PCB 3023 Exam 1 | UPDATED Questions with 100% Verified Answers
Question:
The cell theory
Answer:
1. All living organisms are made of one or more cells.
2. Cells are the basic unit of all living organisms.
3. Cells arise from pre-existing cells.
•All cells are essentially the same in chemical composition.
Question:
The largest cell in humans
Answer:
the egg.
Question:
Robert hook
Answer:
- Discovered cells in peices of cork under the microscope. =
- Was really looking at the cell walls that are dead.
Question:
Edward Strasburger
Answer:
- College german professor.
- Hair cells of flowers.
Question:
Cell arise from
Answer:
pre-existing cells
Question:
The eukaryotic cell division cycle
, Answer:
1. Chromosome (DNA) replication.
2. Chromosome segregation (Mitosis)
3. Cell divsion (Cytokinesis)
Question:
Chromosome (DNA) replication
Answer:
duplication of the DNA
molecules in the nucleus in preparation for mitosis.
Question:
Mitosis
Answer:
division of the nucleus.
Question:
Cytokinesis
Answer:
division of the cytoplasm and the membrane (the division of the rest of the cell).
Question:
The previous three events in the eukaryotic cell division cycle
usually occur in sequence, but exceptions exist, such as:
, Answer:
Polytene chromosomes are the result of multiple rounds of DNA replication without
mitosis.
A syncytium is a polynucleated structure that forms after multiple rounds of mitosis
without cytokinesis. It may also form from the fusion of multiple mononucleated cells
Question:
The giant salivary gland cells of the Drosophila larva go
through multiple rounds of DNA replication with no cell
division (No mitosis), resulting in
Answer:
polytene chromosomes.
No mitosis.
Question:
The implantation of the human blastocyst and formation of the
syncytiotrophoblast
Answer:
No cytokinesis.
, Question:
This ___________ forms after multiple rounds of mitosis without
cytokinesis of the embryonic cells that invade the uterine wall.
Answer:
syncytium
Question:
The precursor of the
mammalian placenta is
Answer:
Syncytiotrophoblast.
Question:
The Stanley Miller (Miller-Urey) experiments recreated the
conditions thought to exist in the primitive earth.
Answer:
Seven simple molecules (all gases): H2O (water), N2, NH3 (ammonia), CO, CO2, CH4
(methane), and H2 (but no O2!)
- Heat evaporates water, simulating sunlight.
- Radiation (electrodes discharging sparks into main chamber) simulating lighting and
Question:
The cell theory
Answer:
1. All living organisms are made of one or more cells.
2. Cells are the basic unit of all living organisms.
3. Cells arise from pre-existing cells.
•All cells are essentially the same in chemical composition.
Question:
The largest cell in humans
Answer:
the egg.
Question:
Robert hook
Answer:
- Discovered cells in peices of cork under the microscope. =
- Was really looking at the cell walls that are dead.
Question:
Edward Strasburger
Answer:
- College german professor.
- Hair cells of flowers.
Question:
Cell arise from
Answer:
pre-existing cells
Question:
The eukaryotic cell division cycle
, Answer:
1. Chromosome (DNA) replication.
2. Chromosome segregation (Mitosis)
3. Cell divsion (Cytokinesis)
Question:
Chromosome (DNA) replication
Answer:
duplication of the DNA
molecules in the nucleus in preparation for mitosis.
Question:
Mitosis
Answer:
division of the nucleus.
Question:
Cytokinesis
Answer:
division of the cytoplasm and the membrane (the division of the rest of the cell).
Question:
The previous three events in the eukaryotic cell division cycle
usually occur in sequence, but exceptions exist, such as:
, Answer:
Polytene chromosomes are the result of multiple rounds of DNA replication without
mitosis.
A syncytium is a polynucleated structure that forms after multiple rounds of mitosis
without cytokinesis. It may also form from the fusion of multiple mononucleated cells
Question:
The giant salivary gland cells of the Drosophila larva go
through multiple rounds of DNA replication with no cell
division (No mitosis), resulting in
Answer:
polytene chromosomes.
No mitosis.
Question:
The implantation of the human blastocyst and formation of the
syncytiotrophoblast
Answer:
No cytokinesis.
, Question:
This ___________ forms after multiple rounds of mitosis without
cytokinesis of the embryonic cells that invade the uterine wall.
Answer:
syncytium
Question:
The precursor of the
mammalian placenta is
Answer:
Syncytiotrophoblast.
Question:
The Stanley Miller (Miller-Urey) experiments recreated the
conditions thought to exist in the primitive earth.
Answer:
Seven simple molecules (all gases): H2O (water), N2, NH3 (ammonia), CO, CO2, CH4
(methane), and H2 (but no O2!)
- Heat evaporates water, simulating sunlight.
- Radiation (electrodes discharging sparks into main chamber) simulating lighting and
