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Final

BSC 1010 Chapter Notes - Chapter 2: Mass Number, Electron Shell, Dehydration ReactionExam


Department
Biological Science
Course Code
BSC 1010
Professor
Thomas Patzer
Study Guide
Final

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BSC 1010
Chapter Two
Review Questions
1.
An acid __________.
is a chemical that adds hydrogen ions
to a solution.
2.
The atomic mass number is defined as the total
number of _______ in an atom.
protons and neutrons
3.
The atomic number of carbon (C) is 6. If this is
a neutral atom, how many electrons does
carbon have?
6
4.
An atom's outermost electron shell
determines its chemical reactivity.
5.
A base (alkali) __________.
is a chemical that absorbs hydrogen
ions from a solution.
6.
The chemical reaction called ______ builds
Sucrose from glucose and fructose.
dehydration synthesis
7.
An element is found to have atoms with eight
electrons in its valence shell. The atoms will be
____
chemically stable and nonreactive, or
inert..
8.
Examples of the monosaccharides are
__________.
glucose, ribose, and fructose.
9.
The first energy shell of an atom contains a
maximum of ________ electron(s).
two
10.
The four major groups of organic compounds
are
carbohydrates, lipids, proteins, and
nucleic acids.
11.
The four nitrogen bases found in DNA are
__________.
adenine, thymine, cytosine, and
guanine
12.
The four nitrogen bases found in RNA are
__________.
adenine, cytosine, guanine, and uracil.
13.
How many electron pairs does carbon share in
order to complete its valence shell?
4
14.
How many electron shells does calcium (Ca)
have, if its atomic number is 20?
4
15.
Hydrophobic substances such as the vegetable
oil are __________.
nonpolar substances that repel water
molecules.
16.
In a covalent bond, atoms __________.
share electrons to complete their
outermost shell
17.
In an ionic bond, __________.
atoms, having gained or lost electrons,
attract one another with opposite
charges.
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18.
In living cells, during the hydrolysis reaction,
__________.
water is used to break a covalent bond.
19.
the interaction of water molecules with one
another involves the use of _________.
hydrogen bonds
20.
An ion is an atom of an element that has what?
A net negative or positive charge, with
number of electrons different from
number of protons.
21.
Isotopes of an element differ in their _____.
neutron number
22.
The joining of two adjacent amino acids is by
a/an __________.
peptide bond.
23.
Organic molecules are defined as the chemical
compounds that contain __________.
carbon and hydrogen
24.
Oxygen (O) is much more electronegative than
hydrogen (H).
Which of the following statements is correct
about the atoms in water (H2O)?
A) Each hydrogen atom has a partial positive
charge.
B) The oxygen atom has a strong positive
charge.
C) Each hydrogen atom has a slight negative
charge.
D) The oxygen atom has a partial positive
charge.
E) There are covalent bonds between the
hydrogen atoms.
Each hydrogen atom has a partial
positive charge.
25.
The primary building block (monomer) of
nucleic acids is __________.
nucleotides
26.
The primary building block (monomer) of the
proteins is __________.
an amino acid.
27.
The sequence of amino acids in a protein is
called the __________.
primary structure.
28.
The sex hormone, Testosterone is a __________.
steroid
29.
Some insects can stride on the surface of water
because water __________.
has surface tension due to Cohesion.
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