Biology 101 - General Biology » Spring 2022 » Exam 1
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Question #1
All of the organisms inhabiting a particular ecosystem are known as _____.
A.
a population
B.
a community
C.
an organism
D.
a biosphere
Question #2
All of the individuals if the same species living within a specified area are known as _____.
A.
population
B.
family
C.
ecosystem
D.
community
Question #3
The individuals in a species that are better able to survive and reproduce will pass more of their genes on to the next generation. This is called _____.
A.
a common ancestor
B.
natural selection
C.
gene flow
D.
beak selection
Question #4
Strong evidence for the common ancestry of all life comes from the fact that _____.
A.
plants convert light energy to chemical energy
B.
there is a universal genetic code
C.
enzymes are used by all cells
D.
decomposers include both bacteria and fungi
Question #5
A control group is _____.
A.
matched with the experimental group except for one variable
B.
left alone by the experiments
C.
exposed to several variables
D.
kept in an unchanging environment
Question #6
Which is NOT a characteristic of all living organisms?
A.
use of DNA as the genetic material
B.
emergent properties
C.
ability to photosynthesize
D.
interaction with the environment
Question #7
Which four elements make up approximately 96% of living matter
A.
oxygen, hydrogen, calcium, nitrogen
B.
carbon, oxygen, phosphorus, hydrogen
C.
carbon, sodium, hydrogen, nitrogen
D.
carbon, hydrogen, nitrogen, oxygen
Question #8
The atomic number of sulfur is 16, which means that sulfur has _____.
A.
16 protons and 16 neutrons
B.
16 neutrons
C.
16 protons
D.
8 protons and 8 neutrons
Question #9
Oxygen has an atomic number 8 and a mass number of 16. What is the atomic mass of oxygen
A.
approximately 16 grams
B.
approximately 16 amu (daltons)
C.
approximately 8 amu (daltons)
D.
approximately 8 grams
Question #10
Two atoms that have the same mass number must have the same _____.
A.
number of protons + neutrons
B.
number of electrons
C.
protons
D.
atomic number
Question #11
Which bond or interaction is the strongest?
A.
covalent bond
B.
hydrogen bond
C.
hydrophobic interaction
D.
van der Waals interaction
Question #12
For water to evaporate, _____ must be broken.
A.
polar covalent bonds
B.
nonpolar covalent bonds
C.
ionic bonds
D.
hydrogen bonds
Question #13
Too much atmospheric carbon dioxide damages coral reefs in the ocean. Which factor is a cause of this damage?
A.
decreasing the H+ concentration
B.
increasing the H+ ion concentration
C.
decreasing the ocean temperature
D.
increasing the amount of carbonate ions
Question #14
In a aqueous solution, a strong base like NaOH _____.
A.
dissociates completely
B.
is a strong buffer
C.
decreases the pH
D.
acts as an acid
Question #15
Will table salt (NaCl) dissolve more in methanol (a nonpolar substance ) or pure water?
A.
NaCl dissolves more in methanol
B.
NaCl dissolves more in pure water
Question #16
If the pH of a solution is decreased from pH 8 to pH 6, this means the solution is ____ times more acidic now.
A.
10
B.
100
C.
1
D.
2
Question #17
If the pH of a solution is increased from pH 5 to pH 7, this means the solution is ____ times more basic now.
A.
1
B.
100
C.
10
D.
2
Question #18
A group of atoms, commonly found together in biological molecules, that participates in reactions is called _____.
A.
polymer
B.
functional group
C.
isomer
D.
hydrocarbon
Question #19
A carbon atom is most likely to form _____ with other atoms.
A.
ionic bonds
B.
no bonds
C.
hydrogen bonds
D.
covalent bonds
Question #20
Which functional group in ATP is part of the process that releases energy for cells to use?
A.
phosphate group
B.
hydroxyl group
C.
methyl group
D.
amino group
Question #21
Reactions that build polymers are an example of _____ reactions.
A.
monomer
B.
dehydration
C.
breakdown
D.
hydrolysis
Question #22
The structural polysaccharide, cellulose, is found in _____.
A.
amyloplast, plant organelles that store carbohydrates
B.
plant cell walls
C.
animal cell membranes
D.
bacterial cell walls
Question #23
On foods packages, “fiber” refers to _____.
A.
fats
B.
proteins
C.
cellulose
D.
starch
Question #24
Lactose, a sugar in milk, is one glucose molecule bonded to one galactose molecule. Lactose is a(n) _____.
A.
polysaccharide
B.
monosaccharide
C.
disaccharide
D.
starch
Question #25
Which molecule are hydrophobic?
A.
lipids
B.
proteins
C.
nucleic acids
D.
carbohydrates
Question #26
Saturated fats ______.
A.
are liquid at room temperature
B.
have multiple double bonds in their fatty acids
C.
are more common in plants than in animals
D.
are solid at room temperature
Question #27
Hydrocarbons have mostly _____, which makes them insoluble in water.
A.
polar covalent bonds
B.
hydrophilic functional groups
C.
charged functional groups
D.
nonpolar covalent bonds
Question #28
Collagen is a protein made of three polypeptides. This means that collagen has _____ structure.
A.
tertiary
B.
primary
C.
quaternary
D.
secondary
Question #29
A β-pleated sheet is an example of _____ structure.
A.
tertiary
B.
primary
C.
quaternary
D.
secondary
Question #30
The secondary structure of a protein is the _____.
A.
complex of multiple protein subunits (polypeptides)
B.
α-helix or β-pleated sheet
C.
order of amino acids
D.
three-dimensional shape of the protein
Question #31
How many peptide bonds are present in a protein that contains 45 amino acids?
A.
90
B.
45
C.
44
D.
46
Question #32
The α-helix and β-pleated sheet are examples of _____ protein structure.
A.
secondary
B.
primary
C.
quaternary
D.
tertiary
Question #33
In a cellular protein, where would you expect to find a hydrophilic amino acid?
A.
on the outside of the protein, interacting with water
B.
on the inside of the protein, away from water
C.
on the outside of the protein, interacting with lipid molecules
D.
on the outside of a membrane protein, interacting with phospholipid fatty acid tails
Question #34
The tertiary structure of a protein is the _____.
A.
complex of multiple protein subunits (polypeptides)
B.
α-helix and β-pleated sheet
C.
order of amino acids
D.
three-dimensional shape of the protein
Question #35
One function of RNA molecules is to _____.
A.
copy themselves
B.
copy DNA
C.
pass genetic information to offspring
D.
carry messages from DNA to ribosomes
Question #36
Which statement about RNA is correct?
A.
RNA is double-stranded.
B.
RNA contains thymine (T).
C.
RNA is made of amino acids.
D.
RNA is single-stranded.
Question #37
The sequence GAACUU may be found in _____.
A.
RNA only
B.
neither DNA nor RNA
C.
DNA only
D.
both DNA and RNA
Question #38
DNA is made of _____.
A.
amino acids
B.
fatty acids
C.
nucleotides
D.
monosaccharides
Question #39
Which molecules is not a carbohydrate?
A.
starch
B.
polysaccharide
C.
fatty acids
D.
disaccharide
Question #40
An example of dehydration reaction is _____.
A.
starch and water reacting to form glucose molecules
B.
two glucose molecules reacting to form maltose and water
C.
DNA and water reacting to form nucleotides
D.
a dipeptide and water reacting to form two amino acids
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