Exam 1 Review Flashcards
What is the most important component of an atom in determining how it reacts with other atoms?
Electrons
The presence of a membrane-enclosed nucleus is a characteristic of-
Eukaryotic
In a single molecule of water, 2 hydrogen atoms are bonded in a single oxygen atom by
Polar covalent bonds
Based on your knowledge of the polarity of water molecules, the solute molecule is most likely…
Positively charged
An example of hydrogen bond is the bond between
a) C and H in methane
b) the H in water molecule
c) Na+ and Cl- in table salt
B
How does one account for the non-polar, hydrophobic nature of fats?
a) fats lack both double and triple bonds
b) the fatty acids are linked to long chained alcohols
c) carboxyl groups are not present in fats
d) carbon and hydrogen atoms share electrons equally
e) glycerol is not water soluble
d) Carbon and hydrogen atoms share electrons equally
If UNT grad takes a position at a pharmaceutical company, they’re doing __________ research.
Applied
Energy typically enters as _____ and exits as ______.
Light, heat
The sum of all chemical reactions in an organism
Metabolism
Non-polar molecules tend to aggregate water because
Hydrophobic interactions
If substance measures 7 on pH scale, the substance has ________ concentration of H+ and OH- ions.
Equal
Margarine is made by hydrogenating vegetable oils so that they take the consistency of butter. WOTF chemical basis change from liquid to solid?
a) fats changed from saturated to unsaturated allowing to solidify
b) fats changed unsaturated to saturated allowing to solidify
c) fats changed from saturated to unsaturated allowing to liquify
d) fats changed unsaturated to saturated allowing to liquify
B
Domains of life in eukaryotic kingdom
Plantae, animalia, fungi, and all other forms of life
Domains of life in prokaryotic kingdom
Bacteria and archae
Scientific law
describes correlation between measured variables (sometimes shown as math equations)
