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Biology 1107 Exam 1

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50 practice questions to simulate the real exam.
Alison Chase
Quiz by Alison Chase, updated more than 1 year ago
Alison Chase
Created by Alison Chase almost 6 years ago
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Question 1

Question
What are the four types of atoms that make up 96% of all matter found in organisms?
Answer
  • hydrogen, carbon, nitrogen, and oxygen
  • hydrogen, carbon, oxygen, and sulfur
  • hydrogen, oxygen, nitrogen, and phosphorus
  • hydrogen, oxygen, phosphorus, and sulfur

Question 2

Question
What types of molecules have hydrophilic interactions?
Answer
  • polar
  • non polar
  • ionic
  • polar and ionic
  • non polar and ionic
  • all of the above

Question 3

Question
Why is it that diving bell spiders do not drown when on water?
Answer
  • surface tension
  • water resists forces that increase it surface area
  • cohesion
  • surface tension and cohesion
  • all of the above

Question 4

Question
Which has greater potential energy?
Answer
  • short bonds like that found in a hydroxyl group
  • strong bonds
  • long bonds like that found between carbon and hydrogen
  • weak bonds
  • short bonds like that found in a hydroxyl group and strong bonds
  • long bonds like that found between carbon and hydrogen and weak bonds
  • all of the above

Question 5

Question
Organic molecules means...
Answer
  • molecules that contain carbon
  • octane
  • molecules that contain water
  • molecules that contain carbon and octane
  • all of the above

Question 6

Question
How amino acids make up the building blocks of proteins?
Answer
  • 10
  • 20
  • infinite
  • 50

Question 7

Question
What makes proteins different from one another
Answer
  • hydrophilic interactions
  • R-groups
  • amino group
  • carboxyl group
  • amino and carboxyl group

Question 8

Question
Monomers polymerize through...
Answer
  • condensation reactions
  • hydrolysis
  • dehydration reactions
  • condensation and dehydration reactions

Question 9

Question
What are the three main components of a peptide-bonded backbone?
Answer
  • R-group orientation
  • Directionality
  • Flexibility
  • R-group orientation and flexibility
  • all of the above

Question 10

Question
What is the secondary structure of proteins?
Answer
  • the unique sequence of amino acids
  • combinations of polypeptides
  • interactions between residues that are brought together as the chain bends and folds in space
  • created by the interactions between functional groups

Question 11

Question
Molecular chaperones do the following...
Answer
  • denatures proteins
  • facilitate protein folding
  • recognize unfolded proteins by binding to hydrophobic patches that are not normally exposed
  • unfolds proteins
  • denatures proteins and unfolds proteins
  • facilitate protein folding and recognize unfolded proteins by binding to hydrophobic patches that are not normally exposed

Question 12

Question
Which of the following describes enzymes?
Answer
  • "lock and key"
  • catalyze reactions
  • all of the above
  • none of the above
  • Fischer's model

Question 13

Question
Which of the following describes the sugar present in a nucleotide?
Answer
  • 4' carbon sugar
  • 6' carbon sugar
  • 5' carbon sugar
  • none of the above

Question 14

Question
Which of the following are pyrimidines?
Answer
  • cytosine
  • uracil
  • adenine
  • guanine
  • cytosine and uracil
  • adenine and cytosine

Question 15

Question
Which term describes the bond that polymerizes nucleic acids?
Answer
  • glycosidic linkages
  • peptide bonds
  • phosphodiester bonds
  • none of the above

Question 16

Question
Which of the following is not true of DNA?
Answer
  • tertiary structure follows the Watson-Crick pairing
  • has ribose as its sugar
  • has an antiparallel structure
  • none of the above

Question 17

Question
Which term describes this picture?
Image:
1200px Stem Loop (binary/octet-stream)
Answer
  • polypeptide
  • DNA
  • RNA
  • steroid

Question 18

Question
Which of the following means "many-sugars?"
Answer
  • monomers
  • monosaccharides
  • polysaccharides
  • oligosaccharides

Question 19

Question
Which of the following is a ketose?
Answer

Question 20

Question
Which of the following describes the chemical structure of starch?
Answer
  • contains alpha-glucose joined by glycosidic linkages
  • amylose and amylopectin
  • both alpha 1,4 glycosidic linkages and alpha 1,6 glycosidic linkages
  • contains alpha-glucose joined by glycosidic linkages and both alpha 1,4 glycosidic linkages and alpha 1,6 glycosidic linkages
  • all of the above

Question 21

Question
Which of the following describes a glycoprotein?
Answer
  • is a protein that is linked to a carbohydrate
  • protein that is linked to a oligosaccharides
  • spans the glycolipid
  • all of the above
  • none of the above

Question 22

Question
Highly unsaturated lipids are _____ at room temperature
Answer
  • solid
  • partially solid
  • partially liquid
  • liquid

Question 23

Question
What is the commonality shared between micelles and lipid bilayers?
Answer
  • They are both circular in formation
  • They are both linear in formation
  • Both have hydrophobic tails facing one another
  • Both have hydrophobic heads facing one another

Question 24

Question
Lipid bilayer with short and unsaturated hydrocarbon tails have...
Answer
  • lower permeability
  • lower fluidity
  • higher permeability

Question 25

Question
The following statement describes which: As water leaves, the vesicle shrinks and the membrane shrivels.
Answer
  • hypotonic
  • hypertonic
  • isotonic
  • none of the above

Question 26

Question
Exergonic reactions have the following qualities...
Answer
  • delta G is less than zero
  • delta G is greater than zero
  • delta G is equal to zero

Question 27

Question
Phosphorylation is when...
Answer
  • addition of a phosphate group to a substrate
  • removal of a phosphate group to a substrate
  • none of the above

Question 28

Question
The following characteristics represent an "induced fit":
Answer
  • reorients the substrates and bind them tighter to the active site
  • conformational change of the active site
  • when substrate and active site collide in precise orientation
  • reorients the substrates and bind them tighter to the active site and conformational change of the active site

Question 29

Question
Which of the following describes feedback inhibition?
Answer
  • when the concentration of a product molecule becomes rare
  • when the concentration of the product molecule becomes abundant
  • "feeds back" to stop reaction sequence
  • "feeds back" to stop product sequence
  • when the concentration of the product molecule becomes abundant and "feeds back" to stop reaction sequence
  • when the concentration of a product molecule becomes rare and "feeds back" to stop reaction sequence

Question 30

Question
Which of the following does not occur during glycolysis?
Answer
  • one five-molecule carbon molecule of glucose is broken down
  • glucose is broken down into two molecules of three-carbon pyruvate
  • NAD+ is reduced to form NADH
  • ATP is produced from ADP and Pi

Question 31

Question
Which of the following is not true about the citric acid cycle?
Answer
  • each acetyl CoA is oxidized to two molecules of CO2
  • each acetyl CoA is reduced to two molecules of CO2
  • more ATP and NADH is produced
  • FAD is reduced to form FADH2

Question 32

Question
Lactic acid fermentation
Answer
  • regenerates NAD+ by forming lactate
  • yeast converts pyruvate to the two-carbon compound acetaldehyde
  • both of the above
  • none of the above

Question 33

Question
Protein conformation is generally not obtained until the
Answer
  • primary level
  • secondary level
  • tertiary level
  • quaternary level

Question 34

Question
Which of the following hydrocarbons has a double bond in its carbon skeleton?
Answer
  • C3H8
  • C2H6
  • C2H4
  • CH4

Question 35

Question
Acids in solution
Answer
  • donate OH ions
  • donate H ions
  • can remove OH ions
  • donate OH ions and can remove OH ions
  • donate H ions and can remove OH ions

Question 36

Question
The fact that lipids are high in potential energy is due to the
Answer
  • multiple carbon to hydrogen bonds
  • solubility of each glycerol molecule
  • the number of oxygen to hydrogen bonds
  • the number of oxygen to carbon bonds

Question 37

Question
The amino group can functionally
Answer
  • act as an acid
  • cause solutions to gain a sour taste
  • act as a base
  • none of the above apply

Question 38

Question
The chemical behavior of amino acids is primarily due to
Answer
  • the nature of the N terminis
  • the nature of the C terminis
  • the R group
  • none of the above

Question 39

Question
A triple bond between two atoms would involve the sharing of
Answer
  • 2 electrons
  • 3 electrons
  • 8 electrons
  • 6 electrons

Question 40

Question
The monomers that construct primary proteins are
Answer
  • simple sugars
  • lipids
  • amino acids
  • polypeptides

Question 41

Question
The atomic number of an atom is 12. The number of valence electrons is
Answer
  • 4
  • 3
  • 2
  • none of the above

Question 42

Question
Tertiary structures are more rigid than secondary protein structures because
Answer
  • the number and type of possible chemical bonds increases
  • the bond length in hydrogen bonds increases
  • the bond length in hydrogen bonds decreases
  • the number and type of possible chemical bonds increases and the bond length in hydrogen bonds decreases
  • none of the above would apply

Question 43

Question
Most complex carbohydrates are constructed from
Answer
  • amino acids
  • lipids
  • monosaccharides
  • glycogen

Question 44

Question
Enzymes can regulate/influence the amount of energy required for a chemical reaction to proceed
Answer
  • by lowering the activation energy
  • decreasing the randomness of molecular formation
  • increasing the randomness of molecular formation
  • by lowering the activation energy and decreasing the randomness of molecular formation
  • by lowering the activation energy and increasing the randomness of molecular formation

Question 45

Question
weak acids typically dissociate
Answer
  • partially
  • completely
  • not at all

Question 46

Question
glycogen is a
Answer
  • monosaccharides stored in animals
  • monosaccharides stored in plants
  • polysaccharides stored in animals
  • polysaccharides stored in plants

Question 47

Question
the hydrophobic end of a protein would
Answer
  • readily not dissolve in water
  • readily dissolve in water
  • make the solution acidic
  • none of the above is true

Question 48

Question
if the concentration of H+ ions and OH- ions in solution is equal, then the pH will be
Answer
  • acidic
  • neutral
  • basic
  • strongly acidic
  • strongly basic

Question 49

Question
The 5' --> 3' linear directionality of a DNA polymer is established
Answer
  • when the 5' carbon and its phosphate group of a proceeding nucleotide attaches to the 3' carbon of the preceding nucleotide.
  • only in the anti-parallel strand of DNA
  • when the nitrogenous bases form hydrogen bonds
  • none of the above are correct

Question 50

Question
a pyruvate molecule contains
Answer
  • 1 carbon atom
  • 3 carbon atoms
  • 6 carbon atoms
  • 2 carbon atoms
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