BCS 1010 (Biology) FINAL EXAM 1 REVIEW
STUDY QUESTIONS AND ANSWERS WITH
DEFINATIONS.
When the atoms involved in a chemical bond, the electrons are shared,
and one atom is more electronegative, what type of bond results?
✔✔A polar covalent bond
Nonpolar covalent bond
✔✔a covalent bond in which the electrons are shared equally by the two
atoms
polar covalent bond
✔✔A covalent bond in which electrons are not shared equally
A chemical bond can form if two atoms are so unequal in their attraction
for valence electrons that one atom strips an electron completely from the
other, which is called _____________ and that atoms that are positively
charged are called _________________.
✔✔ionic bond; cations
Cations
✔✔positively charged atoms (Plussy cast)
Anions
✔✔negatively charged atoms (Sad Ann)
,What are the three properties of water?
✔✔cohesion, adhesion, surface tension
Cohesion, surface tension, and adhesion are the properties of water
molecules that ___________.
✔✔are a result of hydrogen bonding
chemical equilibrium
✔✔Forward and reverse reactions continue with no net effect on the
concentrations of the reactants and products
If the concentration of hydrogen ions in a solution is 10^-9, the pH of the
solution will be:
✔✔9
pH of a solution
✔✔the negative logarithm of the hydrogen ion concentration
Hydrophobic
✔✔Having an aversion to water; tending to coalesce and form droplets in
water.
Hydrophilic
✔✔Having an affinity for water.
A substance that minimizes changes in concentrations of H+ and OH- in a
solution is called a:
✔✔Buffer
,amino acids hook together by means of ___________ bonds produced via
_____________ to form _______________.
✔✔peptide bonds; dehydration reaction; polypepetides
Polypeptide
✔✔A polymer (chain) of many amino acids linked together by peptide
bonds.
peptide bond
✔✔The chemical bond that forms between the carboxyl group of one
amino acid and the amino group of another amino acid
dehydration reaction
✔✔A chemical reaction in which molecules combine by removing water
Isomers
✔✔Two different molecules that have the same chemical formula
cis isomer
✔✔the two Xs are on the same side
trans isomer
✔✔the two x's are on opposite sides
structural isomers
✔✔changes due to the position of the double bond
, Enantiomers
✔✔isomers that are mirror images of each other
unsaturated fatty acids differ from saturated fatty acids by:
✔✔the presence of carbon-carbon double bonds
Carbohydrates are formed by dehydration reactions involving:
✔✔monosaccharides
Fats (lipids) are produced by combining
✔✔fatty acids and glycerol
Proteins are formed by
✔✔amino acids
Nucleic acids are composed of
✔✔nucleotides
What provides the information necessary to determine a protein's 3-D
shape?
✔✔Sequence of amino acids in the polypeptide chain
Purine bases
✔✔Adenine and Guanine
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller AcademicAllure. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.99. You're not tied to anything after your purchase.