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ASU BIO182 EXAM 1,2&3 (ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS) 2024/2025
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ASU BIO182 EXAM 1,2&3(ACTUAL EXAM QUESTIONS
AND VERIFIED ANSWERS)
2024/2025
Bio 182 exam 1 - ASU
Base pair?
Different nuclei types in dna
What is a gene?
What is the purpose of cell division?
Four events must occur for cell division:
1. Reproduc?ve signal
-ini?ate cell division
2. Replica?on
3. Segrega?on
4. Cytokinesis
Binary fission
In prokaryotes, binary fission results 2 new cells.
Why can't
Chromosomes?
Wrapped up/ compiled dna
- made of dna and proteins.
Nucleosome
chroma?n
Chroma?n
,Uncoiled dna
Chromosomes
Coiled dna
The molecules that make up a chromosome are _________________ and
__________________.
B. Dna; proteins
Karyotype
The number, shapes, and sizes of the chromosomes in a cell.
Ploidy
The number of homologous chromosomes in the cell.
Diploid
One set of chromosomes from each parent - two copies of the genome.
- diploid species have matched pairs of chromosomes = homologous
chromosomes.
Haploid
The number of chromosomes in a gamete (sperm or egg) only one copy of
genome.
Homologous chromosomes
A pair of chromosomes.
Goal of mitosis
Move iden?cal gene?c info into 2 new cells.
A diploid cell entering mitosis
- 3 pairs of chromosomes
- 2n = 6
G1 phase
- protein synthesis
- takes about 10 hrs.
, G2 phase
Prepara?on for mitosis.
Needs more proteins to mitosis to go.
Centrosomes make their way to the north and south pole.
S phase
(dna synthesis)
- dna is copied before cell division.
- centrosomes are replicated.
Mitosis
Goals:
separate replicated dna
move them to opposite sides of the cell
form new cells around them
Prophase 1
Chroma?n / dna coils up into chromosomes.
Spindle fibers spread to
Prometaphase
Nuclear envelope breaks down
kinetoc
Metaphase
Chromosomes line up. (equatorial)
Anaphase
Paired sister chroma?ds separate
separated daughter chromosomes migrate
Telophase
- daughter chromosomes reach the poles.
- the nuclear envelope reforms.
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