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Biology > Test 1 > Flashcards

Test 1 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

What are the basic building blocks of DNA?

A

4 nucleotides

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2
Q

Which functional group forms string covalent bonds called bridges that stabilize protein tertiary structures?

A

Sulfhydryl

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3
Q

A compound contains hydroxyl groups as its predominate functional group. Which is true concerning this compound?

A

It should dissolve in water

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4
Q

If 3 molecules of a fatty acid have the formula C16H32O2 are joined to a molecule of a glycerol C3H8O3 to make a triglyceride then the resulting molecule would have the formula

A

C51H98O6

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5
Q

The energy used to vaporize water does what?

A

It breaks down hydrogen bonds between water molecules

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6
Q

Glucose and galactose represent what?

A

Represent structural isomers

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7
Q

What maintains the secondary structure of a protein?

A

Hydrogen bonds

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8
Q

Waters high specific heat is the consequence of

A

Absorption and release of heat calories when hydrogen bonds break and form, respectively

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9
Q

We can be sure that a mole of sucrose and a mile of glucose are equal in their

A

Number of molecules

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10
Q

A solution of PH 6 contains ____ than the same amount of solution at PH 9

A

1000 times more H+

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11
Q

How would 1 make a 0.5 M solution of a 75 gram molecule?

A

Dissolve 37.5 grams with enough H20 to yield 1 liter of solution

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12
Q

How many electrons can carbon have?

A

10

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13
Q

Which molecule has a kink in it?

A

Unsaturated fatty acid

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14
Q

How many structural isomers are possible for the compound C4H10?

A

2

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15
Q

Why does ice float in liquid water?

A

Hydrogen bonds keep the molecules of H20 in ice farther apart than in liquid

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16
Q

Human sex hormones are classified as

A

Lipids

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17
Q

A given solution is found to contain 0.0001 likes of hydrogen ions (H+) per liter. What best describes this solution if added to distilled water?

A

Acidic: H+ released to H20

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18
Q

When an ice cube cools an 8 oz glass of liquid beverage by 1 degree Celsius, what is true?

A

Kinetic energy in the liquid beverage decreases

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19
Q

The body of a vertebrate like you would be composed of from 65-80 percent

A

Water

20
Q

Which is not a protein?
-hemoglobin
-antibodies
-collagen
-enzymes
-DNA
-lysosome

A

DNA 🧬

21
Q

Which binds form the primary structure of a protein?

A

Peptide bonds

22
Q

In the double helix structure of a nucleic acid, cytosine will hydrogen bond to

A

Guanine

23
Q

Which type of lipid is most important in cell membranes?

A

Phospholipids

24
Q

Which of these hydrocarbons could have a double bond in its carbon skeleton?

A

C5H10

25
Q

Most categories of large organic molecules are assembled by polymerization of a few kinds of simple subunits called monomers. What is an exception to the above statement?

A

Steroids

26
Q

What ionized completely in solution and is therefore a strong acid?

A

HCI

27
Q

What represents a correct statement about cellulose and starch?

A

They differ in the type of glucose from which they’re made

28
Q

Which levels in the hierarchy of biological organization I Clyde all of the other levels in the list as nested subunits within it?
-organelles
-biological molecules
-cells
-atoms
-tissues

A

Tissues

29
Q

You have a neutral atom that has an atomic number of 8. According to the stem ent you know that this atom will contain

A

8 protons and 8 electrons

30
Q

What is the maximum number of covalent bonds an element with atomic number 16 can make with hydrogen atoms?

A

2

31
Q

Which atoms has the same valence as carbon?
7 nitrogen
9 fluorine
10 neon
12 magnesium
14 silicone

A

14 silicone

32
Q

What bonds are easily disrupted in the presence of water?

A

Ionic

33
Q

What best describes the relationship between the 3 atoms?
1H
2H
3H

A

All are isotopes of hydrogen

34
Q

The maximum number of electrons in the Is orbital is

A

2

35
Q

Blueberries grow best in the moderately acidic soil. What is an appropriate pH of a soil that is good for growing blueberries?

A

4.8

36
Q

What best describes chemical equilibrium?

A

Reactions continuing with no effect on the concentrations of reactants and products

37
Q

What results when an electron is transferred from atom to another?

A

Ionic bond

38
Q

True or false about water:
Compared to most liquids, the evaporation of water requires a large amount of heat

A

True

39
Q

About what temperature is water at its densest state?

A

4 degrees Celsius

40
Q

For what reason are hydrocarbons not soluble in water?

A

They are non-polar compounds

41
Q

What determines the cohesiveness of water molecules?

A

Water’s polarity

42
Q

The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of

A

Side chains (R groups)

43
Q

Polysaccharides, nucleic acids, and proteins are similar in that they

A

Are synthesized from monomers by the process of dehydration reactions

44
Q

The element nitrogen is present in all except

Proteins
Nucleic acids
Amino acids
DNA
monosaccharides

A

Monosaccharides

45
Q

A 1M glycerol solution would contain how many glycerol (C3H8O3) molecules?

A

6.02 x 10^23

46
Q

Ambient air temperature usually increases when water condenses and forms water droplets. Which behavior of water is most directly responsible for this phenomenon?

A

Release of heat by the formation of hydrogen bonds

Biology (33 decks)

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