Textbook Question
The centromere is a region at which ________.
a. Sister chromatids are attached to each other.
b. Metaphase chromosomes align.
c. The tips of chromosomes are found.
d. The nucleus is located.
Ch. 6 - Cancer
Belk, Maier6th EditionBiology: Science for LifeISBN: 9780135214084
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Table of contents
- Ch. 1 - Can Science Cure the Common Cold?12
- Ch. 2 - Science Fiction, Bad Science, and Pseudoscience12
- Ch. 3 - Is It Possible to Supplement Your Way to Better Performance and Health?10
- Ch. 4 - Body Weight and Health10
- Ch. 5 - Life in the Greenhouse10
- Ch. 6 - Cancer10
- Ch. 7 - Fertility10
- Ch. 8 - Does Testing Save Lives?10
- Ch. 9 - Biology of Wrongful Convictions10
- Ch. 10 - Genetically Modified Organisms10
- Ch. 11 - Where Did We Come From?13
- Ch. 12 - An Evolving Enemy8
- Ch. 13 - Understanding Race11
- Ch. 14 - The Greatest Species on Earth?8
- Ch. 15 - Is the Human Population Too Large?10
- Ch. 16 - Conserving Biodiversity12
- Ch. 17 - The Human Footprint10
Belk, Maier6th EditionBiology: Science for LifeISBN: 9780135214084Not the one you use?Change textbook
Chapter 6, Problem 7
Sister chromatids ________.
a. Are two different chromosomes attached to each other.
b. Are exact copies of one chromosome that are attached to each other.
c. Arise from the centrioles.
d. Are broken down by mitosis.
e. Are chromosomes that carry different genes.
Verified step by step guidance1
Understand the term 'sister chromatids': Sister chromatids are identical copies of a single chromosome that are formed during DNA replication. They are connected by a structure called the centromere.
Eliminate option (a): Sister chromatids are not two different chromosomes. They are identical copies of the same chromosome, so this option is incorrect.
Eliminate option (c): Sister chromatids do not arise from centrioles. Centrioles are involved in organizing the spindle fibers during cell division, not in the formation of chromatids.
Eliminate option (d): Sister chromatids are not broken down by mitosis. Instead, they are separated into individual chromosomes during mitosis, specifically during anaphase.
Eliminate option (e): Sister chromatids do not carry different genes. Since they are exact copies of the same chromosome, they carry identical genetic information. This leaves option (b) as the correct description.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Sister Chromatids
Sister chromatids are identical copies of a single chromosome that are formed during DNA replication. They remain attached at a region called the centromere until they are separated during cell division. This ensures that each daughter cell receives an exact copy of the genetic material.
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Chromosome Structure
A chromosome is a long DNA molecule that contains genetic information. Each chromosome consists of two sister chromatids joined together, which are crucial for the accurate distribution of genetic material during cell division. Understanding chromosome structure is essential for grasping how genetic information is inherited.
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Mitosis
Mitosis is the process of cell division that results in two genetically identical daughter cells. During mitosis, sister chromatids are separated and distributed to each daughter cell, ensuring that they each receive the same genetic information. This process is vital for growth, development, and tissue repair in multicellular organisms.
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Related Practice
Textbook Question
Mitosis ________.
a. Occurs only in cancerous cells.
b. Occurs only in skin cells.
c. Produces daughter cells that are exact genetic copies of the parent cell.
d. Results in the production of three different cells.
Textbook Question
At metaphase of mitosis, ________.
a. The chromosomes are condensed and found at the poles.
b. The chromosomes are composed of one sister chromatid.
c. Cytokinesis begins.
d. The chromosomes are composed of two sister chromatids and are lined up along the equator of the cell.
Textbook Question
DNA polymerase ________.
a. Attaches sister chromatids at the centromere.
b. Synthesizes daughter DNA molecules from fats and phospholipids.
c. Is the enzyme that facilitates DNA synthesis.
d. Causes cancer cells to stop dividing.
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Textbook Question
If a cell at G1 contains four picograms of DNA, how many picograms of DNA will it contain at the end of the S phase of the cell cycle?
a. 0
b. 2
c. 4
d. 8
Textbook Question
In what ways is the cell cycle similar in plant and animal cells, and in what ways does it differ?
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