20. Which of the following occurs during mitosis but not during meiosis I?(A) The chromosomes are pulled to opposite poles of the spindle apparatus.(B) The chromatids of each chromosome are separated.(C) The nuclear envelope breaks down.(D) Both synapsis and crossingover take place.(E) The diploid number of chromosomes is reduced to the haploid number.21. Oxygen consumption can be used as a measure of metabolic rate because oxygen is(A) necessary for ATP synthesis by oxidative phosphorylation(B) necessary to replenish glycogen levels(C) necessary for fermentation to take place(D) required by all living organisms(E) required to break down the ethanol that is produced in muscles22. Membranes are components of all of the following EXCEPT a(A) microtubule(В) nu(C) Golgi apparatus(D) mitochondrion(E) lysosome23. In a mesophyll cell of a leaf, the synthesis of ATP occurs in which of the following?I.RibosomesII.MitochondriaIII.Chloroplasts(A) I only(В) II only(C) III only(D) II and III only(E) І, II, and Ш24. Prokaryotic and eukaryotic cells generally have which of the following features in common?(A) A membranebound nucleus(B) A cell wall made of cellulose(C) Ribosomes(D) Flagella or cilia that contain microtubules(E) Linear chromosomes made of DNA and protein25. Plant stems bend toward a light source as a result of increased(A) chlorophyll synthesis on the side of the stem near the light source(B) cell division on the side of the stem near the light source(C) cell division on the side of the stem away from the light source(D) cell elongation on the side of the stem near the light source(E) cell elongation on the side of the stem away from the light source

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20. Which of the following occurs during mitosis but not during meiosis I? (A) The chromosomes are pulled to opposite poles of the spindle apparatus. (B) The chromatids of each chromosome are separated. (C) The nuclear envelope breaks down. (D) Both synapsis and crossingover take place. (E) The diploid number of chromosomes is reduced to the haploid number.

20. Which of the following occurs during mitosis but not during meiosis I? (A) The chromosomes are pulled to opposite poles of the spindle apparatus. (B) The chromatids of each chromosome are separated. (C) The nuclear envelope breaks down. (D) Both synapsis and crossingover take place. (E) The diploid number of chromosomes is reduced to the haploid number.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter14: Dna Structure And Replication

Section: Chapter Questions

Problem 11TYK: Discuss Concepts Eukaryotic chromosomes can be labeled by exposing cells to radioactive thymidine...

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Similar questions

Metaphase in mitosis is similar to what stage in meiosis? a. prophase I b. prophase II c. metaphase I d. metaphase II e. crossing-over
Discuss Concepts Eukaryotic chromosomes can be labeled by exposing cells to radioactive thymidine during the S phase of interphase. If cells are exposed to radioactive thymidine during the S phase, would you expect both or only one of the sister chromatids of a duplicated chromosome to be labeled at metaphase of the following mitosis (see Section 10.2)?
The first suggestion that chromosomes may physically exchange segments came from the microscopic identification of. synapsis sister chromatids chiasmata alleles
Explain how the random alignment of homologous chromosomes during metaphase I contributes to the variation in gametes produced by meiosis.
Discuss Concepts A cell has 38 chromosomes. After mitosis and cell division, one daughter cell has 39 chromosomes and the other has 37. What might have caused these abnormal chromosome numbers? What effects do you suppose this might have on cell function? Why?
In what ways is meiosis II similar to and different from mitosis of a diploid cell?
__1. How many sperms will be formed from 16 secondary spermatocytes? __2. If an organism’s somatic cell has 2n=8, what will be the chromosome number of its gametes (undergo meiosis I and II)?
2. How do the stages of mitosis and meiosis occur in a specific order and never alternate?
1. What materials provide the substance of a densely staining chromosomes present during mitosis? 2. What hereditary components are the chromosomes believed to carry with them?
1. how DNA be replicated during Interphase. What enzymes might be involved in DNA replication? 2. why it is important for gametes to have half the number of chromosomes as normal body cells. 3. In which ways does meiosis allow for the production of genetically different cells?
1.Meiosis results in how many more daughter cells than mitosis? 2. Which type of cell division involves ripping "double" chromosomes into "single" chromosomes? 3. Sarah inherits a new mutation from her mother. During which stage of cell division did the mutation likely occur? 4. The nuclear membrane dissolves during which stage?
18. Which of the following occurs in meiosis but not in mitosis? A. Attachment of spindle fibers to kinetochore B. Separation of sister chromatids at anaphase C. Replication of DNA prior to start of cell division D. Pairing of homologous chromosomes at metaphase plate