Exam Review Questions And Answers
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The bicarbonate buffer system works since the seawater getting too acidic will
form bicarbonate, which is a base and while - ANSWER -help maintain pH
homeostasis.
All the organisms on your campus make up - ANSWER -a community
Which of the following is a correct sequence of levels in life's hierarchy,
proceeding downward from an individual animal? - ANSWER -nervous system,
brain, nervous tissue, nerve cell
Protists and bacteria are grouped into different domains because - ANSWER -
protists have a membrane-bounded nucleus.
A controlled experiment is one that - ANSWER -tests experimental and control
groups in a parallel.
Which of the following best demonstrates unity among all organisms? - ANSWER
-the structure and function of DNA
Which of the following statements correctly describes any chemical reaction that
has reached equilibrium? - ANSWER -The rates of the forward and reverse
reactions are equal.
The reactivity of an atom arises from - ANSWER -the existence of unpaired
electrons in the valence shell.
Total 6 electrons, with 2 in first electron shell and 4 in the second shell. This is the
electron configuration of what element? - ANSWER -Carbon
, The electron configuration of carbon allows for 4 covalent bonds, which makes
carbon excellent - ANSWER -for forming large, complex, and diverse organic
molecules.
Organic molecules consisting of hydrogen and carbon is known as - ANSWER -
hydrocarbons.
Since a great majority of its bonds are relatively nonpolar carbon-to-hydrogen
linkages, hydrocarbon is - ANSWER -hydrophobic.
Which is a hydroxyl group? HINT: (-OH) - ANSWER -
Which is a carbonyl group? HINT: (>C=O) - ANSWER -
Which is an carboxyl group? HINT: (-COOH) - ANSWER -
Which is an Amino group? HINT: (-NH2) - ANSWER -
Which is a sulfhydryl group? HINT: (-SH) - ANSWER -
Which is a phosphate group? - ANSWER -
Compounds that have the same molecular formula pero different structures and
therefore different properties are called - ANSWER -isomers
Carbohydrates, lipids, proteins, and nucleic acids are the 4 major classes of -
ANSWER -macromolecules
The building blocks of polymers are called - ANSWER -monomers.
What is a long molecule consisting of many similar or identical building blocks
called? - ANSWER -polymer
, Monomers are connected by a reaction in which two molecules are bonded to each
other *with the loss of a water molecule* is - ANSWER -dehydration reaction
As Professor Urbunia used to say, to make is to - ANSWER -*dehydrate*
As Professor Urbina also used to say, to break is to - ANSWER -*hydrate*
Polymers are disassembled to monomers by - ANSWER -hydrolysis.
Two monosaccharides joined by a glycosidic linkage is a - ANSWER -
disaccharide
Macromolecules are polymers with a few hundred to a few thousand
monosaccharides joined by glycosidic linkages are - ANSWER -polysaccarides
Which of the following categories includes all others in the list? - ANSWER -
Which of the following is true of unsaturated fats? - ANSWER -
A covalent bond formed between two monosaccharides - ANSWER -glycosidic
linkage
If a protein is transferred from an aqueous solution to a nonpolar solvent such as
chloroform, it is likely that the protein will - ANSWER -denature.
Alteration in pH, salt concentration, or other aspects of the environment can lead
to a protein to - ANSWER -denature
Pentose (five-carbon sugar), nitrogenous base, and one or more phosphate groups
are the 3 major components of a - ANSWER -nucleotide
A sugar to which the nitrogenous base is attached for *RNA* is called - ANSWER
-ribose