H Biology Chapter 2 2/2

Biology honors exam prep

30 cards   |   Total Attempts: 182
  

Cards In This Set

Front Back
ATOMS ARE COMPOSED OF...
A-protons with a positive charge
B-neautrons no charge
C-electrons with a negative charge
D-all of the above
D- all of the above
A SUBSTANCE THAT IS COMPOSED OF ONLY ONE TYPE OF ATOM IS CALLED A(N)...
A-nucleus
B-cell
C-atoms
D-carbon
C-element
ALL MATTER IN THE UNIVERSE IS COMPOSED OF...
A-cells
B-molecules
C-atoms
D-carbon
C-atoms
THE ELECTRONS OF AN ATOM...
A-are found in the nucleus along with the protons
B-orbit the nuclues in various energy levels
C-have a positive charge
D-are attracted to the positive charge of neutrons
B-orbit the nucleusin various energy levels
ATOMS THAT HAVE GAINED ENERGY...
A-have protons and neutrons that move farther apart
B-lose neutrons from the nucleus
C-have electrons that move to higher energy levels
D-absorb electrons into the nucleus
C-have electrons that moce to higher energy levels
WHICH OF THE FOLLOWING STATES OF MATTER CONTAIN(S) PARTICLES THAT ARE TIGHTLY LINKED TOGETHER IN A DEFINITE SHAPE?
A-solid
B-liquid
C-gas
D-solid and liquid
A-solid
BECAUSE CARBON HAS FOUR ELECTRONS IN ITS OUTER ENERGY LEVEL...
A-it can form bonds with carbon atoms only
B-these atoms are naturally chemically stable
C-it can react with up to four other atoms to form covalent bonds
D-it cannot react with anything other than organic molecules
C-it can react with up to four other atoms to form covalent bonds
THE BOND FORMED WHEN TWO ATOMS SHARE A PAIR OF ELECTRONS IS CALLED A...
A-hydrogen bond
B-nonpolar bond
C-covalent bond
D-water bond
C-covalent bond
AN ATOMS THAT HAS GAINED OR LOST ELECTRONS IS CALLED A(N)...
A-molecule
B-nucleon
C-ion
D-element
C-ion
WHICH OF THE FOLLOWING STATEMENTS MOST ACCURATLEY DESCRIBES THE DIFFERENCE BETWEEN AN IONIC BOND AND A COVALENT BOND?
A-atoms held together by ionic bonds seperate when placed in water, while atoms held together by covalent bonds do not seperate in water
B-ionic bonds hold together atomsof two different types, while covalent bonds hold together atoms of the same type
C-electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond
D-ionic bonds form between atoms that carry opposite charges, while covalent bond form between uncharged atoms
C-electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond
Question 11
REACTION THREE IN THE GRAPH...
A-probably occured in the prescence of a catalyst
B-requires a greater activation energy that reaction 2
C-is the same as reaction 1, but faster
D-takes longer than reaction 2
A-probably occured in the prescence of a catalyst
Question 12
WHICH OF THESE STATEMENTS REGARDING THE GRAPH IS TRUE?
A-reaction 2 occurs faster than reaction 3 because reaction 2 requires more energy than reaction 3
B-the difference in the graphs shown for reaction 2 and reaction 3 is due to a difference in the activation energy needed for these reactions
C-reactant X contains more energy at the beginninf of the reaction than product Z has after the reaction
D-all of the above
B- the difference in the graphs shown for reaction 2 and reaction 3 is due to a difference in the activation energy needed for these reactions
CHANGING THE COURSE OR PATHWAY OF A CHEMICAL REACTION SO THAT IT REQUIRES LESS ACTIVATION ENERGY...
A-is a violation of the laws of nature
B-requires higher temperatures than those found with in cells
C-occurs only when reactants are quickly added to the reaction mixture
D-is accomplished by the action of catalysts on reactants
D-is accomplished by the action of catalysts on reactants
ENZYMES...
A-are able to heat up molecules so that they can react
B-provide CO2 for chemical reactions
C-are biological catalysts
D-absorb excess heat so that reactions occur at low temperatures
C-are biological catalysts
A SINGLE ORGANISM MAY CONTAIN...
A-thousands of different enzymes, each one specific to a different chemical reaction
B-one enzyme that plays a role in thousands of different chemical reactions
C-approximately 100 kinda of enzymes, each one specific to a different chemical reaction
D-one enzyme that is specific to photosynthesis and one enzyme specific to cellular respiration
A-thousands of different enzymes, each one specific to a different chemical reaction