BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 10, Problem 5U
The kinetochore is a structure that functions to
a. connect the centromere to microtubules.
b. connect centrioles to microtubules.
c. aid in chromosome condensation.
d. aid in chromosome cohesion.
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the kinetochore of a metaphase chromosome is
a. The ends of the chromosome that are duplicated by telomerase.
b. The repeated DNA sequence at the centromere that is composed of cohesion protein.
c. A protein complex that assembles on the outer surface of the chromosome to mediate attachment to the kinetochore microtubules
d. The protein complext that contains cohesion and mediates attachment of the sister chromatids.
Which of the following statements about chromosomes and centromeres is INCORRECT?(choose the letter that corresponds to the answer)
A. A centromere is a constriction visible on metaphase chromosomes.
B. Centromere position is a useful marker for dividing chromosomes into karyotype groups.
C. Centromeric protein-A replaces histone H3 in nucleosomes found at the centromere.
D. Acentric and dicentric chromosomes are genetically stable chromosomes.
Which of the following occurs during metaphase I?
A. Homologous chromosomes pack tightly, pair up, and swap segments.
B. Homologous chromosome pairs are aligned midway between spindle poles.
C. The spindle separates the homologous chromosomes and moves them toward opposite spindle poles.
D. A complete set of chromosomes cluster at each cell end, and two haploid nuclei are produced.
Chapter 10 Solutions
BIOLOGY
Ch. 10.1 - Prob. 1LOCh. 10.2 - Prob. 1LOCh. 10.2 - Distinguish between homologues and sister...Ch. 10.2 - Prob. 3LOCh. 10.3 - Describe the eukaryotic cell cycle.Ch. 10.4 - Prob. 1LOCh. 10.4 - Prob. 2LOCh. 10.5 - Describe the phases of mitosis.Ch. 10.5 - Explain the importance of metaphase.Ch. 10.5 - Compare cytokinesis in plants and animals.
Ch. 10.6 - Prob. 1LOCh. 10.6 - Prob. 2LOCh. 10.7 - Prob. 1LOCh. 10.7 - Prob. 2LOCh. 10 - Binary fission in prokaryotes does not require the...Ch. 10 - Chromatin is composed of a. RNA and protein. b....Ch. 10 - What is a nucleosome? a. A region in the cells...Ch. 10 - What is the role of cohesin proteins in cell...Ch. 10 - The kinetochore is a structure that functions to...Ch. 10 - Separation of the sister chromatids occurs during...Ch. 10 - Why is cytokinesis an important part of cell...Ch. 10 - What steps in the cell cycle represent...Ch. 10 - Cyclin-dependent kinases (Cdks) are regulated by...Ch. 10 - Prob. 2ACh. 10 - Genetically, proto-oncogenes act in a dominant...Ch. 10 - The metaphase to anaphase transition involves a....Ch. 10 - The main difference between bacterial cell...Ch. 10 - In animal cells, cytokinesis is accomplished by a...Ch. 10 - Regulation of the cell cycle is very complex and...Ch. 10 - Review you knowledge of signaling pathways...Ch. 10 - Compare and contrast how mutations in cellular...
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- Crossing over is the process wherebya. homologous chromosomes cross over to opposite sides of the cell.b. homologous chromosomes exchange chromosomal material.c. homologous chromosomes become closely associated along their lengths.d. kinetochore fibers attach to both sides of a centromerearrow_forwardWhich of the following situations does not describes a chromosomal mutation? Select one: a. A cytosine nucleotide is substituted for thymine nucleotide in a gene. b. A portion of Chromosome 4 is deleted during interphase of meiosis. c. The sister chromatids of Chromosome 18 do not separate during anaphase II. d. A section of Chromosome 17 is duplicated leading to problems in the peripheral nervous system.arrow_forwardDescribe the role of the following structures or proteins in cell division: a. microtubules b. cohesin protein c. kinetochores d. synaptonemal complexarrow_forward
- Match each term with its description Chromatid Chromosome + Chromatin Homologous chromosomes Sister chromatids A. "Chromosome pairs inherited from each parent. Chromosomes pairs with same shape, same size and same genes. " B. One of the two identical copies making a chromosome C. Chromatids product of DNA duplication D. Single piece of chromatin tightly packed DNA with proteins E. Loosely-packed DNA with proteinsarrow_forwardEukaryotic chromosomes a. have only histones b. have DNA and RNA c. have DNA, RNA, and protein d. have DNA, histones, and scaffold protein e. are made of RNA and proteinarrow_forwardThe complex of proteins that holds two chromatids together is called the... Group of answer choices A. centromere B. spindle microtubule C. kinetochore D. centrosome E. centriolearrow_forward
- Instructions Match the letters that describe the process with the numbers in the Venn Diagram. Each letter and number is only used once. A. Uses a spindle B. Sisters separate C. Homologs separate D. Sister chromatids that are non identical are present E. All genetic information in present at metaphase F. In a human, an odd number of chromosomes is present at metaphase G. Used in growth and repair of damaged tissues Mitosis 5 1 3 4 Meiosis 2 7 2 Meiosis 1 6arrow_forwardAt metaphase I, homologous chromosomes are connected only at what structures? a. chiasmata b. recombination nodules c. microtubules d. kinetochoresarrow_forwardIf a cell has completed the first meiotic division and is just beginning meiosis II, which of the following is an appropriate description of its contents? a. It has half the amount of DNA as the cell that began meiosis. b. It has the same number of chromosomes but each of them has different alleles than another cell form the same meiosis. c. If has half the chromosomes but twice the DNA of the originating cell. d. It is identical in content to another cell form the same meiosis. e. It has twice the amount of DNA as the parent cell.arrow_forward
- At metaphase I the kinetochores of sister chromatids are a. attached to microtubules from the same pole. b. attached to microtubules from opposite poles. c. held together with cohesin proteins. d. not attached to any microtubules.arrow_forwardIn animals, which of the following distinguishes meiosis from mitosis? a. Meiosis is a form of asexual division, whereas mitosis is a form of sexual division. b. In mitosis, single loops of DNA are copied, whereas meiosis involves multiple linear chromosomes. O c. Mitosis is used for the repair of cells, whereas meiosis creates cells for sexual reproduction. d. Mitosis occurs in prokaryotic cells, whereas meiosis occurs in eukaryotic cells.arrow_forwardWhich of the following is a FALSE statement regarding human chromosomes? A. The chromosome number in humans is 2n=46. B. Gametes have half number of the chromosomes as in somatic cells. C. There are 22 pairs of autosomes and 2 sex chromosomes. D. Liver cells can be polyploids. They can have 23, 46, 69 or 92 chromosomes.arrow_forward
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