AP Bio Final

which letter shows the potential energy of the product

D

identify the proteins involved in transport

D. big blob

which of the following is not normally found in a plant cell

centrioles

which of the following harvests the most energy during cell respiration

chemiosmosis

which of the following is not related to cell-to-cell communication

countercurrent exchange

which level of protein structure is most directly related to specificity

tertiary

which of the following is an example of a hydrogen bond

the attraction between the oxygen of one water molecule and the hydrogen of an adjacent molecule

which of the following statements about cell respiration is NOT correct

the citric acid cycle produces pyruvate

in 1957, after rigorous testing, a pharmaceutical company in West germany introduced a new drug to the market

the drug contained molecules that were isomers and mirror images of each other. one version worked as expected, while the other caused birth defects

you perform an enzyme-controlled reaction

the enzyme was most active at pH 4.6

each NADH molecule carrying hydrogen to the electron transport chain can produce a maximum of ____ molecules of ATP

3

read the following description of a branched reaction pathway

A-C

identify the structure involved in cell-to-cell communication

A. strand of dots coming off of blob

identify the site of the ATP synthase in the sketch of a mitochondrion shown below

A: the edge of the squiggle blobs

identify the hydrophillic portion of a lipid molecule

B balls

which figure depicts an animal cell placed into a solution hypotonic to the cell

B. big chunk with bite taken out of it, water arrow pointing towards chunk

you tag amino acids with radioactive phosphorus because amino acids are incorporated

ER-Golgi apparatus-vesicles that fuse with plasma membrane

which of the following is NOT correct about NADH and/or FADH2

FADH2 results in the production of more ATP than does NADH

Which of the following statements about a particular molecule is correct and gives your reason for your answer?

H20 is a polar molecule because part of the molecule is positively charged while the remaining part is negatively charged.

Here is a sketch of two amino acids-the building blocks of...which atoms are removed

HOH

glycolysis is the first phase of aerobic cellular respiration it is a complex enzyme-controlled set of reactions in which glucose molecules are broken down...

PFK inhibits the production of ATP when ATP levels are high

which of the following initiates a signal transduction pathway that leads to a response in a cell

a transmembrane receptor changes its conformation

Which of the following is stored in the human liver for energy

glycogen

which of the following probably evolved first

glycolysis

which of the following is correct about signal transduction pathways

in the signal transduction pathway a single molecule can stimulate the release of thousands of molecules of product within a cell

the pH of blood

is normally close to 7.4

which of the following correctly describes the role of cyclic AMP

it acts as a second messenger for signaling molecules that cannot pass through the cell membrane

which of the following is correct about G protein

it is an on-off molecular switch that gets activated by the membrane-bound receptor.

when glucose is broken down in a cell only about 38% of the energy released is captured by the cell for later use. what happens to the rest of the energy

it is lost as heat

bisphenol A is a chemical agent found in many plastics

it mimics the hormone estrogen and causes problems in fetal development even when estrogen is not present in excess

all of the following processes produce ATP except

lactic acid fermentation

here is an equation for a simple enzyme-controlled experiment. what would be the best way to increase the amount of AB produced

lower the activation energy of the reaction

membranes are components of all of the following except a

microtubuole

which organelle contains DNA

mitochondria

you are performing enzyme-controlled reaction A+B+ enzyme... explanation for what substance X is

noncompetitive inhibitor of the enzyme

which of the following most accurately describes the advantage of a signal transduction pathway

one binding molecule can trigger the release of thousands of molecules

clothes washing detergent must be able to remove grease and oil stains from clothing while also dissolving and washing away in the rinse water. Which of the following is the correct structure of the detergent molecules and the correct reason for it?

one end of a detergent molecule is nonpolar in order to dissolve oily stains, while the other end is polar to dissolve in the rinse water.

which model correctly depicts a neutral atom of hydrogen

one proton in middle, one electron in cloud

Which of the following is correct about the role of oxygen during cell respiration

oxygen pulls electrons through the electron transport chain and ultimately bonds with them

after strenuous exercise a muscle cell would contain decreased amounts of ___________ and increased amounts of ______

oxygen; lactic acid

which is an example of a feedback mechanism

phosphofructokinase an allosteric enzyme in glycolysis is inhibited by ATP

the cytoplasmic channels between plant cells are called

plasmodesmata

which of the following is correct about the processes shown

process B produces ATP by substrate level phosphorylation

smooth ER carries out all of the following activites except

produces RNA

proteins are formed in a ribosome as amino acids...what is the best explanation

proper folding of a polypeptide is critical for a protein to function properly

chaperonins are involved with

proper folding of proteins

during cell respiration most ATP is formed as a direct result of the net movement of

protons flowing through a channel

in addition to ATP what is produced during glycolysis

pyruvate and NADH

which of the following is present in a prokaryote cell

ribosomes

signal transduction pathways are complex, involving many different molecules and many steps...

signal transduction pathways offer more opportunity to amplify the signal

which one of the following would not normally diffuse through the lipid bilayer

starch; because it is too large

which of the following choices best describes the reaction below

the potential energy of the reactants is greater than the potential energy of the products

which of the following can be used to determine the rate of an enzyme-catalyzed reaction

the rate of substrate used up

which of the following statements is correct about the reaction shown here

the reaction is an exergonic oxidation reaction

which of the following is not correct about apoptosis

the signals that trigger the process always come from outside the cell that is to die

which of the following requires ATP

the uptake of cholesterol by a cell

which of the following if true about water potential

the water potential inside a cell is positive

isotopes are atoms of a given element that have the same number of protons but vary in the number of neutrons the element carbon has three isotopes

they are chemically identical because they have the same number of electrons

which of the following is correct about protein kinase receptors

they belong to a class of plasma membrane receptors that exhibit enzyme activity

which of the following is correct about receptors that are located in the cytoplasm

they blind to a signal molecule in the cytoplasm which causes a response in the nucleus

all of the following statements are correct about enzymes except

they raise the energy of activation of all reactions

which of the following is correct about chemical signals that bind to receptors located on the cell membrane rather than receptors in the cytoplasm

they require a second messenger

which of the following best characterizes the structure of the plasma membrane

very active

which is true of aerobic respiration but not true of anaerobic respiration

water is produced

one drop each of water and ethyl alcohol... appearance of these two liquids

water molecules exhibit grater cohesion tension than do those of ethyl alcohol

all of the following are characteristics of water except

water molecules have little attraction for each other

which of the following pairs of base sequences could form a short stretch of DNA

5'-TTAA-3'-AATT-5'

what is the approximate size of a human red blood cell

8 micrometers

which of the following is the most important thing that happens during aerobic respiration

ATP is produced

which letter shows the energy of activation for the enzyme-catalyzed reaction

C

you are carrying out an experiment with an enzyme from the human small intestine

add more substrate

which of the following best describes the reaction shown below

an exergonic reaction

the loss of hydrogen or electrons is known as

oxidation