Briefly describe the fluid mosaic model.
What will be an ideal response?
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Question 2) AB + CD AD + BC is a general example of a(n) _____ reaction.
a) decomposition
b) synthesis
c) exchange
d) reversible
e) catalyzed
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Question 3) All of the following are characteristics of anabolism EXCEPT:
a) It involves synthesizing new biomolecules.
b) It primarily involves endergonic reactions.
c) It releases large amounts of energy.
d) An example of anabolism is linking amino acids together to form proteins.
e) An example is the formation of two ammonia molecules from one nitrogen molecule and three hydrogen molecules.
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Question 4) Which of the following is a general term used to refer to the sum of all the chemical reactions occurring in the body?
a) anabolism
b) catabolism
c) metabolism
d) catalysis
e) homeostasis
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Question 5) In a polar covalent bond, the atom that has the most electronegativity will have a
a) full negative charge (-1).
b) full positive charge (+1).
c) partial negative charge.
d) partial positive charge.
e) neutral charge.
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Question 6) The initial energy investment needed to start a chemical reaction in a cell is called the
a) energy of products.
b) energy of reactants.
c) potential energy.
d) Gibb's free energy.
e) activation energy.
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Question 7) The energy stored in the bonds of the molecules in the foods that humans eat is
1. a form of kinetic energy.
2. a form of potential energy.
3. referred to as chemical energy.
a) 1 only
b) 2 only
c) 3 only
d) 2 and 3
e) All of these choices
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Question 8) A triple covalent bond is formed between atoms sharing _____ valence electrons.
a) one
b) two
c) three
d) six
e) eight
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Question 9) An atom or group of atoms with an unpaired electron in the outermost shell is called a(n)
a) compound.
b) free radical.
c) ion.
d) molecule.
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Question 10) Define mixture and then distinguish between the three types of mixtures called solutions, colloids and suspensions.
What will be an ideal response?
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