LSU BIOL 2051 FINAL EXAM 1
QUESTIONS AND ALL CORRECT
ANSWERS.
B - Answer 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
D - Answer 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
B - Answer Which of the following would a microbiologist not study?
A) viruses
B) plants
C) protozoans
D) fungi
E) diatoms
F, most of them are actually good!! - Answer T/F. All microbes are pathogenic and harmful to
humans.
-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!:) - Answer List three examples of the benefits of
microbes.
,D - Answer About how many microbes are living on Earth right now?
A) 25x10^1
B) 25x10^10
C) 25x10^18
D) 25x10^29
A - Answer 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
-Bacteria
-Archaea
-Eukarya - Answer List the three domains of life:
T - Answer T/F. Most Eukaryans are microbes.
A - Answer 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
B - Answer 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
E - Answer 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
E - Answer 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
B - Answer Which of the following words accurately describes the early Earth's atmosphere?
A) oxic
B) anoxic
C) turbulent
D) oxidated
E) turbid
D - Answer 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 Which of these describes the primitive metabolism of early life?
A - Answer 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
QUESTIONS AND ALL CORRECT
ANSWERS.
B - Answer 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
D - Answer 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
B - Answer Which of the following would a microbiologist not study?
A) viruses
B) plants
C) protozoans
D) fungi
E) diatoms
F, most of them are actually good!! - Answer T/F. All microbes are pathogenic and harmful to
humans.
-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!:) - Answer List three examples of the benefits of
microbes.
,D - Answer About how many microbes are living on Earth right now?
A) 25x10^1
B) 25x10^10
C) 25x10^18
D) 25x10^29
A - Answer 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
-Bacteria
-Archaea
-Eukarya - Answer List the three domains of life:
T - Answer T/F. Most Eukaryans are microbes.
A - Answer 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
B - Answer 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
E - Answer 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
E - Answer 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
B - Answer Which of the following words accurately describes the early Earth's atmosphere?
A) oxic
B) anoxic
C) turbulent
D) oxidated
E) turbid
D - Answer 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 Which of these describes the primitive metabolism of early life?
A - Answer 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
