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TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION || CHAPTERS 12||FULL COMPLETE||LATEST
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TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION || CHAPTERS 12||FULL COMPLETE||LATEST
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ESTUDYTEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION
|| CHAPTERS 12||FULL COMPLETE||LATEST
1. **Eukaryotic chromosomes are made of which macromolecules?**
a) RNA and proteins
b) RNA and DNA
c) DNA and proteins
d) DNA only
**✔✔ - ANSWER**: c) DNA and proteins
2. **Starting with a fertilized egg, how many cells would an early embryo have after six cell divisions?**
a) 12
b) 32
c) 48
d) 64
**✔✔ - ANSWER**: d) 64
3. **In a diploid cell with 5 pairs of chromosomes (2n = 10), how many centromeres are in a nucleus at
G2?**
a) 5
b) 10
c) 20
d) 15
**✔✔ - ANSWER**: b) 10
4. **Scientists isolate cells with 1.5 times more DNA than G1 phase cells. What part of the cell cycle are
these cells in?**
a) M phase
b) G1 phase
c) G2 phase
d) S phase
**✔✔ - ANSWER**: d) S phase
5. **G1 phase is associated with which event?**
a) Normal growth and cell functions
b) DNA replication
c) Chromosome separation
d) Cell division
, ESTUDY
**✔✔ - ANSWER**: a) Normal growth and cell functions
6. **What is the name of the microtubule-organizing center in animal cells?**
a) Centriole
b) Centrosome
c) Spindle fiber
d) Kinetochore
**✔✔ - ANSWER**: b) Centrosome
7. **In many eukaryotic cells, why does the nuclear envelope disappear during cell division?**
a) To allow chromosomes to replicate
b) To let microtubules attach to kinetochores
c) To allow the chromosomes to grow
d) To let the cytoplasm divide
**✔✔ - ANSWER**: b) To let microtubules attach to kinetochores
8. **What is the role of the mitotic spindle in cell division?**
a) Replication of DNA
b) Growth of the cell membrane
c) Division of the cytoplasm
d) Separation of sister chromatids
**✔✔ - ANSWER**: d) Separation of sister chromatids
9. **Metaphase is characterized by which of the following?**
a) Chromosomes align in the middle of the cell
b) Chromosomes condense and become visible
c) Chromosomes move to opposite ends of the cell
d) The nuclear envelope reforms
**✔✔ - ANSWER**: a) Chromosomes align in the middle of the cell
10. **How do kinetochore microtubules help split the centromeres during cell division?**
a) By pushing the chromosomes to one side
b) By creating tension that pulls the centromeres apart
c) By breaking down the centromere
d) By attaching to the cell membrane
**✔✔ - ANSWER**: b) By creating tension that pulls the centromeres apart
11. **Some cells have multiple nuclei. How can this happen?**
a) The cell skipped cytokinesis after mitosis.
b) The cell didn't replicate its DNA.
c) The cell underwent mitosis without cytokinesis.
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