UCI BIO 93 QUESTIONS AND ANSWERS A+
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What are the four most common elements in living matter?
Hydrogen, Oxygen, Nitrogen, and Carbon --make up 96% of all living matter.
Properties of Acids
Donate H+ to a solution, accept electrons, and have a pH of <7
What happens in the S phase of the cell cycle?
DNA Synthesis
What happens in the G1 phase of the cell cycle?
Growth -- cell contents are duplicated.
What happens in the G2 phase of the cell cycle?
More growth and preparation for division.
What happens in the M phase of the cell cycle?
Mitosis (and cytokinesis -- division of the cell).
What are the subphases of mitosis?
Prophase, Pre-metaphase, Metaphase, Anaphase, and Telophase.
How many checkpoints are there in the cell cycle?
3 -- G1 checkpoint, G2 checkpoint, and the M checkpoint.
What is a Karyotype?
A layout of Metaphase chromosomes matched with their homologous pairs.
What is a diploid cell?
A cell with 46 chromosomes -- somatic cells.
What is a haploid cell?
A cell with 23 chromosomes -- sex cells.
What does the mesoderm give rise to?
the notochord (similar to a spinal chord).
What does the endoderm give rise to?
the digestive tract.
What does the ectoderm give rise to?
the nervous system (brain)/neural plate.
If 2n = 18, how many chromosomes come from the mother?
9 -- half from mom and half from dad
Meiosis
Meiosis is a specialized type of cell division that reduces the chromosome number by
half, creating four haploid cells, each genetically distinct from the parent cell that gave
rise to them.
What two structures does the chiasma connect?
Non-sister chromatids.
What are the steps of meiosis?
Prophase I, Metaphase I, Anaphase I, Telophase I & cytokinesis (then a second set of
phases)
What does meiosis 1 deal with?
homologous chromosomes.
What happens in prophase 1?
GRADED. Buy Quality Materials!
What are the four most common elements in living matter?
Hydrogen, Oxygen, Nitrogen, and Carbon --make up 96% of all living matter.
Properties of Acids
Donate H+ to a solution, accept electrons, and have a pH of <7
What happens in the S phase of the cell cycle?
DNA Synthesis
What happens in the G1 phase of the cell cycle?
Growth -- cell contents are duplicated.
What happens in the G2 phase of the cell cycle?
More growth and preparation for division.
What happens in the M phase of the cell cycle?
Mitosis (and cytokinesis -- division of the cell).
What are the subphases of mitosis?
Prophase, Pre-metaphase, Metaphase, Anaphase, and Telophase.
How many checkpoints are there in the cell cycle?
3 -- G1 checkpoint, G2 checkpoint, and the M checkpoint.
What is a Karyotype?
A layout of Metaphase chromosomes matched with their homologous pairs.
What is a diploid cell?
A cell with 46 chromosomes -- somatic cells.
What is a haploid cell?
A cell with 23 chromosomes -- sex cells.
What does the mesoderm give rise to?
the notochord (similar to a spinal chord).
What does the endoderm give rise to?
the digestive tract.
What does the ectoderm give rise to?
the nervous system (brain)/neural plate.
If 2n = 18, how many chromosomes come from the mother?
9 -- half from mom and half from dad
Meiosis
Meiosis is a specialized type of cell division that reduces the chromosome number by
half, creating four haploid cells, each genetically distinct from the parent cell that gave
rise to them.
What two structures does the chiasma connect?
Non-sister chromatids.
What are the steps of meiosis?
Prophase I, Metaphase I, Anaphase I, Telophase I & cytokinesis (then a second set of
phases)
What does meiosis 1 deal with?
homologous chromosomes.
What happens in prophase 1?
