asu bio 182 exam 2 and practice exam newest actual
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ASU BIO 182 EXAM 2 AND PRACTICE EXAM
NEWEST ACTUAL EXAM COMPLETE 160
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
base pair? - ANSWER different nuclei types in DNA
what is a gene? - ANSWER
What is the purpose of cell division? - ANSWER Four events must occur for cell
division:
1. Reproductive Signal
-initiate cell division
2. Replication
3. Segregation
4. Cytokinesis
Binary Fission - ANSWER In prokaryotes, binary fission results 2 new cells.
Why can't - ANSWER
Chromosomes? - ANSWER wrapped up/ compiled DNA
- made of DNA and proteins.
Nucleosome
Chromatin
Chromatin - ANSWER uncoiled dna
chromosomes - ANSWER coiled dna
The molecules that make up a chromosome are _________________ and
__________________. - ANSWER B. DNA; proteins
Karyotype - ANSWER the number, shapes, and sizes of the chromosomes in a cell.
Ploidy - ANSWER the number of homologous chromosomes in the cell.
Diploid - ANSWER one set of chromosomes from each parent - two copies of the
genome.
- diploid species have matched pairs of chromosomes = homologous chromosomes.
Haploid - ANSWER the number of chromosomes in a gamete (sperm or egg) only
one copy of genome.
Homologous Chromosomes - ANSWER a pair of chromosomes.
, Goal of mitosis - ANSWER move identical genetic info into 2 new cells.
A diploid cell entering mitosis - ANSWER - 3 pairs of chromosomes
- 2n = 6
G1 phase - ANSWER - protein synthesis
- takes about 10 hrs.
G2 Phase - ANSWER preparation for mitosis.
needs more proteins to mitosis to go.
centrosomes make their way to the north and south pole.
S phase - ANSWER (DNA synthesis)
- DNA is copied before cell division.
- centrosomes are replicated.
Mitosis - ANSWER Goals:
Separate replicated DNA
Move them to opposite sides of the cell
Form new cells around them
Prophase 1 - ANSWER chromatin / DNA coils up into chromosomes.
spindle fibers spread to
Prometaphase - ANSWER nuclear envelope breaks down
kinetoc
Metaphase - ANSWER chromosomes line up. (equatorial)
Telophase - ANSWER - Daughter chromosomes reach the poles.
- the nuclear envelope reforms.
- chromatin becomes diffuse.
- cell again enters interphase.
Which of the following statements about mitosis are true? - ANSWER C. Two
genetically identical daughter cells are formed.
Chromatin condenses to form discrete, visible chromosomes - ANSWER D. during
prophase
- ANSWER somatic cells (cells of the body)
1/29 Mature nerve cells are incapable of cell division, so they are most likely in -
ANSWER A. G1 phase
1/29 If a cell is going from diploid(2n) to haploid(1n) daughter cells, is it mitosis or
meiosis? - ANSWER It is Meiosis.
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