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C190 WGU- Intro to Bio, Unit 5 Exam Questions and Complete Solutions Graded A+
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C190 WGU- Intro to Bio, Unit 5 Exam Questions and Complete Solutions Graded A+
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C190 WGU- Intro to Bio, Unit 5 ExamQuestions and Complete Solutions
Graded A+
in which phase of the cell cycle does DNA replication take place? - Answer: S
Interphase is the part of the cell cycle when the cell _____________. - Answer: grows and duplicates its
DNA.
In which stage of the cell cycle are new daughter cells formed? - Answer: Cytokinesis.
During replication when DNA is being copied, what form would you expect the chromosomes to be in? -
Answer: Loosely wound.
during cell division, when the chromosomes are being moved around in the cell, what form would you
expect the chromosomes to be in? - Answer: tightly wound around the histone proteins as
chromosomes.
diploid corn cells have 20 chromosomes. This means that in corn, _____________.
a) 2n=5
b) 2n=10
c)2n= 20
d) 2n= 40 - Answer: 2n=20
In a dog, 2n= 78. how many chromosomes do most cells in a dog's heart contain? - Answer: 78
in goldfish, 2n= 104. how many chromosomes are in a goldfish egg?
a) 26
b)52
, c) 104 - Answer: 52
A single gamete can grow into a zygote through the process of mitosis: T or F. - Answer: false
A zygote grows into an organism through what process? - Answer: Mitosis
A skin cell would divide to make more skin cells using the process of: - Answer: Mitosis
Why must gametes be produced through meiosis? - Answer: Because gametes are used for sexual
reproduction.
What do tumor suppressor genes do? - Answer: they prevent uncontrolled cell division.
what do proto-oncogenes do? - Answer: they encourage the process of cell division.
what function most closely describes how both tumor suppressor genes and proto-oncogenes work? -
Answer: they regulate the cell cycle.
proto-oncogene - Answer: promotes cell division based on signals that trigger cell division.
tumor suppressor genes - Answer: inhibits cell division based of signals that stop cell division.
Normal cells will only divide if they receive growth signals. Cancer cells do not require these growth
signals to divide. These cells keep dividing even when the organism doesn't need any more of them.
What kind of mutation is this? - Answer: The mutation of a proto-oncogene to an oncogene.
Normal cells also respond to anti-growth signals. Cancer cells, however, are insensitive to these anti-
growth signals. These cells keep dividing even when the organism tells them to stop. What kind of
mutation is this? - Answer: The mutations of a tumor suppressor gene.
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