BIOL 2051 EXAM 1 LSU Questions with 100% Verified
Answers Latest Update
Question: Microbiology is the study of ________.
A) small organic molecules
B) all cellular and noncellular organisms too small to be seen with the naked eye
C) small eukaryotic cells and the evolution of eukaryotic cells
D) only A and B are correct
E) all three are correct
Answer:
B
Question: Which of the following is not a characteristic of cells?
A) they interact with the environment
B) they communicate with each other
C) they can move
D) can function independently of one another
E) grow and give rise into new cells
Answer:
D
Question:
Answer:
Question: Which of the following would a microbiologist not study?
A) viruses
B) plants
C) protozoans
D) fungi
E) diatoms
Answer:
B
Question: F, most of them are actually good!!
Answer:
T/F. All microbes are pathogenic and harmful to humans.
Question: List three examples of the benefits of microbes.
Answer:
-they are on the root nodules of soy bean plants and can fix nitrogen for the plant
,-they can be found in the guts of a cow and help the cow in digestion of foods that they
otherwise wouldn't be able to digest without microbes
-can be used as biofuels to degrade methane
-are used to make cheese and beer!:)
Question: About how many microbes are living on Earth right now?
A) 25x10^1
B) 25x10^10
C) 25x10^18
D) 25x10^29
Answer:
D
Question: Microbes are mostly found in the _______.
A) marine subsurface and terrestrial subsurface
B) marine subsurface and surface soil
C) oceans and terrestrial subsurface
D) terrestrial subsurface and surface soil
E) oceans and surface soil
Answer:
A
Question: List the three domains of life:
Answer:
-Bacteria
-Archaea
-Eukarya
Question: T
Answer:
T/F. Most Eukaryans are microbes.
Question: Which of the following is true of chloroplasts?
A) they were originally independent bacterial cells
B) they were originally independent eukaryotic cells
C) they originated around 4 billion years ago
D) they can be found in all plant cells and some bacterial cells
E) they became part of the bacterial cell when they were engulfed by an amoeba and were
kept in because they allowed the cell to make energy efficiently
Answer:
A
,Question: How old is planet Earth?
A) around 4 byo
B) around 4.5 byo
C) 4,000 years old
D) 1 million years old
E) around 2.6 byo
Answer:
B
Question: Which of the following accurately describes the conditions of early Earth?
A) microbes could not survive because the temperatures were too high for life
B) the conditions were similar to that of the Sun
C) there was not enough water for cells, which are water based, to survive
D) the atmosphere consisted mainly of CO₂
E) all are correct
Answer:
E
Question:
Answer:
Question: Which of the following is evidence for the origin of cellular life?
A) water provided ideal conditions for early water-based cellular life
B) when the earth cooled, molecules were able to combine together to form cells
C) cells were able to combine together to form more cells or organelles, etc.
D) only A and B are correct
E) all are correct
Answer:
E
Question: Which of the following words accurately describes the early Earth's atmosphere?
A) oxic
B) anoxic
C) turbulent
D) oxidated
E) turbid
Answer:
B
Question: Which of the following is not evidence for RNA as the first genome?
A) catalytic RNAs have enzymatic activity
B) RNA can bind small molecules like ATP, nucleotides, and amino acids
, C) RNA fossils were discovered to be older than DNA fossils
D) only A and B are correct
E) A, B, and C are correct
Answer:
D
Question: Which of these describes the primitive metabolism of early life?
Answer:
Question: Which of these describes the evidence for the first microbial life?
A) fossilized cells found in rocks dating to around 3.5 bya
B) cells found in dinosaur fossils dating to around 4 bya
C) cells found in ancient fish fossils dating to around 3.5 bya
D) fossilized cells found in clay dating to around 2 bya
Answer:
A
Question: Which of the following was not part of the shift from an anoxic to oxic
environment?
A) when oxygen and iron reacted, it oxidized the ocean and allowed the ocean to release
oxygen into the atmosphere
B) accumulation of oxygen in the atmosphere led to a decrease of carbon dioxide in the
atmosphere
C) oxygen reacted with UV light which led to the formation of the ozone layer
D) then UV light was able to break through the ozone layer, which killed a majority of the
microbes and gave rise to the modern microbes
E) formation of the ozone layer allowed ocean-dwelling microbes to move to land
Answer:
D
Question: Which cells were the first cells to be formed?
A) eukaryotic
B) prokaryotic
C) protozoans
D) archaeans
E) diatoms
Answer:
B
Question: The first prokaryotic cells had all of the following except_______.
A) cytoplasmic membrane
B) non-bounded DNA (found in the nucleoid)
Answers Latest Update
Question: Microbiology is the study of ________.
A) small organic molecules
B) all cellular and noncellular organisms too small to be seen with the naked eye
C) small eukaryotic cells and the evolution of eukaryotic cells
D) only A and B are correct
E) all three are correct
Answer:
B
Question: Which of the following is not a characteristic of cells?
A) they interact with the environment
B) they communicate with each other
C) they can move
D) can function independently of one another
E) grow and give rise into new cells
Answer:
D
Question:
Answer:
Question: Which of the following would a microbiologist not study?
A) viruses
B) plants
C) protozoans
D) fungi
E) diatoms
Answer:
B
Question: F, most of them are actually good!!
Answer:
T/F. All microbes are pathogenic and harmful to humans.
Question: List three examples of the benefits of microbes.
Answer:
-they are on the root nodules of soy bean plants and can fix nitrogen for the plant
,-they can be found in the guts of a cow and help the cow in digestion of foods that they
otherwise wouldn't be able to digest without microbes
-can be used as biofuels to degrade methane
-are used to make cheese and beer!:)
Question: About how many microbes are living on Earth right now?
A) 25x10^1
B) 25x10^10
C) 25x10^18
D) 25x10^29
Answer:
D
Question: Microbes are mostly found in the _______.
A) marine subsurface and terrestrial subsurface
B) marine subsurface and surface soil
C) oceans and terrestrial subsurface
D) terrestrial subsurface and surface soil
E) oceans and surface soil
Answer:
A
Question: List the three domains of life:
Answer:
-Bacteria
-Archaea
-Eukarya
Question: T
Answer:
T/F. Most Eukaryans are microbes.
Question: Which of the following is true of chloroplasts?
A) they were originally independent bacterial cells
B) they were originally independent eukaryotic cells
C) they originated around 4 billion years ago
D) they can be found in all plant cells and some bacterial cells
E) they became part of the bacterial cell when they were engulfed by an amoeba and were
kept in because they allowed the cell to make energy efficiently
Answer:
A
,Question: How old is planet Earth?
A) around 4 byo
B) around 4.5 byo
C) 4,000 years old
D) 1 million years old
E) around 2.6 byo
Answer:
B
Question: Which of the following accurately describes the conditions of early Earth?
A) microbes could not survive because the temperatures were too high for life
B) the conditions were similar to that of the Sun
C) there was not enough water for cells, which are water based, to survive
D) the atmosphere consisted mainly of CO₂
E) all are correct
Answer:
E
Question:
Answer:
Question: Which of the following is evidence for the origin of cellular life?
A) water provided ideal conditions for early water-based cellular life
B) when the earth cooled, molecules were able to combine together to form cells
C) cells were able to combine together to form more cells or organelles, etc.
D) only A and B are correct
E) all are correct
Answer:
E
Question: Which of the following words accurately describes the early Earth's atmosphere?
A) oxic
B) anoxic
C) turbulent
D) oxidated
E) turbid
Answer:
B
Question: Which of the following is not evidence for RNA as the first genome?
A) catalytic RNAs have enzymatic activity
B) RNA can bind small molecules like ATP, nucleotides, and amino acids
, C) RNA fossils were discovered to be older than DNA fossils
D) only A and B are correct
E) A, B, and C are correct
Answer:
D
Question: Which of these describes the primitive metabolism of early life?
Answer:
Question: Which of these describes the evidence for the first microbial life?
A) fossilized cells found in rocks dating to around 3.5 bya
B) cells found in dinosaur fossils dating to around 4 bya
C) cells found in ancient fish fossils dating to around 3.5 bya
D) fossilized cells found in clay dating to around 2 bya
Answer:
A
Question: Which of the following was not part of the shift from an anoxic to oxic
environment?
A) when oxygen and iron reacted, it oxidized the ocean and allowed the ocean to release
oxygen into the atmosphere
B) accumulation of oxygen in the atmosphere led to a decrease of carbon dioxide in the
atmosphere
C) oxygen reacted with UV light which led to the formation of the ozone layer
D) then UV light was able to break through the ozone layer, which killed a majority of the
microbes and gave rise to the modern microbes
E) formation of the ozone layer allowed ocean-dwelling microbes to move to land
Answer:
D
Question: Which cells were the first cells to be formed?
A) eukaryotic
B) prokaryotic
C) protozoans
D) archaeans
E) diatoms
Answer:
B
Question: The first prokaryotic cells had all of the following except_______.
A) cytoplasmic membrane
B) non-bounded DNA (found in the nucleoid)
