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BSC 120 - Chapters 2 and 3 Flashcards | StudBud
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BSC 120 - Chapters 2 and 3
BSC 120 - Chapters 2 and 3
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Answers
1
Which of the following elements is most abundant in our bodies?
Oxygen
Carbon
Hydrogen
Water
2
Which of the following bond is typically thought of as "organic chemistry"
C-H
O-H
C-O
N-H
3
Bases are hydrogen acceptors and acids are hydrogen donors
True
False
4
Polar molecules are hydrophillic (water-loving)
False
True
5
Is this molecule polar or nonpolar?
Nonpolar
Polar
6
Which of the following has no charge?
Electrons
Protons
Neutrons
7
(Multiple correct answers) Which of the following bonds would be polar?
O-H
F-H
C-H
C-O
8
Peripheral proteins span the entire cell membrane
False
True
9
How are the 2 individual DNA strands held together?
The sugars bind together through H Bonding
Ionic (charged) interaction
The phosphate groups link together through a phosphodiester bond
The bases H bond together
10
pH measures the presence which of the following?
Fats
H+ ions
OH- ions
Water
11
Only protons and neutrons are found in the nucleus of an atom
False
True
12
Which of the following is an example of an ionic compound (this will likely be the example asked on the exam)?
Glucose
NaCl
O2
H2O
13
What process constructs polymers from monomers?
Glycolysis
Hydrolysis
Dehydration
Lipogenesis
14
Which of the following lipids is characterized by a four-ring structure?
Phospholipids
Waxes
Steroids
Fats
15
What type of isomers are these molecules?
Enantiomers
Structural
16
Covalent bonds can be either polar or nonpolar
True
False
17
(Multiple correct answers) DNA and RNA molecules are differentiated by what?
RNA uses U instead of T
DNA uses U instead of T
The type of sugar used
Differing number of phosphates
18
Which of the following is an atom?
Na
NaCl
19
Which of the following bond types is the strongest (in biology)?
Hydrogen Bonds
Ionic
van der Waals
Covalent
20
Peptide bonds hold proteins together
True
False
21
Phospholipids are amphipathic and make up our bilayered cell membranes
False
True
22
A pH of 9.34 represents an acid
True
False
23
ATP is the body's main source of chemical energy
False
True
24
Which of the following is NOT a class of amino acid side chains?
H-bonded
Polar, uncharged
Polar, charged
Nonpolar
25
Ions have differing numbers of neutrons
True
False
26
Which of the following is NOT one of the four classes of lipids?
Fats
Glucose
Waxes
Steroids
27
What is this macromolecule?
Protein
Triacylglycerol (fat)
Carbohydrate
Phopholipid
28
Is this molecule polar or nonpolar?
Nonpolar
Polar
29
DNA/RNA utilize 4 nitrogenous base pairs
False
True
30
What is the compound responsible for our biological buffer system?
Water
Sodium Chloride
Nitric Acid
Bicarbonate
31
Is this molecule polar or nonpolar?
Polar
Nonpolar
32
The atomic number describes how many protons are in an element
False
True
33
(Multiple Correct Answers) Which of the following sugars are structural?
Glycogen
Chitin
Starch
Cellulose
34
Is this molecule polar or nonpolar?
Polar
Nonpolar
35
Is this base purine or pyrimidine?
Purine
Pyrimidine
36
What is this?
Fat
Amino Acid
Cellulose
Sugar
37
Isomers have the exact same structure, but different chemical formula
False
True
38
Saturated fats have double bonds
False
True
39
What differentiates the amino acids from each other?
Carboxyl Group
Different backbone
Amino group
R Group
40
(Multiple correct answers) Which of the following bonds are intramolecular?
Hydrogen Bonds
Ionic
Covalent
van der Waals
