Copiar y Editar

Exam 1

Descripción

Chapters 2 and 3
Deana Heitkamp
Test por Deana Heitkamp, actualizado hace más de 1 año
Deana Heitkamp
Creado por Deana Heitkamp hace alrededor de 5 años
48
0
0

Resumen del Recurso

Pregunta 1

Pregunta
The compounds above is a(n)
Image:
Saturated Fat Molecular Structure 1 (binary/octet-stream)
Respuesta
  • Phospholipid
  • saturated fatty acid
  • unsaturated fatty acid
  • triglyceride

Pregunta 2

Pregunta
Phosphorus (P) has an atomic number of 15. How many unpaired electrons are in its outer shell?
Respuesta
  • 1
  • 2
  • 3
  • 4
  • 5

Pregunta 3

Pregunta
Which of the following is a polysaccharide found in plants used for storing energy?
Respuesta
  • amylose
  • amylopectin
  • cellulose
  • amylose and amylopectin
  • all three

Pregunta 4

Pregunta
A covalent bond involves:
Respuesta
  • a pair of electrons exchanged between atoms
  • an electrostatic attraction between atoms
  • the sharing of one or more protons between atoms
  • the sharing of one or more pairs of electrons between atoms
  • the exchange of one or more electrons between atoms

Pregunta 5

Pregunta
Unsaturated fatty acids are more likely to
Respuesta
  • be liquid at room temperature
  • be synthesized by animal cells
  • be solid at room temperature
  • contain more energy than saturated fatty acids

Pregunta 6

Pregunta
Which of the following functional groups tend to allow an organic compound to dissolve in water?
Respuesta
  • hydroxyl
  • methyl
  • carbonyl
  • hydroxyl and carbonyl
  • all three

Pregunta 7

Pregunta
The number of protons in the nucleus of an atom is referred to as
Respuesta
  • atomic mass
  • molecular weight
  • atomic weight
  • atomic number

Pregunta 8

Pregunta
Water is a polar molecule because
Respuesta
  • it readily forms ionic bonds with many different types of compounds
  • its oxygen atom is electronegative, while the hydrogens are electropositive
  • its two hydrogen bonds are equally attached to an oxygen
  • it has a +2 negative charge

Pregunta 9

Pregunta
Methyl groups (CH3-R) are generally
Respuesta
  • hydrophilic
  • amphipathic
  • polar
  • hydrophobic
  • charged

Pregunta 10

Pregunta
The breakdown of glycogen into glucose occurs by which of the following
Respuesta
  • dehydration reactions
  • hydrolytic reactions
  • isomerization
  • dehydration and isomerization
  • all three

Pregunta 11

Pregunta
Which of the following are functions of lipids?
Respuesta
  • genetic information
  • energy storage
  • major component of biological membranes
  • energy storage and major component
  • all three

Pregunta 12

Pregunta
A solution with a pH of 8 is more ________ than a solution with a pH of 5.
Respuesta
  • acidic
  • concentrated
  • hydrophobic
  • dense
  • basic

Pregunta 13

Pregunta
A pH of 4 has a _____-fold greater hydrogen ion concentration than a pH of 6.
Respuesta
  • 2
  • 10
  • 100
  • 1000
  • 10000

Pregunta 14

Pregunta
Using the periodic table of elements, which element is most likely to have properties similar to carbon?
Image:
105383278 Gettyimages 1094878164 Nc (binary/octet-stream)
Respuesta
  • aluminum (Al)
  • boron (B)
  • phosphorus (P)
  • silicon (Si)
  • nitrogen (N)

Pregunta 15

Pregunta
In a polar covalent bond
Respuesta
  • anions and cations are attracted to each other
  • electrons are transferred between atoms
  • when water becomes frozen
  • there is an unequal sharing of electrons between atoms
  • water molecules attract each other

Pregunta 16

Pregunta
The energy of light can be temporarily stored in which component of an atom?
Respuesta
  • protons
  • photons
  • neutrons
  • electrons
  • introns

Pregunta 17

Pregunta
The two nucleic acid strands of DNA are held together by
Respuesta
  • glycosidic linkages
  • covalent bonding between nitrogenous bases
  • hydrogen bonding between sugar-phosphate residues
  • hydrogen bonding between nitrogenous bases
  • covalent binding between nucelotides

Pregunta 18

Pregunta
An acid added to water will
Respuesta
  • decrease the hydrogen ion concentration
  • decrease the hydroxide ion concentration
  • increase the hydroxide concentration
  • increase pH

Pregunta 19

Pregunta
Which bond contributes to the tertiary structure of a protein?
Respuesta
  • ionic
  • hydrogen
  • glycosidic
  • ionic and hydrogen
  • all three

Pregunta 20

Pregunta
Water is pulled up into a tree due to
Respuesta
  • hydrogen bonding between water molecules
  • the cohesive and adhesive properties of water
  • the fluidity of water at room temperature
  • ionic bonding between water molecules

Pregunta 21

Pregunta
Which type of bond maintains the secondary structure of a protein
Respuesta
  • disulfide bridges
  • peptide bonds between two peptide subunits
  • hydrogen bonding between two phospholipid subunits
  • hydrogen bonding between an amino group of an amino acid and a carboxyl group of another amino acid

Pregunta 22

Pregunta
Amino acids within a peptide are covalently linked by peptide bonds between
Respuesta
  • acidic and basic side chains
  • carbonyl and amino groups
  • carboxyl and amino groups
  • polar and non-polar side chains
  • polar side chains

Pregunta 23

Pregunta
Insulin protein is soluble in water. A good explanation for this property is
Respuesta
  • that it does not have any secondary structure
  • it contains disulfide bridges
  • many of its amino acids have polar or charged side chains
  • most of its amino acids are hydrophobic

Pregunta 24

Pregunta
Hydrogen bonds form between
Respuesta
  • electropositive hydrogen atoms and an electronegative atom
  • hydrogen atoms
  • hydrogen atoms and any other atom
  • hydrogen atoms that share a pair of electrons with another atom

Pregunta 25

Pregunta
Of the molecules listed below, which contains the most phosphorus?
Respuesta
  • carbohydrates
  • proteins
  • fatty acids
  • nucleic acids

Pregunta 26

Pregunta
Although cellulose is a polymer of glucose molecules, humans cannot use it as a source of energy. Why?
Respuesta
  • cellulose is covered by a waxy coating protecting it from digestion
  • cellulose is hydrophobic
  • humans don't like the taste of cellulose
  • the molecule is too large to be broken down by hydrolytic enzymes
  • humans do not express specific enzymes to digest cellulose

Pregunta 27

Pregunta
All inert gases, such as neon (atomic number = 10) have which of the following in common?
Image:
105383278 Gettyimages 1094878164 Nc (binary/octet-stream)
Respuesta
  • they have the same number of protons
  • they have the same number of valence electrons
  • their outer electron shell is completely filled
  • they are all highly reactive

Pregunta 28

Pregunta
The ionic bond of NaCl arises from
Respuesta
  • attraction of a hydrogen atom and an electronegative atom
  • transfer of an electron to the nucleus of another atom
  • sharing of a pair of electrons
  • the attraction between two anions
  • an electrostatic attraction between two ions of opposite charge

Pregunta 29

Pregunta
The properties of an atom are determined by its
Respuesta
  • ionic number
  • atomic mass
  • half-life
  • mass number
  • atomic number

Pregunta 30

Pregunta
When NaCl dissolves in water
Respuesta
  • the entire molecule becomes surrounded by water
  • each ion becomes surrounded by water
  • the covalent bonds between sodium and chlorine atoms are broken
  • entire molecule surrounded by water and each ion surrounded by water
  • all three

Pregunta 31

Pregunta
Which of the functional groups above is a carboxyl?
Image:
Figure 02 03 07 (binary/octet-stream)
Respuesta
  • 1
  • 2
  • 3
  • 4
  • 5

Pregunta 32

Pregunta
Two compounds that are structural isomers
Respuesta
  • have the same total mass
  • have the same shape
  • have the same names
  • have the same properties

Pregunta 33

Pregunta
The tertiary structure of a protein is maintained by
Respuesta
  • hydrogen bonding
  • disulfide bridges
  • ionic bonds
  • hydrogen bonding and disulfide bridging
  • all three

Pregunta 34

Pregunta
Why does ice float?
Respuesta
  • Non-uniform spacing of dissolved ions
  • bubbles formed during freezing makes ice more buoyant
  • hydrogen bonds forming between water molecules in ice creates crystal lattice structure that keeping the water molecules farther apart
  • liquid water is translucent and ice is opaque
  • ice contains impurities that keep water molecules away from each other and therefor less dense

Pregunta 35

Pregunta
Which of the following molecules is a major component of biological membranes?
Respuesta
  • carbohydrates
  • phospholipids
  • fatty acids
  • triglycerides

Pregunta 36

Pregunta
Phospholipids contain
Respuesta
  • a hydrophobic head group
  • two hydrophobic tails
  • a ribose sugar
  • hydrophobic head and tails
  • all three

Pregunta 37

Pregunta
If a sample of DNA is composed of 20% guanine, what is the percentage of thymine?
Respuesta
  • 10%
  • 20%
  • 30%
  • 60%
  • 80%

Pregunta 38

Pregunta
The side-chain of the amino acid shown above is
Image:
L Tyrosine (binary/octet-stream)
Respuesta
  • non-polar, charged
  • non-polar
  • polar, uncharged
  • polar, charged

Pregunta 39

Pregunta
Water acts as a solvent because
Respuesta
  • it can dissolve any compound
  • it can be surrounded by both non-polar molecules and ionic compounds
  • it is liquid at room temperature
  • it is a polar molecule
  • it forms hydrogen bonds with itself

Pregunta 40

Pregunta
What kind of reaction is required to synthesize a polymer?
Respuesta
  • anxiolytic
  • hydrophobic
  • dehydration
  • hydrolytic
  • anabolic

Pregunta 41

Pregunta
A cation
Respuesta
  • is a positively charged atom
  • is produced by a covalent bond
  • is a negatively charged atom
  • contains more neutrons than protons

Pregunta 42

Pregunta
A mutation that affects the primary structure of a protein, in turn, may affect
Respuesta
  • the secondary structure of the protein
  • the tertiary structure of a protein
  • the quaternary structure of the protein
  • secondary and tertiary
  • all three

Pregunta 43

Pregunta
Which of the following molecules is a carbohydrate?
Respuesta
  • C18H9O18
  • C10H12O10
  • C4H8O4
  • C24H2O24
  • C1H3O6

Pregunta 44

Pregunta
Which of the following is not true regarding isomers?
Respuesta
  • isomers have different shapes
  • they have the same number of atoms
  • they have the same chemical properties
  • they may differ in how atoms are arranged across double bonds
  • they have different properties

Pregunta 45

Pregunta
Carbon Dioxide (CO2) consists of a carbon atom with double covalent bonds to each oxygen. How many electron pairs are shared between a carbon and oxygen atom?
Respuesta
  • 1
  • 2
  • 3
  • 4
  • 8

Pregunta 46

Pregunta
Which atoms, when covalently bonded to hydrogen, are generally electronegative?
Respuesta
  • oxygen
  • nitrogen
  • sodium
  • oxygen and nitrogen
  • all three

Pregunta 47

Pregunta
An atom with an atomic number of 12 has how many electrons in its most outer shell?
Respuesta
  • 0
  • 1
  • 2
  • 8
  • 12

Pregunta 48

Pregunta
Glycogen in animals and amylose in plants
Respuesta
  • are disaccharides
  • are polymers that store glucose
  • cannot both be digested by humans
  • are long chains of amino acids
  • are hydrophobic compounds

Pregunta 49

Pregunta
Of the atoms in the first two rows of the periodic table, carbon atoms are unique because they
Image:
105383278 Gettyimages 1094878164 Nc (binary/octet-stream)
Respuesta
  • have four valence electrons
  • readily form polar covalent bonds with oxygen atoms
  • are molecularly stable
  • four valence electrons and molecularly stable
  • all three

Pregunta 50

Pregunta
Which of the following are components of a nucleotide?
Respuesta
  • polar and non-polar amino acids
  • nitrogenous base and phosphate group and sugar
  • glycerol and three fatty acids
  • glycerol and two fatty acids and phosphate group
Mostrar resumen completo Ocultar resumen completo

¿Quieres crear tus propios Tests gratis con GoConqr? Más información.

Similar

Biology AQA 3.1.3 Cells
evie.daines
Biology AQA 3.2.5 Mitosis
evie.daines
Biology AQA 3.1.3 Osmosis and Diffusion
evie.daines
Biology- Genes, Chromosomes and DNA
Laura Perry
Biology- Genes and Variation
Laura Perry
Enzymes and Respiration
I Turner
GCSE AQA Biology - Unit 2
James Jolliffe
GCSE AQA Biology 1 Quiz
Lilac Potato
Using GoConqr to study science
Sarah Egan
Cells and the Immune System
Eleanor H
GCSE Biology AQA
isabellabeaumont
Explorar la Librería