a hereditary defect in an enzyme
an atom or molecule has been oxidized when - Answer-it has lost some of its electrons
all of the following are formed as a result of the electron-transport chain except -
Answer-carbon dioxide
