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Launchpad Quiz Questions with 100% Complete Answers.
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Launchpad Quiz Questions with 100% Complete Answers.Launchpad Quiz Questions with 100% Complete Answers.
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Launchpad Quiz Questions with 100% CompleteAnswers.
Hydrogen bonds - Correct Answers form weak interactions but can provide structural
stability when many are found in a single molecule
Which of the elements listed below requires two additional electrons to fill the outermost
electron shell? - Correct Answers Oxygen
The difference between an acid and a base is that an acid _______, whereas a base
_______. - Correct Answers releases H+ ions in solution; accepts H+ ions
Which characteristic of water contributes most to the relatively constant temperatures of
the oceans? - Correct Answers water has a high specific heat
Which of the following pairs has similar chemical properties? - Correct Answers 12C
and 14C
Hydrogen bonds are attractions - Correct Answers between atoms each with partial
electrical charges
A covalent bond is formed by the sharing of _______ between atoms, whereas an ionic
bond is formed by the _______. - Correct Answers electrons; transfer of electrons from
one atom to another
Why is the pH of a 0.1 M solution of acetic acid in water higher than that of a 0.1 M
solution of Hall in water? - Correct Answers the acetic acid does not fully ionize in water,
whereas Hall does.
For a covalent bond to be polar, the two atoms that form the bond must have - Correct
Answers differing electronegativity’s
The atomic number of an element is the same as the number of _______ in each atom.
- Correct Answers protons
The optimum soil pH for growing blueberries is 4.5, whereas the optimum soil pH for
growing strawberries is 6.5. Therefore, the number of hydrogen ions needed to grow
blueberries is _______ times the number needed for strawberries. - Correct Answers
100
Propane (CH3—CH2—CH3), is considered a nonpolar molecule because it - Correct
Answers has more attraction to other propane molecules than water.
The reactivity of an atom arises from the - Correct Answers presence of unpaired
electrons in the outermost electron shell or valence shell
, Which of the following properties of water contributes most to the ability of fish in lakes
to survive very cold winters? - Correct Answers Frozen water is less dense than liquid
water.
Starch and glycogen, which are both polysaccharides, differ in their functions in that
starch is _______, whereas glycogen _______. - Correct Answers the principle energy
storage compound of plants; is the main energy storage of animals
Molecules that are both attracted to water and repel water are called - Correct Answers
amphipathic
Quaternary structure of proteins refers to - Correct Answers the number and kind of
polypeptide subunits the protein has
Which of the following functional groups is found in the R group of the amino acid
cysteine? - Correct Answers —SH
Which of the following amino acids (see Table 3.2) would, when incorporated into a
polypeptide chain (not at the N or C terminus), make the charge of the polypeptide more
positive? - Correct Answers Arginine
In condensation reactions, the atoms that make up a water molecule are derived from -
Correct Answers both reactants
Lipids are - Correct Answers - insoluble in water
- Important for energy storage
- Hydrophobic
- Important constituents of biological membranes
Which of the following is not a correct monomer/polymer pairing? - Correct Answers
Glucose/cellulose
Amino and carboxyl functional groups tend to form bases and acids by gaining or losing
- Correct Answers a proton.
Glucose and fructose both have the formula C6H12O6, but the atoms in these two
compounds are arranged differently. Glucose and fructose are therefore - Correct
Answers isomers
Starch and glycogen, which are both polysaccharides, differ in their functions in that
starch is _______, whereas glycogen _______. - Correct Answers the principle energy
storage compound of plants; is the main energy storage of animals
Which of the following is not a correct monomer/polymer pairing? - Correct Answers
Cholesterol/triglyceride
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