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UCI Bio 93 Final Exam Questions With 100% Verified Answers

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UCI Bio 93 Final Exam Questions With 100% Verified Answers What are the four most common elements in living matter? - answerHydrogen, Oxygen, Nitrogen, and Carbon --make up 96% of all living matter. Properties of Acids - answerDonate H+ to a solution, accept electrons, and have a pH of <7 W...

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  • October 2, 2024
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UCI Bio 93 Final Exam Questions With
100% Verified Answers


What are the four most common elements in living matter? - answer✔Hydrogen, Oxygen,

Nitrogen, and Carbon --make up 96% of all living matter.


Properties of Acids - answer✔Donate H+ to a solution, accept electrons, and have a pH of <7


What happens in the S phase of the cell cycle? - answer✔DNA Synthesis


What happens in the G1 phase of the cell cycle? - answer✔Growth -- cell contents are

duplicated.


What happens in the G2 phase of the cell cycle? - answer✔More growth and preparation for

division.


What happens in the M phase of the cell cycle? - answer✔Mitosis (and cytokinesis -- division of

the cell).


What are the subphases of mitosis? - answer✔Prophase, Pre-metaphase, Metaphase, Anaphase,

and Telophase.


How many checkpoints are there in the cell cycle? - answer✔3 -- G1 checkpoint, G2 checkpoint,

and the M checkpoint.

, ©BRAINBARTER 2024/2025


What is a Karyotype? - answer✔A layout of Metaphase chromosomes matched with their

homologous pairs.


What is a diploid cell? - answer✔A cell with 46 chromosomes -- somatic cells.


What is a haploid cell? - answer✔A cell with 23 chromosomes -- sex cells.


What does the mesoderm give rise to? - answer✔the notochord (similar to a spinal chord).


What does the endoderm give rise to? - answer✔the digestive tract.


What does the ectoderm give rise to? - answer✔the nervous system (brain)/neural plate.


If 2n = 18, how many chromosomes come from the mother? - answer✔9 -- half from mom and

half from dad


Meiosis - answer✔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? - answer✔Non-sister chromatids.


What are the steps of meiosis? - answer✔Prophase I, Metaphase I, Anaphase I, Telophase I &

cytokinesis (then a second set of phases)


What does meiosis 1 deal with? - answer✔homologous chromosomes.

, ©BRAINBARTER 2024/2025


What happens in prophase 1? - answer✔The chromosomes condense, the nuclear envelope

breaks down, chromosomes cross over, and meiotic spindle forms.


What happens in metaphase 1? - answer✔the pairs of homologous chromosomes are now tightly

condensed and coiled and become arranged on the metaphase plate.


What happens in anaphase 1? - answer✔the pairs of chromosomes are pulled apart by the spindle

fibers (microtubules).


What happens in Telophase 1 and cytokinesis? - answer✔The homologous chromosome pairs

complete their migration to the two poles as a result of the action of the spindle. Now a haploid

set of chromosomes is at each pole, with each chromosome still having two chromatids. A

nuclear envelope reforms around each chromosome set, the spindle disappears, and cytokinesis

follows.


What happens during meiosis 2? - answer✔sister chromatids separate.


What happens in prophase 2 of meiosis? - answer✔A new spindle forms around the

chromosomes.


What happens in metaphase 2 of meiosis? - answer✔Metaphase 2 chromosomes line up at the

equator.


What happens in anaphase 2 of meiosis? - answer✔Centromeres divide chromatids move to

opposite poles of the cells.

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