Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 10, Problem 6RQ
The first level of DNA organization in a eukaryotic cell is maintained by which molecule?
- cohesin
- condensin
- chromatin
- histone
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The first level of DNA organization in a eukaryotic cell is maintained by which molecule? a. cohesin b. condensin c. chromatin d. histone
Also inside the nucleus is the (chromatin/ chromosomes / nucleolus) which contains ribosomal RNA.
The eukaryotic cell contains a variety of structures in the cytoplasm. The (ribosomes / golgi apparatus / mitochondria) are the site of protein synthesis and can be free floating or attached to the ER. The ER exists in two forms. One form contains ribosomes and is termed (rough / bumby / smooth) ER and the other is lacking ribosomes and is termed (silky / smooth / rough) ER.
The ER packages substances that are sent to the packaging house of the cell. This organelle is the
Which of the following is the most compact level of chromatin structure?
Metaphase chromosomes
30 nm fiber
beads-on-a-string
loops tethered to a protein scaffold
All are equally compact
Chapter 10 Solutions
Biology 2e
Ch. 10 - Figure 10.6 Which of the following is the correct...Ch. 10 - Figure 10.13 Rb and other proteins that negatively...Ch. 10 - Figure 10.14 Human papillomavirus can cause...Ch. 10 - A diploid cell has ________ the number of...Ch. 10 - An organism s traits are determined by the...Ch. 10 - The first level of DNA organization in a...Ch. 10 - Identical copies of chromatin held together by...Ch. 10 - S. Chromosomes are duplicated during what stage of...Ch. 10 - Which of the following events does not occur...Ch. 10 - The mitotic spindles arise from which cell...
Ch. 10 - Attachment of the mitotic spindle fibers to the...Ch. 10 - Unpacking of chromosomes and the formation of a...Ch. 10 - Separation of the sister chromatids is a...Ch. 10 - The chromosomes become visible under a light...Ch. 10 - The fusing of Golgi vesicles at the metaplhase...Ch. 10 - At which of the cell-cycle checkpoints do external...Ch. 10 - What is the main prerequisite for clearance at the...Ch. 10 - If the M checkpoint is not cleared, what stage of...Ch. 10 - Which protein is a positive regulator that...Ch. 10 - Many of the negative regulator proteins of the...Ch. 10 - Which negative regulatory molecule can trigger...Ch. 10 - are changes to the order of nucleotides in a...Ch. 10 - A gene that codes for a positive cell-cycle...Ch. 10 - A mutated gene that codes for an altered version...Ch. 10 - Which molecule is a Cdk inhibitor that is...Ch. 10 - Which eukaryotic cell-cycle event is missing in...Ch. 10 - FtsZ proteins direct the formation of a...Ch. 10 - Compare and contrast a human somatic cell to a...Ch. 10 - What is the relationship between a genome,...Ch. 10 - Eukaryotic chromosomes are thousands of times...Ch. 10 - Briefly describe the events that occur in each...Ch. 10 - Chemotherapy drugs such as vincristine (derived...Ch. 10 - Describe the similarities and differences between...Ch. 10 - List some reasons why a cell that has just...Ch. 10 - What cell-cycle events will be affected in a cell...Ch. 10 - Describe the general conditions that must be met...Ch. 10 - Compare and contrast the roles of the positive...Ch. 10 - What steps are necessary for Cdk to become fully...Ch. 10 - Rb is a negative regulator that blocks the cell...Ch. 10 - Outline the steps that lead to a cell becoming...Ch. 10 - Explain the difference between a proto-oncogene...Ch. 10 - List the regulatory mechanisms that might be lost...Ch. 10 - ______ can trigger apoptosis if certain cell-cycle...Ch. 10 - Name the common components of eukaryotic cell...Ch. 10 - Describe how the duplicated bacterial chromosomes...
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- In eukaryotic chromosomes, DNA wraps around _________. a. histone proteins c. centromeres b. sister chromatids d. nucleosomesarrow_forwardWhich of the following has beads on a string structure?a) Chromosomesb) Chromatinc) Nucleosomesd) Heterochromatinarrow_forwardDNA that makes up Chromosomes is complexed with proteins and is called Chromatin. One of the most important proteins associated with DNA that helps to organize it in the nucleus is called: A. Euchromatin. B. Heterochromatin. C. Histones. D. Centromeres.arrow_forward
- For each of the following pairs of chromatin types,which is the most condensed?a. 100 Å fiber or 300 Å fiberb. 300 Å fiber or DNA loops attached to a scaffoldc. euchromatin or heterochromatind. interphase chromosomes or metaphasechromosomesarrow_forwardIn eukaryotic cells, chromosomes are composed of _____. DNA and proteins DNA only DNA and RNA DNA and phospholipidsarrow_forwardDuring Mitosis, the spindle apparatus becomes connected to the: Exon Centromere Telomere Loose Endarrow_forward
- Which of the following is not true about chromatin? 1- it contains highly packed DNA 2- present in the nucleus 3- contains only double standed DNA 4- organized structure of DNA and proteinarrow_forwardPart 1: Membranes are critical to the structure and function of cells. Answer yes or no to identify which of the following cellular components are made of, or include, membranes: chromatin: ribosomes: nuclear envelope: central vacuoles: Part 2: Membrane fluidity, which allows fusion and pinching off of membranes, is critical to many cellular processes. Answer yes or no to to identify which of the following cellular processes rely directly on this property of membranes: transcription: translation: replication: protein secretion in eukaryotes:arrow_forwardLabel each phase and describe what is happening to the DNA. Interphase, Prophase, Metaphase, Anaphase, Telophase, Cytokinesisarrow_forward
- Which of the following structures could be foundwithin the nucleolus?a. chromatinb. histonesc. ribosomesd. nucleosomesarrow_forwardWhich of the following statements about heterochromatin is FALSE? It contains many repeated sequences, but few actively transcribed genes. It remains condensed through most of the cell cycle. It is found next to the centromeres and on short arms in human chromosomes. It is enriched for transposable elments Histone proteins in heterochromatin are heavily acetylated, reducing their affinity for the DNA backbone.arrow_forwardWhat term best describes a entity with the following characteristics? in eukaryotes, a long, linear strand of double-helical DNA wrapped around nucleosomes, often with telomeres at each end and a single centromere near the middle Group of answer choices centrosomes chromatids chromosomes centriolesarrow_forward
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