PCB 3023 Exam 1 University of Central Florida | UPDATED Questions
with 100% Verified Answers
Question:
Flow of genetic information in all living cells
Answer:
DNA -> RNA -> Protein
Replication-> Transcription -> Translation
Question:
Miller-Urey experiment
Answer:
recreated conditions thought to exist in the atmosphere of primitive earth. No Oxygen!
Used heat to simulate sun, electric discharge to simulate lightning, and cooling to
condense molecules to liquid form.
7 simple molecules: water vapor, nitrogen, ammonia, co2, co, methane, and hydrogen.
Question:
Miller-Urey results
Answer:
With each round of heating, energy radiation, and cooling, more complex organisms
were formed:
1. aldehydes
2. simple acids
3. more complex acids
Suggests organic molecules can form under abiotic conditions.
Question:
Ribozome catalyzed reactions
Answer:
observed in:
genome replication in some RNA viruses
intron splicing
,ribosome function in translation
Question:
Evidence for RNA World
Answer:
RNA can catalyze the polymerization of nucleotides, including the synthesis of
complementary RNA, using itself as a template. Not observed in DNA.
Question:
The first cell
Answer:
self-replicating RNA and other life-promoting molecules inside a phospholipid
membrane
Question:
What Constrains the size of a cell?
Answer:
The ratio of surface area to volume. Smaller cells have a greater surface area to volume
ratio.
Question:
Surface area to volume ratio
Answer:
radius = 1cm -> Surface area : volume ratio is ~ 3:1
Radius = 10cm -> Suface area : volume ratio is ~ 1:3
Question:
High sa : v ratio means
Answer:
more membrane per unite of volume. important for the cell to interact with its
environment. smaller cell interact more efficiently; less likely to lose energy as heat to
surroundings.
, Question:
prokaryotic cell
Answer:
no nucleus
no organelles
single chromosome (in nucleoid area) +plasmids
cell wall
capsule
most diverse of cells
Question:
Photosynthetic bacteria
Answer:
obtain energy from sunlight. have internal system of membranes where photosynthesis
occurs.
Question:
chemosynthetic
Answer:
derive energy from oxidation of H2S.
ex. Filamentous Beggiatoa
Question:
Mitochondria
Answer:
organelles found in most eukaryotic cells and generate most of the cell's supply of
usable energy. extract energy from food
DNA-containing organelles (endosymbionts)
enclosed by double membrane
Question:
chloroplasts
Answer:
with 100% Verified Answers
Question:
Flow of genetic information in all living cells
Answer:
DNA -> RNA -> Protein
Replication-> Transcription -> Translation
Question:
Miller-Urey experiment
Answer:
recreated conditions thought to exist in the atmosphere of primitive earth. No Oxygen!
Used heat to simulate sun, electric discharge to simulate lightning, and cooling to
condense molecules to liquid form.
7 simple molecules: water vapor, nitrogen, ammonia, co2, co, methane, and hydrogen.
Question:
Miller-Urey results
Answer:
With each round of heating, energy radiation, and cooling, more complex organisms
were formed:
1. aldehydes
2. simple acids
3. more complex acids
Suggests organic molecules can form under abiotic conditions.
Question:
Ribozome catalyzed reactions
Answer:
observed in:
genome replication in some RNA viruses
intron splicing
,ribosome function in translation
Question:
Evidence for RNA World
Answer:
RNA can catalyze the polymerization of nucleotides, including the synthesis of
complementary RNA, using itself as a template. Not observed in DNA.
Question:
The first cell
Answer:
self-replicating RNA and other life-promoting molecules inside a phospholipid
membrane
Question:
What Constrains the size of a cell?
Answer:
The ratio of surface area to volume. Smaller cells have a greater surface area to volume
ratio.
Question:
Surface area to volume ratio
Answer:
radius = 1cm -> Surface area : volume ratio is ~ 3:1
Radius = 10cm -> Suface area : volume ratio is ~ 1:3
Question:
High sa : v ratio means
Answer:
more membrane per unite of volume. important for the cell to interact with its
environment. smaller cell interact more efficiently; less likely to lose energy as heat to
surroundings.
, Question:
prokaryotic cell
Answer:
no nucleus
no organelles
single chromosome (in nucleoid area) +plasmids
cell wall
capsule
most diverse of cells
Question:
Photosynthetic bacteria
Answer:
obtain energy from sunlight. have internal system of membranes where photosynthesis
occurs.
Question:
chemosynthetic
Answer:
derive energy from oxidation of H2S.
ex. Filamentous Beggiatoa
Question:
Mitochondria
Answer:
organelles found in most eukaryotic cells and generate most of the cell's supply of
usable energy. extract energy from food
DNA-containing organelles (endosymbionts)
enclosed by double membrane
Question:
chloroplasts
Answer:
