Exam 1 Review Flashcards

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1
Q

What is the most important component of an atom in determining how it reacts with other atoms?

A

Electrons

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2
Q

The presence of a membrane-enclosed nucleus is a characteristic of-

A

Eukaryotic

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3
Q

In a single molecule of water, 2 hydrogen atoms are bonded in a single oxygen atom by

A

Polar covalent bonds

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4
Q

Based on your knowledge of the polarity of water molecules, the solute molecule is most likely…

A

Positively charged

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5
Q

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

A

B

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6
Q

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

A

d) Carbon and hydrogen atoms share electrons equally

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7
Q

If UNT grad takes a position at a pharmaceutical company, they’re doing __________ research.

A

Applied

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8
Q

Energy typically enters as _____ and exits as ______.

A

Light, heat

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9
Q

The sum of all chemical reactions in an organism

A

Metabolism

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10
Q

Non-polar molecules tend to aggregate water because

A

Hydrophobic interactions

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11
Q

If substance measures 7 on pH scale, the substance has ________ concentration of H+ and OH- ions.

A

Equal

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12
Q

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

A

B

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13
Q

Domains of life in eukaryotic kingdom

A

Plantae, animalia, fungi, and all other forms of life

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14
Q

Domains of life in prokaryotic kingdom

A

Bacteria and archae

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15
Q

Scientific law

A

describes correlation between measured variables (sometimes shown as math equations)

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16
Q

Scientific theory

A

Exploration of natural phenomena

17
Q

Hydrocarbons

A

Organic molecules consisting of only carbon and hydrogen+