AP BIO TEST 1
The most likely explanation for the change in slope of the line between 3 and 5 minutes is ________
*A large amount of the substrate had been consumed* because once it has been consumed the reaction cannot continue
Which of the following pairs of functional groups characterizes the structure of an *AMINO ACID*?
*COOH* and *NH2*
A feature of organic compounds NOT found in inorganic compounds is the presence of...
*carbon atoms covalently bonded* to each other
The pathway for the transformation of cellular energy most likely evolved first from ________
*glycolysis* because it is the starting point for ALL cellular respiration
Which of the following is responsible for the cohesive property of water?
*hydrogen bonds* between the oxygen atoms on one water molecule and a hydrogen atom of another molecule.
Which of the following macromolecules is primarily responsible for the insolubility of cell membranes in water?
*phospholipid* because fats are nonpolar
The pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?
10^-10 M
The nitrogenous base , adenine , is found in which three of the following?
ATP, RNA,and DNA
Which of the following hydrocarbons has a *double bond in its carbon skeleton*?
C2H4
Which of the following methods for *the transport of CO2* provides a *buffering system for blood*?
CO2 combines with H2O to form *carbonic acid* and then *bicarbonate*.
Includes *glycogen, chitin, cellulose and glucose*
Carbohydrates!
Which of the following is the most abundant carbon-containing compound in the atmosphere?
Carbon Dioxide!
The site of glucose synthesis is in the ________
Chloroplasts
*Steroid* affecting the fluidity of the plasma membrane
Cholesterol
Essential for synthesis of fats
Gly*cerol*
A storage form of of carbohydrates in muscle
Gly*cogen*
A nitrogen base of nucleic acids
Guanine
Most likely to be broken during replication
Hydrogen bonds
The final electron acceptor for cellular respiration is _________
Oxygen
*Pepsin*, digestive *enzyme* produced in mammalian stomachs
Protein
Animals produce most of their nitrogen-containing wastes during?
Protein digestion
Which of the following is an example of a hydrogen bond?
The attraction of the *hydrogen of one water molecule* *to the oxygen of another molecule*
The movement of water to the top of a 15 meter tree is best explained by
Transpiration and Cohesion
The major component of the bilayer of a cell membrane is the
phospholipid
The structural level of a protein least affected by a disruption in hydrogen bonding is the:
primary level
Many mammals control their body temperature by sweating; which property of water is most directly responsible for the ability of sweat to lower body temperature?
the *absorption of heat* by *breaking* of hydrogen bonds
Which of the following is a correct statement about the relationship between pH and the hydrogen-ion concentration of a solution?
the concentration of hydrogen ions in a solution with a pH of 7.0 is 100 times as great as that in a solution with a pH of 9.0
An example of active transport across a membrane is ___
the movement of Na+ into a neuron as a *nerve impulse is generated*